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nong ye chang yong de ji liang ji suan fa
Author(s): 
Pages: 47
Year: Issue:  2
Journal: Reclaiming and Rice Cultivation

Keyword:  有效成分浓溶液农业百分比浓度酒精外包装袋农田化肥计算法尿素用量农作物;
Abstract: 1化肥用且的计算质量合格的化肥外包装袋或施用说明书上均标有其中有效成分的含量(常用百分比表示)。农田化肥的施用量,可根据要施用的某种化肥中有效成分的含量来计算。所需施用化肥重量一农作物所需有效成分量:化肥中有效成分的含量。例如:小麦正常发育一般每亩需汽素skg。氮月巴中尿素含氟量为46%.碳酸氢按含氮量为17%。施用尿素,每亩尿素用量一5H46%一llkg;施用碳按,每亩联接用量一5十17%一29.skgo2溶液稀目的计算在生产中,农药一般都要加水稀释后才能使用,浓溶液配成稀溶液,可按以下。诀计算:“浓除以稀.商减一”。例如:要将浓度为95%的酒精配成浓度为65%的酒精,Ikgos%的酒精中应
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