Soil fertility maps of India
Jain, H.K.
Soil fertility maps of India - New Delhi 1980 - 1-17 p. - Soil, Fertility Indian Agricultural Research Institute. Research Bulletin No. 22 .
Soil fertility maps of India - New Delhi 1980 - 1-17 p. - Soil, Fertility Indian Agricultural Research Institute. Research Bulletin No. 22 .