Report No. S1
Farm-based National Totals
1. Definition of the Commodity Flow Data Gap
1.1. General Description
The 2002 Commodity Flow Survey (CFS) collects data from business establishments with paid employees that are located in the United States. These establishments are classified using the North American Industrial Classification System (NAICS). In terms of agricultural products, the CFS includes shipments from food manufacturing, beverage and tobacco product manufacturing, as well as wholesale trades. However, due to its sampling frame design, the CFS does not capture farm-based agricultural shipments that occur prior to the storage elevators (e.g., grain) or distribution/processing centers (e.g., fruit, livestock). Note that agricultural shipments outbound from these storage elevators and processing centers are captured by the CFS.
Based on prior CFS surveys and reports, farm-based agricultural shipments are known to be one of the most significant out-of-scope areas excluded from the CFS data collection effort.
1.2. Commodities involved in the data gap
In 1993, the U.S. Bureau of Census used the Standard Transportation Commodity Codes (STCC) as its commodity classification system for the CFS. The STCC has evolved since the 1960s and is used primarily for analyses involving the railroad industry. Realizing the limitations in the STCC system, as well as seeking to provide better detail of commodities not typically carried by rail and better comparability with the Harmonized System (HS) used worldwide for international trade, statistics agencies in the United States and Canada jointly developed the Standard Classification of Transported Goods (SCTG). Since 1997, the CFS has used the SCTG system for its commodity reporting.
Commodities involved in the CFS 2002 data gap for farm-based agricultural shipments are briefly discussed in the following sections.
1.2.1. SCTG codes
Three major 2-digit-SCTG codes are most likely to be impacted by this CFS data gap. They are:
01 Live animals and live fish
02 Cereal grains (including seed)
03 Other agricultural products (except for animal feed)
While the shipment of commodity code 04 – animal feed and products of animal origin – is also a part of agricultural transportation activities, it is assumed that shipments of this type are captured within the CFS because of processing requirements (e.g., not harvested or raised at a farm).
1.2.2. STCC codes
Under the STCC system, commodity groups that are impacted by this CFS data gap are:
01 Farm products
09 Fresh fish or other marine products
1.3. Establishments involved in the data gap
As mentioned above, CFS collects data from business establishments in the United States. Beginning in 2002, establishments were sorted into industry sectors using the NAICS. The Standard Industrial Classification (SIC) system was used in the 1993 and 1997 CFS. Because farms are excluded from the CFS survey frame, farm-based agricultural shipments are out-of-scope for the CFS under both SIC and NAICS classification systems. Specifically for this data gap, the missing shipments are agricultural products that are shipped from a farm site to the first point of processing or storage, i.e. processing center or terminal elevator. As stated previously, CFS does cover the shipments of these products from the initial processing centers or terminal elevators onward (e.g. to the market or for exports).
1.3.1. NAICS codes
Establishments classified under the entire NAICS code 11 (i.e., Agriculture, Forestry, Fishing and Hunting) were not included in the CFS survey-sampling frame. A detailed listing of these establishments under the 2002 NAICS definitions can be found at the Census website: http://www.census.gov/epcd/naics02/naicod02.htm.
Specifically, the farm-based agricultural shipments impact the following 3-digit NAICS codes that relate to the out-of-scope shipments discussed in this report:
111 Crop Production
112 Animal Production
115 Support Activities for Agriculture and Forestry (e.g., crop harvesting)
1.3.2. NAICS-SIC conversion issues
The conversion from SIC to NAICS does not impact this data gap. Farms were excluded under both SIC and NAICS definitions of industry sectors.
2. Importance of the Data Gap
2.1. Value and tonnage as a share of national shipments
Based on a similar CFS-related study, total tonnage from farm-based agricultural shipments was estimated at over 1 billion tons in 1997. This accounted for over 7% of the estimated total national tonnages being moved in the United States during 1997. Similarly, its total value was estimated at approximately $197 billion, which accounted for over 2% of the national total in the same year. Along with shipments made by foreign establishments (i.e., imports) and crude petroleum, farm-based agriculture is one of the three most significant missing components for the CFS in terms of tons.
