00794nam a2200253Ia 4500001001100000005001700011008004100028020002200069020001500091020002500106020001800131050002100149090001600170245005200186260003400238300002800272504004200300505009200342650003000434653001700464653001500481830002900496999001500525000000966920251012174509.0  720717m19729999enkab    b    001 0 eng  a0249440431 (v. 1)  a0249440865  a9780249440430 (v. 1)  a978024944086714aSB110b.A77 19720 a631/.091/5410aCrop production in dry regionsc[by] I. Arnon.   aLondon,bLeonard Hillc1972-   avbillus., mapsc24 cm.  aIncludes bibliographical references. 0 av. 1. background and principles. -- v. 2. systematic treatment of the principal crops.  0aArid regions agriculture.  aArid Regions  aCrop Zones 0aPlant science monograph.  c4755d4755