DIRECT DRILLING AND PLOWING - THEIR EFFECTS ON THE DISTRIBUTION OF EXTRACTABLE PHOSPHORUS AND POTASSIUM, AND OF ROOTS, IN THE UPPER HORIZONS OF 2 CLAY SOILS UNDER WINTER-WHEAT AND SPRING BARLEY

被引:21
作者
DREW, MC
SAKER, LR
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D O I
10.1017/S0021859600029038
中图分类号
S [农业科学];
学科分类号
09 ;
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页码:411 / 423
页数:13
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