Although statistics on total freight activities in the United States for 2002 will not be produced until estimates on all CFS data gaps are completed, a similar level of importance (as in 1997) can be expected. Preliminary estimates for this CFS-out-of-scope component indicate that a total of 1,051 million tons, with value of approximately $201 billion, were shipped from farm to their first point of storage or processing locations in 2002. To put this in perspective, the national total of freight shipments captured by the 2002 CFS is 11,668 million tons and valued at over $8,397 billion. That is, the estimated amount for farm-based agricultural shipments is about 9 percent in weight, and about 2 percent in value, of what CFS has captured in 2002.
2.2. Value and tonnage as a share for individual modes
Since most farm-based agricultural shipments of concern are likely to be local activities, it is reasonable to assume all farm-based agricultural shipments are transported by truck. Under this assumption, the estimated tonnage for this out-of-scope component (i.e. 1,051 million tons) is about 13 percent of the CFS-captured truck shipment tonnages (totaled at about 7,843 million tons). Similarly, when comparing in dollar values, the amount from this data gap (i.e. $201 million) is at the level of approximately 3 percent of total CFS truck freight (about $6,235 billion).
A more detailed discussion on this mode-of-transportation assumption is provided in the next section.
2.3. Geographic concentration: dispersed versus concentrated, local versus long distance
According to the finding of a 2001 survey conducted by the Upper Great Plains Transportation Institute (UGPTI) with assistance from nine state elevator organizations (including Colorado, Kansas, Minnesota, Montana, Nebraska, North Dakota, Oklahoma, South Dakota, and Texas), on average, grain elevators purchase about 72% of the grain they handle from a draw area within a radius of 29 miles or less around the elevator.1 Regarding equipment employed for inbound grain deliveries (i.e. from farm site to elevator), the study also found that the majority of the grain delivered to elevators responding to this survey arrived via semi-truck and trailer. In fact, this survey found that only about 2 percent of inbound grain deliveries were delivered via equipment other than single-axle, tandem-axle, tri-axle, or semi-tractor and trailer.
Although the UGPTI grain elevator study only considered a limited type of farm-based agricultural shipments (corn, wheat, and soybeans) in 9 states, the findings confirmed the assumptions used by ORNL in estimating farm-based shipments.2 They are (1) most farm-based agricultural shipments are local activities and (2) most of these shipments are transported by truck.
Based on information derived from the Vehicle Inventory and Use Survey (VIUS) 2002 data, of all truck operators indicating agricultural-related products as their “principal products carried,” over 90 percent reported that they primarily operated within their home base state3 during 2002. Four major agricultural products are included in the VIUS; they are: live animals and fish, animal feed, grains, and other agricultural products. The percentages of “operating mostly within home base state” varied slightly, ranging from 90% to 95%, when the four major agricultural product groups are analyzed separately. Nevertheless, this reconfirms that almost all farm-based agricultural shipment activities are local.
Furthermore, depending on the commodity type, the geographic concentration of these farm-based agricultural freight activities could either be dispersed or concentrated. For example, only 4 states (CA, FL, TX, and AZ) harvest oranges, but many more states grow apples. However, at the 2-digit SCTG level (e.g. oranges and apples are both included under SCTG 03) the geographic concentration of farm-based agricultural shipments is expected to be more dispersed.
2.4. Importance to international trade
As discussed previously, this CFS data gap covers shipments originating from a U.S. farm site to the first point of storage or processing location. For this reason, this data gap has no bearing on international imports. On the other hand, some of these farm-based agricultural shipments could eventually be shipped overseas or across the border to Canada or Mexico. Direct exports by farmers are possible but are expected to be quite small. Therefore, this data gap is assumed to have very little impact on exported international trade.
