Factors affecting eavpo-transpiration (ET)

Factors affecting evapo-transpiration (ET)
    Climatic factors
    • Radiation, precipitation, relative humidity, temperature and wind.
    Soil factors
    • Soil factors such as texture, hydraulic conductivity, water holding capacity, crop residues on the soil surface, colour and rough surface of the soil affects the ET.
    Plant factors
    • Plant morphology, crop, variety, crop geometry, extent of plant cover, stomatal density, duration of the crop, rooting characteristics, growth phase, crop growing season, etc.
    Cultural practices
    • Weed control is necessary to reduce the water loss through transpiration by weeds.
    • Fertilizer application increases the ET and CU by producing greater biomass and developing a deeper and extensive root system.
    • However, the CU does not vary widely between well-fertilized and under-fertilized crops.
    • Mulching reduces the ET by reducing the evaporation from the bare soil, reflecting the solar radiation and reducing the weed infestation.
    • Mulching has a greater effect in reducing the ET when the crop cover is relatively small.

Last modified: Saturday, 23 June 2012, 4:11 AM