Yonny, Robert J. V.
International training course in soil and plant analysis : report on studies undertaken during the six-month course in soil and plant analysis / by Robert J. V. Yonny. - Amsterdam, The Netherlands : Royal Tropical Institute, 1986. - 19 p.
plants--Analysis.
Soils--Analysis.
International training course in soil and plant analysis : report on studies undertaken during the six-month course in soil and plant analysis / by Robert J. V. Yonny. - Amsterdam, The Netherlands : Royal Tropical Institute, 1986. - 19 p.
plants--Analysis.
Soils--Analysis.