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          農化知識:施肥首先要觀察天氣情況,天氣干旱時,施肥應結合澆水;高溫多雨天氣宜少施和勤施;其次應根據土壤施肥,粘性土壤、砂質土壤、鹽堿地等應采取不同的肥料,達到最佳肥效效果;三是應看苗施肥,苗教黃應多施肥、偏氮肥,反之應少施或不施。

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