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A.Quantity of irrigation water
B.Depth of irrigation water
C.Quality of irrigation water
D.None of the above
Zn, Fe, Cu, B, Mn and Mo are called micronutrient, because they are:
A.Nutrients of microscopic significance
B.Nutrients, which produce microscopic effects
C.Nutrients that is required in minute qualities
D.Nutrients required by micro-organisms
Ca Al2 Si3 O8 is the formula of:
A.Anorthite
B.Illite
C.Montmorillonite
D.Albite
Calcite, Dolomite and Hornblends are:
A.Calcium minerals
B.Potassium minerals
C.Sulphur minerals
D.None of these
Blue-green algae grows best in:
A.Upland rice
B.Jute
C.Lowland rice
D.Sorghum
Bone meal is well suited for:
A.Alkaline soil
B.Neutral soil
C.Acidic soils
D.All of these
Bray suggested certain modification in the Mischerlich equation:
A.dy/dx = (A – Y)C
B.A = B (1 – Y)/Y
C.Log (A – Y) = log A – CX
D.Log (A – Y) = log A – C1 b – CX