关键词 : 种植业结构 ; 养分平衡 ; 土壤养分特征 [gap=1840]Key words : crop structure ; nutrient balance ; soil nutrient characters
基于8个网页-相关网页
optimum crop structure 最佳作物结构
aptimum crop structure 最佳作物结构
crop structure adjustment 作物布局调整
crop colony structure 作物群体结构
crop ' s structure 作物结构
crop s structure 作物结构
crop plant structure 种植结构
crop growth structure 作物种植结构
crop planting structure 农作物种植结构
To improve methods on crop structure dynamic model, the paper put towards controllable structure model on the base of growth function.
为了完善作物形态结构动态模型建立的方法，在基于生长方程理论建模的基础上，提出了可控式模型的建立方法。
When the irrigation water price is raised, if farmers choose to adjust the crop structure or choose water saving style, the more irrigation water price farmers willing to pay.
在灌溉水价提高时如果农户选择调整作物结构或选择节水，农户意愿灌溉水价就越高。
Collecting fertilization data by spot check, combining with the nutrient qualilty of the furrow soil, we analyzed the fertilization and nutrient structure on the food crop farmland of Fuping County.
采用抽样调查收集的农田施肥数据，结合耕层土壤养分状况，分析了阜平县主要粮食作物的农田施肥状况和养分结构。
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