Application of isotope techniques in research into the chemistry and availability of plant nutrients

by 39486 (eds.), 69204 FRIED, M., 94670 MISTRY, K.B., 95255 Mongi, H.O., 79380 Huxley, P.A., 9447 ICRAF, Nairobi (Kenia), 35346 Expert Consultation on Soils Research in Agroforestry, Nairobi (Kenia), 26-30 Mar 1979