Water Management in Horticultural Crops (1+1)

Definition-Water requirement

• Water requirement may be defined as the quantity of water, regardless of its source, required by a crop or diversified pattern of crops in a given period of time for its normal growth under field conditions at a place.
• Water requirement, includes the losses due to ET (or CU) plus the losses during the application of irrigation water and the quantity of water required for special operations such as land preparation. It may be formulated as follows:
  
  WR= ET or CU + application losses + special needs.
• Based on the sources of water supply to meet the water requirement, numerically it is represented as, WR=IR+ER+S i.e., Irrigation water (IR), effective rainfall (ER) and soil profile contribution (S).