Radiation methods in soil physics problems with special reference to soil water, salts and nutrients movement studies

A brief review of some recent developments in the uses of different isotopes and radiation techniques for studies of measurement of soil water content and simultaneous movement of water, salts and nutrient ions in soil is presented. Experimental work using radiotracers to study relative importance of convection and diffusion on the movement of different ions to plant roots and its availability to plants has also been discussed. (author)