推荐回答（4个）
农民种地施肥如何计算配方施肥量的话，要视你家的土地肥沃来定夺，不能一根而论。
如果你家的土地距离家里比较近，土杂肥施用太多的话，那说明你的土地比较肥沃，施肥化肥作为底肥时，应该减少化肥的用量才行，以免导致你所种植的农作物会只有苗，不结粒而减产的。
就拿七星老农过去种植蔬菜与稻谷为例，如果你是菜土多，家中土杂肥料比较少的话，肯定会是土杂肥料先近而后远。
譬如说，你家里种植稻谷时，屋门口的田里肯定平时施用的土杂肥料比远处的田里多。
例如你平时做秧田，种植冬季作物时，肯定会选屋门口田里去种植的，因为它们距离屋里近，施用土杂肥料都比较方便，又便于你种植与管理是吧。
七星老农就拿屋口的粮田与距离你家远的粮田相比较，近的粮田不但你平时施用了土杂肥料，而且屋门口的阴沟里的肥水，也经常灌溉到了田里，所以屋门口的粮田比远方的粮田比较肥沃的。
在同等的面积下，你屋门口的粮田施用化肥时，要比远方的粮田用量比例少一些，而且产量一样，甚至会更高一些。
七星老农就拿屋门口的粮田为例，种植水稻时，一亩地只用50斤碳酸氢铵，50斤磷肥作为底肥施用足够了，稳蔸分药时施用10斤尿素，15斤钾肥就行啦，亩产量在1000斤以上。
而你距离家中远的粮田，由于你平时不放土杂肥进去，全靠一些化肥去生长发育的话，底肥的比例要放的比屋门口的田里多一些，一般一亩田要施用80斤碳酸氢铵，100斤磷肥，15斤尿素，20斤钾肥才行啊。
所以，七星老农个人认为，农民种地施肥要计算肥料的配方，必须要视你土壤的肥力来决定的，不能一概而论，距离家中近的田，土杂肥料放得多的话，氮肥就用少一点，磷钾肥料就多一点，如果你家农田距离家中比较远，平时施肥的土杂肥料比较少的话，那么你施用化肥时，氮磷钾肥必须要用多一点儿才行。
施肥量的估算最常用的方法是营养平衡估算法，它是根据作物计划产量与土壤供肥量差计算施肥量。其公式为：施肥量=（农作物需肥量-土壤供肥量）/（肥料中有效养分含量×肥料利用率）。
不同作物对养分的总需求量不同，现在测土配方施肥技术可以测出土壤中的养分含量，并依据计划产量计算出施肥配方。广大农户可以直接选购测土配方专用肥或者根据配方自行选用优质单质肥进行配施。
它是根据作物计划产量与土壤供肥量差计算施肥量。“平衡”就在于土壤供应养分不足的部分通过施肥来补充，其公式为：施肥量=（农作物需肥量-土壤供肥量）/（肥料中有效养分含量×肥料利用率）
测土施肥包括两点含义，第一测土，测试出土壤中氮、磷、钾以及微量元素的含量。第二施肥，根据测出土壤中的含量以及准备种什么农作物需要的氮磷钾的量做出施肥。
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