A scanning electron microscope was used to study the effects of different amendments such as farm yard manure (FYM), pyrites and gypsum on the structure of two salt affected soils from Delhi and South Gujarat. Results indicate that gypsum was more effective in improving soil physical conditions than either pyrites or FYM.
S. Raman, Dr. Madhu Mohan N., Goswami, N. N., and , “Scanning electron microscopic studies on the structure of salt affected soils treated with various amendments.”, Journal of the Indian Society of Soil Science, vol. 38, pp. 709–712, 1990.