RESEARCH ON PRODUCTIVITY AND RESOURCES UTILIZATION RATE OF VARIOUS MULTIPLE CROPPING PATTERNS IN HUANG HUAI PLAIN
PANG Huancheng, CHEN Fu
JOURNAL OF NATURAL RESOURCES ›› 1998, Vol. 13 ›› Issue (3) : 198-205.
RESEARCH ON PRODUCTIVITY AND RESOURCES UTILIZATION RATE OF VARIOUS MULTIPLE CROPPING PATTERNS IN HUANG HUAI PLAIN
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