UNIT-IV
NECESSITY AND IMPORTANCE OF IRRIGATION,
ADVANTAGES AND ILL EFFECTS OF IRRIGATION,
TYPES OF IRRIGATION, METHODS OF APPLICATION
OF IRRIGATION WATER, INDIAN AGRICULTURAL
SOILS, METHODS OF IMPROVING SOIL FERTILITY –
CROP ROATION, PREPARATION OF LAND
FOR IRRIGATION, STANDARDS OF QUALITY FOR
IRRIGATION WATER.
SOIL-WATER-PLANT RELATIONSHIP, VERTICAL
DISTRIBUTION OF SOIL MOISTURE, SOIL MOISTURE
CONSTANTS, SOIL MOISTURE TENSION,
CONSUMPTIVE USE, DUTY AND DELTA, FACTORS
AFFECTING DUTY- DESIGN DISCHARGE FOR A
WATER COURSE. DEPTH AND FREQUENCY OF
IRRIGATION, IRRIGATION EFFICIENCIES-WATER
LOGGING