Furthermore, since most of these farm-based shipments are captured by the CFS at their first points of storage or processing centers, which are likely to be in-scope for the CFS, shipments intended for foreign destinations will most likely have been reported as exports by those shippers. Aside from the fact that CFS undercounts exports, the direct impact from farm-based agricultural shipments on international trade (i.e., tons and value exported) is likely to be small. In other words, to avoid double counting, the farm-based agricultural shipments (movements inbound to storage elevators or processing centers) should be considered as domestic shipments only.
3. Data Sources
3.1. Coverage in CFS
Farm-based agricultural shipments are an out-of-scope data gap of the CFS. None of this type of shipment is captured by the CFS.
3.2. Coverage in other data sources
The main data sources used in filling this farm-based agricultural shipment data gap were: the 2002 Census of Agriculture and the 2004 Agricultural Statistics; both are published by the U.S. Department of Agriculture (USDA).
2002 Census of Agriculture
The Census of Agriculture is a census conducted every five years by the USDA. It is the leading source of facts and statistics about U.S. agricultural production. The Census of Agriculture provides statistical information at the national, state, and county (or county equivalent) levels. All agricultural production establishments (e.g., farms, ranches, nurseries, greenhouses, etc.) are included. The latest available data from the Agriculture Census is 2002.
Agricultural Statistics 2004
Agricultural Statistics is an annual publication prepared by the National Agricultural Statistics Service (NASS) of the USDA. It provides information on agricultural production, supplies, consumption, facilities, costs, and returns. Weights, measures, and conversion factors are published in this reference book. The latest publication is 2004 Agricultural Statistics, which includes preliminary estimates for 2002 and projection estimates for 2003.
With the above USDA data, tonnage and dollar value of farm-based agricultural shipments can be estimated. Ton-mile estimates, on the other hand, required the use of an additional data source and assumptions. Several pieces of information from the 2002 VIUS were used to derive the ton-mile estimates needed for this study.
2002 VIUS
As a part of the Economic Census, the Bureau of Census collects information on the physical and operational characteristics of the private and commercial truck population in the United States. The VIUS survey is conducted in the same year as the CFS (also a part of the Economic Census). The latest data is for 2002, which was released recently on CD-ROM.
3.3. Data quality
The main source of data used in estimating ton and value for this data gap are from the USDA Agriculture Census. Because this is a Census, it is not subject to sampling errors. Non-sampling errors might exist, but should be relatively small. Shipment mileage was estimated using VIUS data from the U.S. Census along with some simple assumptions (e.g. truck, local). The national estimates of tons, value, and ton-mile are expected to be relatively reliable. However, estimates at the sub-state geography level (which will be needed for regional level estimates) may be subject to a higher degree of uncertainty, particularly the ton-mile estimates.
3.4. Other issues
The assumptions used in estimating ton-miles require information on the location in which the truck operates. Due to the lack of better data, the VIUS home base state was assumed to be the operating-state for the purpose of estimating average trip length.
Another possible issue is whether “shipments” from feedlots and stockyards to processing facilities are captured under this study. The concern is that, rather than a single leg from the farm to the first point-processing center as discussed earlier, some live stock shipments may involve a 2-legged operations (e.g. from farm to feedlot and from feedlot to slaughter house).
Based on information obtained from the Livestock Division of the NASS/USDA4, farmers may “place” cattle or calves on feedlots for later sale but rarely “sell” them to feedlots. USDA surveys include all types of farms5, ranging from family-owned small farms to large corporations and cooperative owned farms. Specifically, to avoid possible double counting, large corporations are asked to report only livestock that are raised by the company and not those purchased from farmers. The sale of cattle and calves reported in the Census of Agriculture, therefore, includes those raised and sold by farmers (either directly to market/slaughter houses, or by placing them in a feedlot and sold later to markets/slaughter houses) and those raised and sold by corporations.
Therefore, further investigation regarding this feedlot and stockyard issue is not recommended.
4. Estimation Methods
4.1. General description of estimation method
The dollar value of this out-of-scope data gap can be estimated directly with information obtained from the 2002 Census of Agriculture publication. Specifically, data provided under the category of “Market value of agricultural products sold”6 was used as an estimate for total farm-based agricultural shipments. The estimation of tonnages for these out-of-scope shipments is not as straightforward, however.
