000 00408 a2200121 4500
080 _a631.58:631.459:631.61(213.5)
_bE 97 F
245 1 _aFarming systems principles for improved food production and the control of soil degradation in the arid, semi-arid and humid tropics
_bPriceedings
260 _aPatancheru
_bICRISAT
_c1986
650 _aFarming Systems
100 _a
_d
300 _a36 p.
901 _a179506
999 _c81766
_d81766