After reading this article you will learn about:- 1. Soil Moisture Constants 2. Measurement of Soil Moisture 3. Loss. Soil Moisture Constants: (i) Field capacity is the amount of moisture held by the soil after the excess gravitational water has drained away. Negative potential or free energy of soil water is 0.1 to 0.3 bars. Approximate of value is 2.54. [...]
After reading this article you will learn about the quality of irrigation water and factors affecting it. Quality of Irrigation Water: Whatever may be the source of irrigation water viz. river, canal, tank, open well or tube- well, some soluble salts are always dissolved in it. The main soluble constituent in water is Ca, Mg, Na and K as cations [...]
After reading this article you will learn about the management and use of poor quality water. Management of Poor Quality Water: 1. Application of greater amounts of organic matter such as FYM, compost etc., to the soil to improve permeability and structure. 2. Increasing the proportion of calcium, through addition of gypsum (CaSO4) to the irrigation water in the channel, [...]