Statistics in the 2002 Census of Agriculture as published by the USDA are typically in different units of measurement (e.g., pounds, bushels, hundredweight, barrels, tons, etc). Therefore, unit conversions are necessary. This conversion is not a trivial matter. In many cases, different conversion factors are needed for different commodities even though the “same” unit is used. For example, the approximate net weight for a bushel of wheat is 60 pounds, while a bushel of corn is 70 pounds for husked corn on the ear, and 56 pounds for shelled corn. All conversion factors used in this study are based on information obtained from Agriculture Statistics 2004.
Once all data are converted into the same unit of measurement (i.e. pounds), estimates of the total shipment tonnages are computed based on its 2-digit SCTG categories. Note that the USDA does not use the SCTG code for its commodity categorization. All data on farm-based agricultural commodities extracted for the purpose of this study (see Appendix of this report) are regrouped into SCTG categories, to the extent that is possible and reasonable.
4.2. Method for estimating national totals
The estimates of national total value and tonnage for farm-based agricultural shipments can be obtained using the method described above. The results are presented in Table 1 below. Itemized farm-based agricultural products included in the national totals are provided in the Appendix of this report.
| SCTG | Commodity Description | Weight (thousand ton) | Value ($ million) |
|---|---|---|---|
| 1 | Live animal and live fish | 90,929 | $105,494 |
| 2 | Cereal grains | 795,382 | $39,958 |
| 3 | Other agricultural products | 164,974 | $55,194 |
| Total | 1,051,285 | $200,646 |
In order to estimate ton-miles for farm-based agricultural shipments, information on the length of movement for these shipments (or haul length) is needed. Since this mileage information is not readily available, it has to be estimated. In general, trip distance would vary depending on the type of commodities, where the product is harvested or raised, where the processing center or storage facility is located, and how it is shipped. Estimating haul distances at this level of detail would be cumbersome.
As mentioned previously, VIUS is the main source of data used in this study for estimating shipment mileages. VIUS micro data furnished information on the typical area of operation of trucks carrying agricultural products. This information is given in categories such as: off-the-road; 50 miles or less; 51 to 100 miles; 101 to 200 miles; 201 to 500 miles; 501 miles or more; not reported; and not applicable (vehicle not in use). Because the primary interest of the Freight Analysis Framework (FAF)7 is on those utilizing the national transportation systems, off-road activities are not included in this study. Furthermore, with the exception of the State of Alaska and possibly Texas, the within-state operating range for all other states in the United States should all be within 500 miles. Therefore, the category of “501 miles or more” is also eliminated from this study. Using mid-points of the remaining range categories and the distribution of operating ranges, a weighted average trip length is estimated for each of the three SCTG commodity-carrying truck groups (i.e. principal product carried). These national weighed-average lengths of haul estimates are shown in Table 2.
| SCTG | Average length of trip |
|---|---|
| 01 – Live animal & live fish | 55.5 miles |
| 02 – Cereal grains | 35.7 miles |
| 03 – Other agricultural products | 41.1 miles |
| All agriculture combined | 44.0 miles |
A brief discussion of a similar average trip-length estimation procedure, at the state level, can be found in a 1998 Journal of Transportation and Statistics article8. Applying tonnage estimates as shown in Table 1 to trip length estimates presented in Table 2, the preliminary total national ton-miles can then be estimates (see Table 3).
| SCTG | Ton-miles (million) |
|---|---|
| 01 – Live animal & live fish | 5,047 |
| 02 – Cereal grains | 28,395 |
| 03 – Other agricultural products | 6,780 |
| Total farm-based agricultural shipments | 40,222 |
Note that these preliminary ton-mile estimates (as shown in Table 3) will be refined once regional flows are determined. It is expected that regional flow assignments will provide a more realistic mileage estimate for these shipments. Summing all ton-miles estimated for the sub-state geographic regions should then generate the estimate of national total ton-miles.
