To take an extreme example, farmlands dominated by a single crop are so unstable that one year of bad weather or the invasion of a single pest can destroy the entire crop.
举个极端的例子，以单一作物为主的农田是如此不稳定，一年的坏天气或单一害虫的入侵可以摧毁整个作物。
Thus there should be studies for finding an optimal fertilizer schedule based on a cropping system including intercropping systems rather than for a single crop only.
因此，应该研究包括间作在内的种植制度而不仅为某种作物寻找合适的施肥方案。
Submergence and drought are major constraints to rice (Oryza sativa) production in rain-fed farmlands, both of which can occur sequentially during a single crop cycle.
对于水灌溉农田而言，涝害和干旱是水稻产量的主要限制因素，并且涝害和干旱胁迫可以在同一季水稻生产过程中相继发生。
The selection of single irrigation technique is a complex systematic engineering including many factors such as climate, terrain, soil, crop and planting mode.
灌区单项灌溉技术的筛选是一个涉及气候、地形、土壤、作物和种植方式等众多因素的复杂系统工程。
But experts asid no single crop will revolutionize farming in Africa. Because farmers there grow a mixture of different crops.
但是专家表示没有一种单一的农作物可以给非洲农业带来根本性的变化，因为那里的农民混合种植不同的农作物。
All these improvements come from one single change - a larger 1.5x crop sensor.
所有这些改进都来自一个单一的变化-一个更大的1.5倍作物传感器。
But experts say no single crop will revolutionize farming in Africa because farmer there grow a mixture of different crops.
但是专家表示没有一种单一的农作物可以给非洲农业带来根本性的变化，因为那里的农民混合种植不同的农作物。
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 invention belongs to a crop threshing machine, and in particular relates to a soybean single plant threshing machine for agricultural research.
本发明属于农作物脱粒机械，特别是一种农业科研用大豆单株脱粒机。
Smoking in the field is strictly forbidden in the harvest season; a single spark can start a fire that will wipe out all the crop.
收获季节严禁在田地里吸烟，一点儿火星都可能引起一场大火，烧毁所有的庄稼。
Smoking in the field is strictly forbidden in the harvest season; a single spark can start a fire that will wipe out all the crop.
收获季节严禁在田地里吸烟，一点儿火星都可能引起一场大火，烧毁所有的庄稼。
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