于1999 - 2002年对渭北旱原红富士苹果园不同水分条件有机肥施用模式进行了研究。

Organic fertilizer application patterns in Fuji apple orchard on Weibei Plateau in 1999-2002 were studied.

youdao

采集了燕山山区20个苹果园富士、国光和金冠等品种的120份叶样，对叶片中氮、磷和钾含量进行了分析。

The Fuji, Ralls and Golden Delicious of apple varieties, 120 samples were collected from 20 orchards in Yanshan mountain area and the leaf n, p, K contents were analyzed.

youdao