4.3. Proposed method for estimating regional flows
Please refer to Report No. 5 Methodology for FAF Regionalization of Selected Out-of-Scope Truck Commodity Flows.4.4. Expected quality of the estimates
Estimates of tons and value are directly computed based on data obtained from the USDA. The expected quality of these estimates is therefore as good as those of the original USDA data. Estimates of ton-miles, however, require the use of VIUS data and assumptions. As pointed out previously, VIUS data have limitations on geographic details, sample coverage, and are subjected to other sampling errors. Mileage estimates produced from this process, therefore, have a higher degree of uncertainly. Consequently, ton-mile estimates for this data gap may be less accurate than those for tons and value.
5. Implications for the Scope and Content of the 2007 CFS
Unless the CFS sample frame is changed to include farms, farm-based agricultural shipments will continue to be a missing component for the 2007 CFS. Because data from the USDA provide reliable and sufficient information (ton and value) to supplement CFS for this specific data gap, it is not necessary for the 2007 CFS to change its sample frame to include farms. Although VIUS-based mileage estimates seem reasonable, it may be beneficial to conduct small-scale surveys to gather information on farm-based shipment distances, especially for SCTG categories 01 (live animal and live fish) and 03 (other agricultural products).
6. Other Issues
None.
7. References
Vachal, Kimberly and Denver Tolliver, Regional Elevator Survey: Grain Transportation and Industry Trends for Great Plains Elevators, Upper Great Plains Transportation Institute, North Dakota State University, August, 2001.
Chin, S. M., J. Hopson, and H. L. Hwang, “Estimating State-Level Truck Activities in America,” Journal of Transportation And Statistics, Volume I, No. 1, pp 63-74, January, 1998.
2002 Vehicle Inventory and Use Survey, Form TC-9502, U.S. Bureau of Census.
2002 Census of Agriculture, Volume 1, Geographic Area Series, Part 51, AC-02-A-51, National Agricultural Statistics Service, USDA, June 2004.
| Item description | Total units | Pound per unit | Total weight (ton) |
|---|---|---|---|
| Live animal & live fish Calves sold (number) | 14,134,147 | 335 | 2,367,470 |
| Live animal & live fish Cattle sold (number) | 59,375,018 | 1,177 | 34,942,198 |
| Live animal & live fish Hogs and pigs sold (number) | 184,997,686 | 256 | 23,679,704 |
| Live animal & live fish Any poultry sold, layers 20 weeks old and older sold | 202,947,490 | 5 | 507,990 |
| Live animal & live fish Any poultry sold, pullet chicks | 174,916,701 | 5 | 420,649 |
| Live animal & live fish Any poultry sold, broilers | 8,500,313,357 | 5 | 20,550,900 |
| Live animal & live fish Any poultry sold, turkeys sold (number) | 283,247,649 | 24 | 3,396,638 |
| Live animal & live fish Sheep and lambs sold (number) | 5,426,904 | 133 | 360,889 |
| Live animal & live fish Horses and ponies, sales (number) | 470,423 | 1,050 | 246,972 |
| Live animal & live fish Mink and their pelts, sales (number) | 2,506,819 | 1 | 627 |
| Live animal & live fish Ducks, sales (number) | 24,143,066 | 6 | 72,429 |
| Live animal & live fish Geese, sales (number) | 200,564 | 15 | 1,504 |
| Live animal & live fish Pigeons or squab, sales (number) | 1,160,364 | 1 | 290 |
| Live animal & live fish Pheasants, sales (number) | 7,206,460 | 4 | 14,413 |
| Live animal & live fish Quail, sales (number) | 19,157,803 | 2 | 19,158 |
