TY - BOOK AU - Sehgal, J.L. AU - Mandal.D.K,Mandal.C & Vadivelu.S TI - AGRO-ECOLOGICAL regions of India SN - 8185460159 U1 - 577 23 PY - 1992/// CY - Nagpur PB - National bureau of soil survey & land use planning KW - Ecology KW - Agricultural ecology N1 - Includes appendix ER -