...玉米产量； 土壤有机碳库；微生物特性????? [gap=1455]keywords：straw returning to field; double ridges and furrows with plastic mulch; maize yeild; soil organic carbon pool; microbial properties ..
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Maize yeild estimation 玉米估产
maize yeild
玉米频频出现
以上为机器翻译结果，长、整句建议使用 人工翻译 。
By using randomized-block design of two factors, the effects of Daerfeng fertilizer and spraying date on maize yeild and other economic characteristics were studied.
采用随机区组设计方法，研究了达尔丰喷施时期和喷施量对玉米产量和其它经济性状的影响。
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