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In agriculture, the yield is a measurement of the amount of a crop grown, or product such as wool, meat or milk produced, per unit area of land. The seed ratio is another way of calculating yields. Cereal yield in tons per hectare and kilograms of nitrogenous fertilizer applied per hectare of cropland.
Poor years, however, might see yields drop to less than 4 bushels per acre. [47] Yields in the 21st century, by contrast, can range upwards to 60 bushels per acre. [55] The yields in England were probably typical for Europe in the Middle Ages. Scholars have often criticized medieval agriculture for its inefficiency and low productivity.
Paddy fields are a major source of atmospheric methane which contributes to global warming, having been estimated to contribute in the range of 50 to 100 million tonnes of the gas per annum. [ 50 ] [ 51 ] Studies have shown that this can be significantly reduced while also boosting crop yield by draining the paddies to allow the soil to aerate ...
For example, average yields of corn (maize) in the US have increased from around 2.5 tons per hectare (t/ha) (40 bushels per acre) in 1900 to about 9.4 t/ha (150 bushels per acre) in 2001. Similarly, worldwide average wheat yields have increased from less than 1 t/ha in 1900 to more than 2.5 t/ha in 1990.
Rice production by country (2019) This is a list of countries by rice production in 2022 based on the Food and Agriculture Organization Corporate Statistical Database. The total world rice production for 2022 was 776,461,457 [1] metric tonnes. In 1961, the total world production was 216 million tonnes.
Food production per capita since 1961 Grain silos Rice plantation in Thailand Cambodians planting rice, 2004. Agricultural productivity is measured as the ratio of agricultural outputs to inputs. [1] While individual products are usually measured by weight, which is known as crop yield, varying products make measuring overall agricultural ...
In 1989 they cultivated only 3.8 percent of arable land and contributed 3.9 percent of gross production. In the 1980s, grain yields and meat output per hectare/per acre were higher in the socialist sector than in the private sector. An important factor in this difference was the more intensive use of fertilizers in state farms. On the other ...
The average yield from the Krasnodar region was between 4 and 5 tonnes per ha, while the Russian average was only 2t/ha. [18] The Basic Element Group, a conglomerate owned by Oleg Deripaska, is one of Russia's leading agricultural producers, and owns or manages 109,000ha of Russian farmland, out of 90m actual and 115m total (0.12% actual). [18]