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008 870101n cr |||||r|||| 00| | eng d
022 _a0041-4360
040 _cCR-SiIICA
041 _aeng
100 _968543
_aForsythe, W.
100 _9123193
_aTafur, N.
245 _aThe effect of various methods of land preparation on soil resistance to penetration and yield of corn (Zea mays L.), cassava (Manihot esculenta Crantz) and sweet potato (Ipomoea batatas L.) in association, 1: Effect of cropping systems and land preparation on the soil
440 _9171443
_aTurrialba (IICA)
_x0041-4360
_vv. 35(4) p. 357-370
500 _aGráf.; 13 ref. Sum. (En, Es); tab.
901 _aP33
_b00207
902 _aF08
903 _aE
904 _aIICA
905 _aC
906 _a19870101
908 _aJ
909 _aAS
942 _cART
942 _cIMP
999 _c2425
_d2425