A. Apatite
B. Calcite
C. Dolomite
D. Gypsum
A. Balance use of NPK fertilizers according to the need of crops.
B. Following proper crop rotation (shallow rooted and deep root crops) in the cropg session.
C. Regular use of FYM, Composts, acidic mulches, Green manures and Organic fertilizers to increase OM content of Soil.
D. All of the above
A. Spectrophotometer
B. Boiling
C. X-ray diffraction
D. Breaking
A. Sedimentary rocks
B. Secondary rocks
C. Aqueous rocks
D. All of the above
A. Low acid foods
B. Acid foods
C. Medium acid foods
D. High acid foods
A. 1% or less of soil volume
B. 10% or less of soil volume
C. 20% or less of soil volume
D. 30% or less of soil volume