| Live animal & live fish Other poultry, sales (number) | 3,143,264 | 4 | 6,287 |
| Live animal & live fish Poultry hatched, sales (number) | 10,186,919,783 | 1 | 3,820,095 |
| Live animal & live fish Mules, burros, and donkeys - sales (number) | 17,385 | 550 | 4,781 |
| Live animal & live fish Goats, total sales (number) | 1,314,310 | 150 | 98,573 |
| Live animal & live fish Rabbits and their pelts -sales (number) | 886,841 | 8 | 3,547 |
| Live animal & live fish Catfish, pounds (1,000) | 608,925 | 1,000 | 304,463 |
| Live animal & live fish Trout, pounds (1,000) | 40,384 | 1,000 | 20,192 |
| Live animal & live fish Hybrid Striped Bass, pounds (1,000) | 1,000 | 0 | |
| Live animal & live fish Other fish, pounds (1,000) | 72,670 | 1,000 | 36,335 |
| Live animal & live fish Crawfish, clam, mussels, oysters, snails, pounds (1,000) | 73,603 | 1,000 | 36,802 |
| Live animal & live fish Other aquaculture products, pounds (1,000) | 33,012 | 1,000 | 16,506 |
| Cereal grains (including seeds) Corn for grain or seed (bushels), harvested | 8,613,061,814 | 70 | 301,457,163 |
| Cereal grains (including seeds) Sorghum for grain or seed (bushels), harvested | 333,485,523 | 56 | 9,337,595 |
| Cereal grains (including seeds) Wheat for grain, total (bushels), harvested | 1,577,005,140 | 60 | 47,310,154 |
| Cereal grains (including seeds) Barley for grain (bushels), harvested | 214,800,035 | 48 | 5,155,201 |
| Cereal grains (including seeds) Buckwheat (bushels), harvested | 960,589 | 48 | 23,054 |
| Cereal grains (including seeds) Canola and other rapeseed (pounds), harvested | 1 | 0 | |
| Cereal grains (including seeds) Canola (pounds), harvested | 1,446,267,120 | 1 | 723,134 |
| Cereal grains (including seeds) Other rapeseed (pounds), harvested | 1,084,170 | 1 | 542 |
| Cereal grains (including seeds) Emmer and spelt (bushels), harvested | 896,203 | 40 | 17,924 |
| Cereal grains (including seeds) Flaxseed (bushels), harvested | 10,738,434 | 56 | 300,676 |
| Cereal grains (including seeds) Mustard seed (pounds), harvested | 94,395,859 | 1 | 47,198 |
| Cereal grains (including seeds) Oats for grain (bushels), harvested | 109,840,449 | 32 | 1,757,447 |
| Cereal grains (including seeds) Popcorn (pounds, shelled), harvested | 945,158,986 | 1 | 472,579 |
| Cereal grains (including seeds) Proso millet (bushels), harvested | 3,810,986 | 54 | 102,897 |
| Cereal grains (including seeds) Rice (hundredweight), harvested | 210,358,014 | 100 | 10,517,901 |
| Cereal grains (including seeds) Rye for grain (bushels), harvested | 7,253,118 | 56 | 203,087 |
| Cereal grains (including seeds) Safflower (pounds), harvested | 270,105,054 | 1 | 135,053 |
| Cereal grains (including seeds) Sunflower seed (pounds), harvested | 2,042,510,240 | 1 | 1,021,255 |
| Cereal grains (including seeds) Triticale (bushels), harvested | 890,690 | 56 | 24,939 |
| Cereal grains (including seeds) Wild rice (cwt), harvested | 285,594 | 100 | 14,280 |
| Cereal grains (including seeds) Cotton (bales), harvested | 17,145,345 | 480 | 4,114,883 |
| Cereal grains (including seeds) Tobacco (pounds), harvested | 873,350,412 | 1 | 436,675 |
| Cereal grains (including seeds) Soybeans for beans (bushels), harvested | 2,707,719,216 | 60 | 81,231,576 |
| Cereal grains (including seeds) Dry edible beans, excluding dry limas (hundredweight) | 29,687,475 | 100 | 1,484,374 |
| Cereal grains (including seeds) Dry limas beans (hundredweight), harvested | 1,072,859 | 100 | 53,643 |
| Cereal grains (including seeds) Dry edible peas (hundredweight), harvested | 4,780,492 | 100 | 239,025 |
