1. Nitrogen economy in tropical soils :proceedings of the International Symposium on Nitrogen Economy in Tropical Soils, held in Trinidad, W.I., January 9-14, 1994

Library: Central Library of Agricultural (Tehran)

Subject: $ASoils$BTropics -- Nitrogen content -- Congresses,$ACrops and nitrogen$BTropics -- Congresses,$ANitrogen fertilizers$BTropics -- Congresses

Classification :
S
592
.
6
.
N5I58
1994