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。
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。
The structure of Database was analyzed and the general functions that the system must possess were designed according to the management norm of QiLu Petrol Chemical Crop.
根据齐鲁石化公司设备处提供的设备管理规范，设计了设备防腐保温管理系统和管道管理系统的数据库总体结构以及完整的信息管理系统功能。
The functions of SAPs were brief reviewed, such as the ability of improving soil structure and water retention, inhibiting water evaporation, promoting crop growth and output.
高吸水树脂可以通过抑制水分蒸发，增加土壤含水量以及改良土壤结构等方面，起到保水和促进作物生长发育以及提高产量的作用。
Its position is in the exact center of the Large Tetrahedron Structure, and it is the core of the crop circle ship.
它的位置是在大型四面体结构的正中心，和它是麦田圈船的核心。
Through the field investigation, relationships between shelterbelt structure and crop yield were discussed.
农防林的结构特征与作物产量关系密切。
The straw still can increase the soil organic matter, improve the soil structure, increasing soil fertility to return the field, can make the crop grow more stalwart, the output is higher.
秸秆还田还能增加土壤有机质、改良土壤结构、增加了土壤肥力，能使作物生长更健壮，产量更高。
The experiment results of economic crop desiccator were analyzed after introducing the principle and structure of the desiccator.
阐述了该机的结构特点和工作原理，并介绍了干燥试验结果。
The cluster analysis showed that crop type impacts the community structure of soil archaea.
聚类分析结果显示，作物类型会影响土壤古菌群落结构。
The invention applies to the tea crop production, which can improve the soil structure and provide adequate moisture, oxygen and nutrition to improve the yield and quality in tea crop cultivation.
本发明应用于茶树作物的生产，能够改善泥土的结构及提供足够的水分、氧气及营养，提高种植茶树作物的产量及质量。
The invention applies to the tobacco crop growth, which can improve the soil structure and provide adequate moisture, oxygen and nutrition to improve the yield and quality in tobacco crop cultivation.
本发明应用于烟草作物生长，能够改善泥土的结构及提供足够的水分、氧气 及营养，提高种植烟草作物的产量及质量。
With the relative water consumption of each growing stage as input and relative crop yield output, a BP artificial neural network structure containing a single hidden layer is established.
将各生育阶段的耗水量作为输入，将作物单产作为输出，构建了具有1个隐含单元层的BP神经网络结构。
The method has the following advantages that: 1, the crop stalks are degraded to provide a great number of organic matters, improve soil structure and provide nutrient needed by plants;
本发明具有下列优点和积极效果：①作物秸秆分解能提供大量的有机质，改良土壤结构，并提供植物生长需要的养分；
The community structure of arthropods both in heterogenous and in monotogenous habitat in two-crop paddy field area was studied with the suction sampler.
用吸虫器采样法，对双季稻区中处于多样化生境及单一生境中的两类稻田中的节肢动物群落结构特征进行了比较研究。
The community structure of arthropods both in heterogenous and in monotogenous habitat in two-crop paddy field area was studied with the suction sampler.
用吸虫器采样法，对双季稻区中处于多样化生境及单一生境中的两类稻田中的节肢动物群落结构特征进行了比较研究。
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