How to make sure there is a notable reduction in crop production expenses. crops with the highest water requirements.
Rice: A kilogram of rice requires 3,000 to 5,000 gallons of water in traditional farming. Flooded soil is necessary for the crop’s growth since it inhibits the growth of weeds and improves soil nutrient uptake for higher yields. West Bengal, Uttar Pradesh, Andhra Pradesh, Punjab, Bihar, Odisha, Chhattisgarh, Assam, Tamil Nadu, and Haryana are among the Indian states where it is grown.
Cotton is a Kharif crop and is sometimes referred to as “white gold.” One of the biggest manufacturers and exporters of cotton yarn is India. In India, 22,500 gallons of water are required for each kilogram of cotton produced. Most Indian cotton is grown in drier regions.. Gujarat, Maharashtra, Andhra Pradesh, Haryana, Madhya Pradesh, Punjab, Rajasthan, Karnataka, Tamil Nadu, and Odisha are the states that grow this crop the most.
A kilogram of sugarcane requires between 1500 and 3000 gallons of water!The main producers of this crop in India include Uttar Pradesh, Maharashtra, Karnataka, Tamil Nadu, Andhra Pradesh, Bihar, Gujarat, Haryana, Uttarakhand, and Punjab.
For every kilogram of produce, soy takes about 900 liters of water.
Wheat: One kilogram of wheat requires 900 liters of water. The northern Indian states of Uttar Pradesh, Punjab, Madhya Pradesh, Haryana, Rajasthan, Bihar, Gujarat, Maharashtra, West Bengal, and Uttarakhand are the leading producers of this crop.
A kilogram of sugarcane needs 1500–3000 liters of water! In India, Uttar Pradesh, Maharashtra, Karnataka, Tamil Nadu, Andhra Pradesh, Bihar, Gujarat, Haryana, Uttarakhand, and Punjab are the top producers of this crop.
For every kilogram of produce, soy consumes around 900 liters of water.
Wheat: 900 gallons of water are needed to produce one kilogram of wheat. The top producers of this crop are the northern Indian states of Uttar Pradesh, Punjab, Madhya Pradesh, Haryana, Rajasthan, Bihar, Gujarat, Maharashtra, West Bengal, and Uttarakhand.
water requirements of various crops;
It is recommended that irrigation projects be planned and run using this idea of effective rainfall. Effective rainfall is influenced by a number of variables, such as rainfall parameters, land topography, crop and soil properties, management techniques, carryover moisture content, and groundwater contribution. A number of strategies are in usage for determining effective rainfall. These include the empirical relationship (SCS method), the drum culture approach for rice, and the field water balance approach. The table lists the various crops’ water requirements.
| Crop | Water Requirements in mm | Crop | Water Requirements in mm |
| Rice | 1200 | Tomato | 600-800 |
| Wheat | 450-650 | Potato | 500-700 |
| Sorghum | 450-650 | Pea | 350-500 |
| Maize | 500-800 | Onion | 350-550 |
| Sugarcane | 1500-2500 | Chillies | 400-600 |
| Sugarbeet | 550-750 | Cabbage | 380-500 |
| Ground nut | 500-700 | Banana | 1200-2200 |
| Cotton | 700-1300 | Citrus | 900-1200 |
| Soybean | 450-700 | Grapes | 700-1200 |
| Tobacco | 400-600 | Mango | 1000-1200 |
| Bean | 300-500 | Turmeric | 1200-1400 |
How do we Calculate Crop Water Requirement?
The total quantity of water required by a crop, irrespective of its source, in a given period of time for its normal growth and development under field conditions at a given place. In means that it is the total quantity of water required to mature an adequately irrigated crop to meet the losses due to evapotranspiration (ET), plus the losses during the application of irrigation water (unavoidable losses) and the additional quantity of water required for special operations such as land preparation, transplanting, leaching of salts below the crop root zone, frost control etc. It is expressed in depth per unit time.
Crop water requirement is the total water demand for growing a crop. Crop water demand can also be expressed in terms of supply as:
WR = IRR + ER +ΔS +GWC
Where:
WR = Total depth of water required during the life of the crop, irrespective of source
CU = Consumptive use (total water required for all plant processes)
ER = Effective rainfall received during crop life
ΔS = Profile water use, i.e., difference in soil moisture in the crop root zone at the beginning and end of the crop
GWC = Groundwater contribution, if any
IRR = Irrigation