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The gross nutrient balances (N and P) are calculated as the difference between the total quantity of nutrient inputs entering an agricultural system (mainly fertilizers, livestock manure), and the quantity of nutrient outputs leaving the system (mainly uptake of nutrients by crops and grassland). Gross nutrient balances are expressed in tonnes of nutrient surplus (when positive) or deficit (when negative). This calculation can be used as a proxy to reveal the status of environmental pressures, such as declining soil fertility in the case of a nutrient deficit, or for a nutrient surplus the risk of polluting soil, water and air. The nutrient balance indicator is also expressed in terms of kilogrammes of nutrient surplus per hectare of agricultural land to facilitate the comparison of the relative intensity of nutrients in agricultural systems between countries.

AQUASTAT is FAO's global information system on water and agriculture, developed by the Land and Water Division. The main mandate of the program is to collect, analyze and disseminate information on water resources, water uses, and agricultural water management with an emphasis on countries in Africa, Asia, Latin America and the Caribbean. This allows interested users to find comprehensive and regularly updated information at global, regional, and national levels.

All India level Gross Area under Irrigation by Sources and Crop

Share of irrigable and irrigated areas in the utilised agricultural area (UAA); the irrigable area is the area which is equipped for irrigation, while the irrigated area measures the actual amount of land irrigated; based on Farm Structure Survey data.

Title: Gross Area Under Irrigation by Crops   Description: The data refers to All India (2000-01 to 2009-10) and State-wise (2008-09 to 2009-10) data on gross area under irrigation by crops such as Rice, Jowar, Bajra, Maize, Ragi, Wheat, Barley, Cereals, Millets, Pulses, Food Grains, Sugarcane, Fruits, Vegetables, Cotton, Tobacco, Fodder Crops, etc.   Released Under: National Data Sharing and Accessibility Policy (NDSAP)   Contributor: Ministry of Statistics and Programme Implementation   Keywords: bajra; barley; cereals; cotton; irrigation; Jowar; maize; ragi; rice; Sugarcane; Tobacco; wheat; Fodder; Foodgrain; Fruit; Millet; Pulse; Vegetable   Group: Irrigation   Sectors: Statistics; Irrigation; Agriculture   Note: NA: Not Available; Data figures are in 000 Hectares; Total may not tally due to rounding off of the figures; 0 relates to the area below 500 hectares; For Gujarat, Himachal Pradesh, Maharastra, Manipur, Sikkim, Tripura, Uttar Pradesh, West Bengal, A& N Island, Chandhigarh, Lakshadweep have Estimated or repeated; Source: Directorate of Economics and Statistics, Ministry of Agriculture and Farmars Welfare and also published in statistical year book 2017 by MOSPI.