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. [...]
This article throws light upon the ten main criterions for the evaluation of irrigation water. The criterions are: 1. Salinity Hazard or Total Soluble Salt Concentration 2. Sodium Hazard 3. Salt Index 4. Bicarbonate Hazard 5. Boron Concentration 6. Chloride Concentration 7. Soluble Sodium Percentage 8. Magnesium Hazard 9. Nitrate Concentration 10. Lithium. Criteria # 1. Salinity Hazard or Total [...]
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 [...]