ABSTRACT
Everywhere in the world, water supply and irrigation are fundamental to agricultural production. The main aim of water supply in arable land and plantations is to:
Ensure the elementary conditions of production using water
Increase the quantity of yield
Increase the quality of yield
Realize other technological elements through irrigation (e.g. fertilization, plant protection).
The quantity of water needed for irrigation of a given land area depends on a number of factors, the most important of which are (Goswami, 1986):Nature of the crop and crop growth cycle
Climatic conditions
Type and condition of soil
Land topography
Field application efficiency
Water quality.
The added water demand usually changes over time depending on rainfall, evapotranspiration and the actual water demand of the crop.