By US Department of Agriculture
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Complete, updated assurance of the fundamentals of soil chemistry. even if just a meter intensive over the earth's floor, soil is essential to maintaining life-affecting air and water caliber, the expansion of vegetation and plants, and the overall healthiness of the total planet. The advanced interaction between natural and inorganic solids, air, water, microorganisms, and plant roots in soil is the topic of Soil Chemistry, a reference pivotal to knowing soil approaches and difficulties.
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Extra info for Agriculture Fact Book 1999 (Agriculture Factbook, 1999)
S. cropland, 1974-98 Million acres 500 Cropland harvested Summer fallow Crop failure Idled acres 400 300 200 100 0 1974 1 25 76 78 80 82 84 86 88 90 92 94 96 981 preliminary. 25 99 02 Production Agri. F 8/16/00 2:18 PM Page 26 Figure 2-3. Acreage harvested of specified crops, 1974-981 Million bushels 400 350 300 All other 250 200 150 Corn2 Soybeans 100 Wheat Cotton 50 0 1974 1Includes 76 78 80 the 48 conterminous States. and sorghum for grain. 3Preliminary. 2Corn 26 82 84 86 Sorghum2 88 90 Oats2 92 Barley 94 96 983 99 03 Farm Sector F 3.
The percentage of the retail price accounted for by the farm value varies widely among foods. Generally, it is larger for animal products than for crop-based foods, and smaller for foods that require considerable processing and packaging. The percentage generally decreases as the degree of processing increases. For example, the farm value of meat was 30 percent in 1998, while cereal and bakery products I 16 99 01 Linking Consumers F 8/16/00 2:16 PM Page 17 had a farm value averaging only 6 percent.
T 24 99 02 Production Agri. 2 million acres in 1985, largely as the result of Federal acreage reduction programs. The PIK program idled nearly 22 million acres of corn acreage in 1983. 2 million acres in 1988. The PIK program removed about 18 million acres of wheat base from production in 1983. Barley and oat acreage harvested have been declining since the early 1970’s. Acreage has tended to shift out barley and oats to the more profitable crops. Soybean acreage harvested has fluctuated as the relative prices of soybeans and corn changed and as prices for soybeans in the world market were more or less favorable.
Agriculture Fact Book 1999 (Agriculture Factbook, 1999) by US Department of Agriculture