| Cereal grains (including seeds) Dry cowpeas and dry southern peas (bushels), harvested | 236,666 | 60 | 7,100 |
| Cereal grains (including seeds) Lentils (hundredweight), harvested | 2,448,940 | 100 | 122,447 |
| Cereal grains (including seeds) Potatoes, excluding sweet potatoes (hundredweight), harvested | 451,405,823 | 100 | 22,570,291 |
| Cereal grains (including seeds) Sweet potatoes (hundredweight), harvested | 13,651,312 | 100 | 682,566 |
| Cereal grains (including seeds) Sugar beets for seed (pounds), harvested | 9,542,593 | 1 | 4,771 |
| Cereal grains (including seeds) Sugar beets for sugar (tons), harvested | 27,793,126 | 2,000 | 27,793,126 |
| Cereal grains (including seeds) Sugarcane for seed (tons), harvested | 1,726,198 | 2,000 | 1,726,198 |
| Cereal grains (including seeds) Sugarcane for sugar (tons), harvested | 35,319,767 | 2,000 | 35,319,767 |
| Cereal grains (including seeds) Peanuts for nuts (pounds), harvested | 3,137,586,781 | 1 | 1,568,793 |
| Cereal grains (including seeds) Alfalfa seed (pounds), harvested | 58,020,460 | 1 | 29,010 |
| Cereal grains (including seeds) Austrian winter peas (hundredweight), harvested | 207,915 | 1 | 104 |
| Cereal grains (including seeds) Bahia grass seed (pounds), harvested | 2,274,519 | 1 | 1,137 |
| Cereal grains (including seeds) Bentgrass seed (pounds), harvested | 4,634,289 | 1 | 2,317 |
| Cereal grains (including seeds) Bermuda grass seed (pounds), harvested | 16,757,215 | 1 | 8,379 |
| Cereal grains (including seeds) Birdsfoot trefoil seed (pounds), harvested | 418,343 | 1 | 209 |
| Cereal grains (including seeds) Bromegrass seed (pounds), harvested | 5,000,215 | 1 | 2,500 |
| Cereal grains (including seeds) Crimson clover seed (pounds), harvested | 2,002,569 | 1 | 1,001 |
| Cereal grains (including seeds) Fescue seed (pounds), harvested | 323,023,498 | 1 | 161,512 |
| Cereal grains (including seeds) Foxtail millet seed (pounds), harvested | 910,125 | 1 | 455 |
| Cereal grains (including seeds) Kentucky Bluegrass seed (pounds), harvested | 76,414,727 | 1 | 38,207 |
| Cereal grains (including seeds) Ladino clover seed (pounds), harvested | 938,510 | 1 | 469 |
| Cereal grains (including seeds) Lespedeza seed (pounds), harvested | 5,413,440 | 1 | 2,707 |
| Cereal grains (including seeds) Orchardgrass seed (pounds), harvested | 18,660,986 | 1 | 9,330 |
| Cereal grains (including seeds) Red clover seed (pounds), harvested | 9,284,591 | 1 | 4,642 |
| Cereal grains (including seeds) Redtop seed (pounds), harvested | 97,292 | 1 | 49 |
| Cereal grains (including seeds) Ryegrass seed (pounds), harvested | 459,929,090 | 1 | 229,965 |
| Cereal grains (including seeds) Sudangrass seed (pounds), harvested | 10,476,796 | 1 | 5,238 |
| Cereal grains (including seeds) Sweetclover seed (pounds), harvested | 30,700 | 1 | 15 |
| Cereal grains (including seeds) Timothy seed (pounds), harvested | 4,310,826 | 1 | 2,155 |
| Cereal grains (including seeds) Vetch seed (pounds), harvested | 956,272 | 1 | 478 |
| Cereal grains (including seeds) Wheatgrass seed (pounds), harvested | 3,268,256 | 1 | 1,634 |
| Cereal grains (including seeds) White clover seed (pounds), harvested | 1,149,776 | 1 | 575 |
| Cereal grains (including seeds) Other seeds (pounds), harvested | 11,582,288 | 1 | 5,791 |
| Cereal grains (including seeds) Hay-alfal, other tame, small grain, wild, grass silage grass (tons) | 137,858,890 | 2,000 | 137,858,890 |
| Cereal grains (including seeds) Corn for silage or green chop (tons, green), harvested | 97,132,738 | 2,000 | 97,132,738 |
