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To estimate the pressure of irrigation on the available water resources, an assessment has to be made both of irrigation water requirement and of irrigation water withdrawal. Irrigation water requirement depends on the crop water requirement and the water naturally available to the crops (effective precipitation, soil moisture, etc.). (...) In this review, the model’s inputs are AQUASTAT data related to the corresponding irrigated crops: areas of harvested irrigated crops, cropping patterns and cropping intensity, converted into irrigated crop calendars. (...) The review consists in a 3-step methodology (summarized in Figure 1 below): Preparation of irrigated crop calendars by country Irrigated crop calendars by country Regional summary of the irrigated crop calendars Calculation of irrigation water requirement , calculated by the model by comparing: The water balance under non-irrigated conditions, corresponding to the actual evapotranspiration under non-irrigated conditions and calculated using available climatic datasets; and The crop water requirement based on the irrigated crop calendars and the global map of irrigation areas.
Language:English
Score: 1081478.1 - https://www.fao.org/aquastat/a...data-analysis/irrig-water-use/
Data Source: un
To estimate the pressure of irrigation on the available water resources, an assessment has to be made both of irrigation water requirement and of irrigation water withdrawal. Irrigation water requirement depends on the crop water requirement and the water naturally available to the crops (effective precipitation, soil moisture, etc.). (...) In this review, the model’s inputs are AQUASTAT data related to the corresponding irrigated crops: areas of harvested irrigated crops, cropping patterns and cropping intensity, converted into irrigated crop calendars. (...) The review consists in a 3-step methodology (summarized in Figure 1 below): Preparation of irrigated crop calendars by country Irrigated crop calendars by country Regional summary of the irrigated crop calendars Calculation of irrigation water requirement , calculated by the model by comparing: The water balance under non-irrigated conditions, corresponding to the actual evapotranspiration under non-irrigated conditions and calculated using available climatic datasets; and The crop water requirement based on the irrigated crop calendars and the global map of irrigation areas.
Language:English
Score: 1081478.1 - https://www.fao.org/aquastat/e...data-analysis/irrig-water-use/
Data Source: un
To estimate the pressure of irrigation on the available water resources, an assessment has to be made both of irrigation water requirement and of irrigation water withdrawal. Irrigation water requirement depends on the crop water requirement and the water naturally available to the crops (effective precipitation, soil moisture, etc.). (...) In this review, the model’s inputs are AQUASTAT data related to the corresponding irrigated crops: areas of harvested irrigated crops, cropping patterns and cropping intensity, converted into irrigated crop calendars. (...) The review consists in a 3-step methodology (summarized in Figure 1 below): Preparation of irrigated crop calendars by country Irrigated crop calendars by country Regional summary of the irrigated crop calendars Calculation of irrigation water requirement , calculated by the model by comparing: The water balance under non-irrigated conditions, corresponding to the actual evapotranspiration under non-irrigated conditions and calculated using available climatic datasets; and The crop water requirement based on the irrigated crop calendars and the global map of irrigation areas.
Language:English
Score: 1081478.1 - https://www.fao.org/aquastat/r...data-analysis/irrig-water-use/
Data Source: un
The model requires the following crop characteristics: Length of growth cycle (days from emergence to full maturity); length of yield formation period; maximum rate of photosynthesis at prevailing temperatures, leaf area index at maximum growth rate; harvest index; crop adaptability group; sensitivity of crop growth cycle length to heat provision; development stage specific crop water requirements, and coefficients of crop yield response to water stress. (...) Soil suitability classifications are based on knowledge of crop requirements, of prevailing soil conditions, and of applied soil management. In other words, soil suitability procedures quantify to what extent soil conditions match crop requirements under defined input and management circumstances.
Language:English
Score: 1077959.6 - https://www.fao.org/nr/gaez/ab...ility-and-potential-yields/it/
Data Source: un
The model requires the following crop characteristics: Length of growth cycle (days from emergence to full maturity); length of yield formation period; maximum rate of photosynthesis at prevailing temperatures, leaf area index at maximum growth rate; harvest index; crop adaptability group; sensitivity of crop growth cycle length to heat provision; development stage specific crop water requirements, and coefficients of crop yield response to water stress. (...) Soil suitability classifications are based on knowledge of crop requirements, of prevailing soil conditions, and of applied soil management. In other words, soil suitability procedures quantify to what extent soil conditions match crop requirements under defined input and management circumstances.
Language:English
Score: 1077959.6 - https://www.fao.org/nr/gaez/ab...ility-and-potential-yields/en/
Data Source: un
The length of the growing period varies with climate but in general 130 to 175 days are required from sowing to harvest. The crop is usually sown in the nursery and transplanted after 30 to 35 days. (...) Depletion Coefficient, p - - - - 0.3 Root Depth, m - - - - 0.6 Crop Coefficient, Kc 0.7 >> 1.05 0.75 - Yield Response Factor, Ky 0.45 - 0.8 0.3 1.1 Onion - Green Stage length, days 25 20 30 30 45 55 10 20 55 5 10 40 70 95 180 April October March  Mediterranean  Arid Region Calif., USA Depletion Coefficient, p - - - - 0.3   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.0 1.0 -   Onion - Seed Stage length, days 20 45 165 45 275 September Calif., Desert, USA Depletion Coefficient, p - - - - 0.35   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.05 0.8 -   Water Requirements Water Requirements For optimum yield, onion requires 350 to 550 mm water. (...) Irrigation Scheduling Irrigation Scheduling The crop requires frequent, light irrigations which are timed when about 25 percent of available water in the first 0.3 m soil depth has been depleted by the crop.
