FACTOR PRODUCTIVITY TRENDS IN A RICE–WHEAT CROPPING SYSTEM UNDER LONG-TERM USE OF CHEMICAL FERTILIZERS
YADAV, R. L.Volume:
34
Language:
english
Journal:
Experimental Agriculture
DOI:
10.1017/s0014479798001070
Date:
January, 1998
File:
PDF, 1.33 MB
english, 1998