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[40] [49] Fertilizer consumption has surpassed the amount of farmland in the United States. [47] Data on the fertilizer consumption per hectare arable land in 2012 are published by The World Bank. [50] The diagram below shows fertilizer consumption by the European Union (EU) countries as kilograms per hectare (pounds per acre).
Oct. 6—Due to increasing natural gas prices, nitrogen fertilizer prices are relatively high compared to recent years and are expected to remain high and possibly increase through next spring ...
A 15-ton crop of onions uses up to 19 lb of sulfur and 4 tons of alfalfa uses 15 lb per acre. Sulfur abundance varies with depth. In a sample of soils in Ohio, United States, the sulfur abundance varied with depths, 0–6 inches, 6–12 inches, 12–18 inches, 18–24 inches in the amounts: 1056, 830, 686, 528 lb per acre respectively. [98]
May 8—W ith high energy prices and Russian embargos pushing up fertilizer costs, New Hampshire farmers are returning to a homegrown nutrient source — sludge generated from wastewater treatment ...
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The units by which the yield of a crop is usually measured today are kilograms per hectare or bushels per acre. Long-term cereal yields in the United Kingdom were some 500 kg/ha in Medieval times, jumping to 2000 kg/ha in the Industrial Revolution, and jumping again to 8000 kg/ha in the Green Revolution . [ 1 ]
Depending on the species of cover crop grown, the amount of nitrogen released into the soil lies between 40 and 200 pounds per acre. With green manure use, the amount of nitrogen that is available to the succeeding crop is usually in the range of 40-60% of the total amount of nitrogen that is contained within the green manure crop. [5]
The early product had 60 percent of the total nitrogen cold-water-insoluble, and the unreacted (quick-release) less than 15%. Methylene ureas, e.g. methylene diurea, were commercialized in the 1960s and 1970s, having 25% and 60% of the nitrogen as cold-water-insoluble, and unreacted urea nitrogen in the range of 15% to 30%.
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