Language:English
Score: 1076917.9 - https://www.fao.org/land-water...are/crop-information/onion/ar/
Data Source: un
The length of the growing period varies with climate but in general 130 to 175 days are required from sowing to harvest. The crop is usually sown in the nursery and transplanted after 30 to 35 days. (...) Depletion Coefficient, p - - - - 0.3 Root Depth, m - - - - 0.6 Crop Coefficient, Kc 0.7 >> 1.05 0.75 - Yield Response Factor, Ky 0.45 - 0.8 0.3 1.1 Onion - Green Stage length, days 25 20 30 30 45 55 10 20 55 5 10 40 70 95 180 April October March  Mediterranean  Arid Region Calif., USA Depletion Coefficient, p - - - - 0.3   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.0 1.0 -   Onion - Seed Stage length, days 20 45 165 45 275 September Calif., Desert, USA Depletion Coefficient, p - - - - 0.35   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.05 0.8 -   Water Requirements Water Requirements For optimum yield, onion requires 350 to 550 mm water. (...) Irrigation Scheduling Irrigation Scheduling The crop requires frequent, light irrigations which are timed when about 25 percent of available water in the first 0.3 m soil depth has been depleted by the crop.
Language:English
Score: 1076917.9 - https://www.fao.org/land-water...are/crop-information/onion/en/
Data Source: un
The length of the growing period varies with climate but in general 130 to 175 days are required from sowing to harvest. The crop is usually sown in the nursery and transplanted after 30 to 35 days. (...) Depletion Coefficient, p - - - - 0.3 Root Depth, m - - - - 0.6 Crop Coefficient, Kc 0.7 >> 1.05 0.75 - Yield Response Factor, Ky 0.45 - 0.8 0.3 1.1 Onion - Green Stage length, days 25 20 30 30 45 55 10 20 55 5 10 40 70 95 180 April October March  Mediterranean  Arid Region Calif., USA Depletion Coefficient, p - - - - 0.3   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.0 1.0 -   Onion - Seed Stage length, days 20 45 165 45 275 September Calif., Desert, USA Depletion Coefficient, p - - - - 0.35   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.05 0.8 -   Water Requirements Water Requirements For optimum yield, onion requires 350 to 550 mm water. (...) Irrigation Scheduling Irrigation Scheduling The crop requires frequent, light irrigations which are timed when about 25 percent of available water in the first 0.3 m soil depth has been depleted by the crop.
Language:English
Score: 1076917.9 - https://www.fao.org/land-water...are/crop-information/onion/ru/
Data Source: un
The length of the growing period varies with climate but in general 130 to 175 days are required from sowing to harvest. The crop is usually sown in the nursery and transplanted after 30 to 35 days. (...) Depletion Coefficient, p - - - - 0.3 Root Depth, m - - - - 0.6 Crop Coefficient, Kc 0.7 >> 1.05 0.75 - Yield Response Factor, Ky 0.45 - 0.8 0.3 1.1 Onion - Green Stage length, days 25 20 30 30 45 55 10 20 55 5 10 40 70 95 180 April October March  Mediterranean  Arid Region Calif., USA Depletion Coefficient, p - - - - 0.3   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.0 1.0 -   Onion - Seed Stage length, days 20 45 165 45 275 September Calif., Desert, USA Depletion Coefficient, p - - - - 0.35   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.05 0.8 -   Water Requirements Water Requirements For optimum yield, onion requires 350 to 550 mm water. (...) Irrigation Scheduling Irrigation Scheduling The crop requires frequent, light irrigations which are timed when about 25 percent of available water in the first 0.3 m soil depth has been depleted by the crop.
Language:English
Score: 1076917.9 - https://www.fao.org/land-water...are/crop-information/onion/es/
Data Source: un
The length of the growing period varies with climate but in general 130 to 175 days are required from sowing to harvest. The crop is usually sown in the nursery and transplanted after 30 to 35 days. (...) Depletion Coefficient, p - - - - 0.3 Root Depth, m - - - - 0.6 Crop Coefficient, Kc 0.7 >> 1.05 0.75 - Yield Response Factor, Ky 0.45 - 0.8 0.3 1.1 Onion - Green Stage length, days 25 20 30 30 45 55 10 20 55 5 10 40 70 95 180 April October March  Mediterranean  Arid Region Calif., USA Depletion Coefficient, p - - - - 0.3   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.0 1.0 -   Onion - Seed Stage length, days 20 45 165 45 275 September Calif., Desert, USA Depletion Coefficient, p - - - - 0.35   Root Depth, m - - - - 0.6   Crop Coefficient, Kc 0.7 >> 1.05 0.8 -   Water Requirements Water Requirements For optimum yield, onion requires 350 to 550 mm water. (...) Irrigation Scheduling Irrigation Scheduling The crop requires frequent, light irrigations which are timed when about 25 percent of available water in the first 0.3 m soil depth has been depleted by the crop.
Language:English
Score: 1076917.9 - https://www.fao.org/land-water...are/crop-information/onion/fr/
Data Source: un