Search results
Results From The WOW.Com Content Network
Yields could be stabilized at around 1.6 tons per hectare by supplementing irrigation water if rainwater was lacking during the plant establishment and reproductive stages. Applying irrigation water throughout the whole season (full irrigation) reduced the water productivity. Also in viticulture and fruit tree cultivation, DI is practiced. [10]
Scholars Mt. Pleasant and Burt reproduced Iroquois methods of cultivation with Iroquoian varieties of maize at several locations in New York. They reported maize yields of 22 to 76 bushels per acre (1.4 to 4.8 tonnes per hectare). Soil fertility and weather were the main determinants of yield. [14] Mt.
Field Water Efficiency (%) = (Water Transpired by Crop ÷ Water Applied to Field) x 100; Increased irrigation efficiency has a number of positive outcomes for the farmer, the community and the wider environment. Low application efficiency infers that the amount of water applied to the field is in excess of the crop or field requirements.
Irrigation schemes in the world use about 3 500 km 3 water per year, of which 74% is evaporated by the crops. [7] This is some 80% of all water used by mankind (4 400 km 3 per year). The water used for irrigation is roughly 25% of the annually available water resources (14 000 km 3) and 9% of all annual river discharges in the hydrological cycle.
English: :Water requirement per tonne of food product Global average water footprint of food production, which includes water requirements across its full supply chain and the quantity of freshwater pollution as a result of production.
A maize crop yielding 6–9 tonnes of grain per hectare (2.5 acres) requires 31–50 kilograms (68–110 lb) of phosphate fertilizer to be applied; soybean crops require about half, 20–25 kg per hectare. [21] Yara International is the world's largest producer of nitrogen-based fertilizers. [22]
Water stress is the most ubiquitous stress factor, often denoted as K w. Stress coefficients tend to be functions ranging between 0 and 1. The simplest are linear, but thresholds are appropriate for some toxicity responses. Crop coefficients can exceed 1 when the crop evapotranspiration exceeds that of RET.
45% of Tanzanian land is used for maize cultivation in which 4.5 million of households utilize their land for maize cultivation. [3] The contribution of smallholders is 85% of the total national cultivation with the rest of contribution being from community farms and large farms (private and public) [1] Cultivation of maize is conducted in two different rainfall seasons of the year, which are: