-
141
-
142
Rice fertilization a six-year isotope study on nitrogen and phosphorus fertilizer utilization
Gepubliceerd in 1970Boek -
143
-
144
Technical and economic evaluation of fertilizer intermediates for use by developing countries.
Gepubliceerd in 1970Boek -
145
Influence of nitrogen and plant spacing on the yield components of non-photoperiod sensitive rice varieties
Gepubliceerd in 1969Thesis -
146
An economic analysis of the efficiency of the nitrogen fertilizer in rice production
Gepubliceerd in 1969Boek -
147
-
148
-
149
-
150