| Cereal grains (including seeds) Sorghum for silage or green chop (tons, green), harvested | 3,904,834 | 2,000 | 3,904,834 |
| Other agricultural products Vegetables harvested, harvested (acres) | 3,698,744 | 23,251 | 43,000,242 |
| Other agricultural products Fruits Total Production in 1,000 tons | 33,456 | 2,000,000 | 33,456,000 |
| Other agricultural products Dill for oil (pounds), harvested | 117,271 | 1 | 59 |
| Other agricultural products Ginger root (pounds), harvested | 5,330,284 | 1 | 2,665 |
| Other agricultural products Ginseng (pounds), harvested | 963,768 | 1 | 482 |
| Other agricultural products Guar (pounds), harvested | 13,963,533 | 1 | 6,982 |
| Other agricultural products Sesame (pounds) | 1,358,364 | 1 | 679 |
| Other agricultural products Herbs, dried (pounds), harvested | 3,473,232 | 1 | 1,737 |
| Other agricultural products Hops (pounds), harvested | 58,575,519 | 1 | 29,288 |
| Other agricultural products Jojoba harvested (pounds), harvested | 88,578 | 1 | 44 |
| Other agricultural products Mint for oil (pounds of oil), harvested | 9,919,641 | 1 | 4,960 |
| Other agricultural products Mungbeans for beans (pounds), harvested | 973,166 | 1 | 487 |
| Other agricultural products Pineapples harvested (tons), harvested | 314,626 | 2,000 | 314,626 |
| Other agricultural products Salt hay (tons), harvested | 1,396 | 2,000 | 1,396 |
| Other agricultural products Sorghum for syrup (pounds), harvested | 1,125,201 | 1 | 563 |
| Other agricultural products Sweet corn for seed (pounds), harvested | 9,065,451 | 1 | 4,533 |
| Other agricultural products Taro (pounds), harvested | 4,564,494 | 1 | 2,282 |
| Other agricultural products Sweet rice (cwt) harvested | 1,057,875 | 100 | 52,894 |
| Other agricultural products Sheep and lambs shorn (pounds of wool) | 39,798,847 | 1 | 19,899 |
| Other agricultural products Honey, sales (pounds) | 134,551,490 | 1 | 67,276 |
| Other agricultural products Milk and milk fat (million pounds) | 176,012 | 1,000,000 | 88,006,000 |
| Other agricultural products Mohair, sales (pounds) | 2,416,376 | 1 | 1,208 |
| TOTAL Tons | 1,051,285,368 |
2 A personal communication with Kimberly Vachal of the UGPTI at the North Dakota State University also concluded that these assumptions are realistic and reasonable.
3 Home base state in VIUS refers to “the location where the vehicle was usually parked when not on the road, such as a home, farm, terminal, etc.” See item H of Form TC-9502, 2002 Economic Census, Vehicle Inventory and Use Survey.
4 Personal communication with Mr. Bill Weaver of the Livestock Division staff in the NASS/USDA.
5 The definition of a farm in the Census of Agriculture is “any place from which $1,000 or more of agricultural products were produced or sold, or normally would have been sold, during the census year.”
6 The “Market value of agricultural products sold” category represents gross market value before taxes and production expenses of all agricultural products sold or removed from the place in 2002, regardless of who received the payment. It is equivalent to total sales. Appendix A, Volume 1, Geographic Area Series, Part 51, AC-02-A-51, 2002 Census of Agriculture, National Agricultural Statistics Service, USDA, June 2004.
7 See http://www.ops.fhwa.dot.gov/freight/freight_analysis/faf/index.htm for further information.
8 Chin, S. M., J. Hopson, and H. L. Hwang, “Estimating State-Level Truck Activities in America,” Journal of Transportation And Statistics, Volume I, No. 1, pp 63-74, January, 1998.