第二，粮食作物分布状况可以改善，每英亩土地的粮食产量可以提高。
Second, the distribution of food and the yield of food per acre can be improved.
这种供水方法而不考虑片内作物分布和作物品种差异对需水的要求及土壤的实际含水量。
That is the farmers have no choice but to irrigating by turns. And they can't take into account distributing of crops and water requirement and water content of soil.
认为热量是限制作物分布和耕作制度的决定因素，在同样热量条件下，降水又成为决定因素。
It is thought that heat is the determinant which affects the distribution of crops and farming systems. Under the same condition of heat, precipitation will become the decisive fac...
例如，这一分析没有追踪现已被耕种地区的产量随时间的变化，反而使用的是2000年前后的作物分布图。
For example, the analysis does not track changes over time in the areas being farmed, using instead a crop map from around 2000.
植物遗传资源的收集、存储和处理以及它们在全球的分布，是国际作物和树木改良计划的重要成分。
Collection, storage and handling of plant genetic resources and their global distribution are essential components of international crop and tree improvement programmes.
在今天的非洲，高粱依然分布广泛的粮食作物，现在看来，它填饱人类肚子的历史要回溯许多年了。
没有人工控制光照的分布，将会导致农作物生长不均匀，靠近窗户的作物由于受到的日照更多而生长的更快。
Without artificial lighting the result will be an uneven crop, as plants closest to the windows are exposed to more sunlight and grow more quickly.
但大量可供种植的土地分布不均，而且大多只适合种植少数农作物品种。
But the additional land available for cultivation is unevenly distributed, and much of it is suitable for growing only a few crops.
农作物对磷具有依赖性，由于磷一般均分布在土壤的表层，因而使农作物的根扎得浅。
With crops that rely on phosphorus, he's breeding shallow roots, since phosphorus is typically found in topsoil.
虫生真菌是农作物害虫的一类重要致病菌，广泛分布于自然界。
Entomogenous fungus is an important pathogenic germs of crop pests and is ubiquitous in natural environment.
文章分析了膜上灌的节水原理、节水效果及对作物根系分布的影响，并提出了其技术规范。
The water -saving principle, effect and impact to crop roots distribution are analysed and the technology standard is also presented in this paper.
研究了黄土塬区塬面不同套种作物的幼树苹果园土壤微生物的分布和酶活性。
This paper presents the analysis results of the soil microbe distribution and enzymatic activity in the young apple garden with different intercropping system in the loess region.
土壤缺磷是世界范围内普遍存在的问题，它严重限制了作物的产量及分布。
Phosphorus deficiency, which seriously limits yields and distribution of crops, is a problem extensively existing in soils around the globe.
对北京的环境地理、采样、分析测定、土壤和作物测定的分布类型和区域间的差异性进行了探讨。
The geographic environment, sampling, analytical method, distribution state of all data for different soils and crops, and difference between districts were discussed.
本文分析了温度与粮食产量的关系，指出了作物遭到低温危害的原因、类型、指标及其地域分布规律。
In this paper the relationship between the temperature and crop yield was analysed and the causes, types, indexes and distribution of low temperature damage on crops were noted.
低温冷害是农业生产中一种重要的自然灾害，严重影响作物产量和地域性分布。
Chilling injury is an important natural disaster in agricultural production, seriously affected crop production and geographical distribution.
采用大口径土钻对间作种植模式下冬小麦与春玉米根系进行取样，分析了两种作物根系的空间分布及动态变化规律。
In this paper, root samples of winter wheat and spring maize under intercropping were taken with large-bore soil auger, and the dynamics of their spatiotemporal distribution were studied.
与世界情况类似，我国油料作物大规模生产的地区分布也相对集中。
Like the world, China's geographical distribution of oil-bearing crops production is also relatively concentrated.
地中海果蝇：有黑和白斑的双翅蝇（蜡实蝇蜡实蝇属） ，分布于世界上许多气候温暖的地区，其幼虫会破坏柠檬和其他果实作物。
A black and white two-winged fly (Ceratitis capitata) found in many warm regions of the world, the larvae of which destroy citrus and other fruit crops.
根据黑龙江省各主要作物成熟期的时空分布情况，讨论了初霜冻对主要作物安全成熟的影响。
Based on spatiotemporal distribution of most crops' mature period in Heilongjiang Province, influences of early frost on most crops' safety maturity are discussed.
模型对冬小麦—夏玉米轮作体系作物叶面积指数、作物系数、根系生长与分布进行了模拟。
In the model, the leaf area index (LAI), crop coefficients, and root penetration and distribution were simulated for the winter wheat and summer corn double cropping system.
并对我国不同气象(侯)条件下标准温室的温室效应分布规律进行比较研究，为选择适宜温室种植的作物品种和相应的种植方案提供理论基础。
Furthermore, the laws of greenhouse effect existing various climate conditions were compared, which can lay the foundations for selecting the proper crops and planting plans.
同时，在相同环境条件下对有作物覆盖的土壤床和无作物覆盖的土壤床中的水热分布也进行了模拟比较。
The simulation is also made to describe the heat and mass distribution under the same environmental conditions between vegetation soil-bed and bare soil-bed.
植物病毒协生作用分布广，是造成农作物减产的重要原因之一。
The widespread synergism of plant virus is one of main factors leading to crop loss.
虽然在少耕制下，土壤钾有明显的分层分布但在土表附近，作物根系发达保证作物对钾有足够的吸收。
Even though potassium is stratified under reduced tillage, it is apparent that roots proliferate sufficiently near the soil surface to assume adequate potassium uptake by crops.
阐述农作物所需养分在作物中的分布和在土壤中的去向。
The nutrients distribution in crops and the destination of input nutrients in soils are described.
真菌是农作物害虫的一类重要致病菌，广泛分布于自然界。
Entomogenous fungus is an important pathogenic germs of crop pests and is ubiquitous in natural environment.
真菌是农作物害虫的一类重要致病菌，广泛分布于自然界。
Entomogenous fungus is an important pathogenic germs of crop pests and is ubiquitous in natural environment.
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