Better irrigation can dramatically improve crop yield and about 40% of the world's food supply is currently derived from irrigated land.
更好的灌溉可以显著提高作物产量；目前，全球约40%的粮食供应都来自于灌溉地。
But no matter how much we maximize crop yield per acre, the limiting factor for food production is land.
但是不管我们如何最大化粮食亩产量，最大的制约因素还是土地。
Lobell put the climate data from various regions together with the crop yield information from the same areas.
罗贝尔将各个地区的气象数据收集起来并整理了同地区的作物产量数据。
Climatic analysis of the crop yield.
作物产量的气候分析。
Photosynthesis is the basis of crop yield.
光合作用是作物产量形成的基础。
Crop identification is the basic work in crop yield estimation.
作物识别是遥感作物估产的基础。
Ways of improving crop yield per unit area and the countermeasures.
提高作物单产的途径与对策。
An operational method of crop yield disaster losses evaluation is introduced.
介绍了农作物产量灾害损失评估业务化方法。
The evaluation results of soil quality are highly correlated with crop yield.
评价结果与实际作物产量高度相关。
The requirement for K supply increases with the increasing of crop yield and quality.
随着农产品产量和品质的不断提高，作物对钾素的需要量也不断增加。
Soil salinity is one of chief environmental factors that limit the crop yield potential.
土壤盐渍化是降低农作物产量的主要环境因素之一。
Our result could potentially be used to increase crop yield and efficiency of land usage.
我们的研究将为提高作物产量，增加土地利用率提供理论依据。
Optimum planting pattern is the key to increase crop yield potential in intercropping system.
合理的田间配置是间套作种植挖掘作物产量潜力的关键。
A quantitative drought index is necessary for soil water management and crop yield evaluation.
农田水分管理以及产量评估都需要对土壤作物受旱状况定量化和指标化。
They celebrate this holiday in hopes of fair weather and a good crop yield in the coming year.
人们庆祝这个节日，祈求一年风调雨顺好收成。
Nitrogen and water are major factors for maintaining crop yield, getting better economic return.
氮素和水分是维持水稻高产和获得较高经济效益的主要因素。
Coupling remote sensing data with crop growth models to predict crop yield is a hot research topic.
将遥感信息与作物生长模式结合来预测作物产量，是目前的一个热点研究课题。
Heterosis as a common biological phenomenon in nature is an efficient approach to increase crop yield.
杂种优势作为自然界一种普遍的生物学现象，是提高作物产量的一种有效途径。
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。
Leaf early senescence directly reduces its photosynthetic capacity, decreasing crop yield and grain quality.
水稻叶片早衰直接影响作物的光合效率，减少产量，降低品质。
Seed is the internal factor of improved crop yield and is the materialization of advanced technology vector.
良种是作物增产的内因，是先进技术的物化载体。
Can effectively complement crop boron element, increase crop resistance to significantly increase crop yield and quality.
可有效补充作物硼元素，增加作物抗逆性能，显著提高作物产量与品质。
Experimental results also indicated that sprinkler uniformity had little effect on crop yield for the studied range of CU.
试验结果还表明，在所研究的喷灌均匀系数范围内，均匀系数对产量的影响不明显。
The term water production function does not reflect statistical characteristics of the relationship between crop yield and water.
作物水分生产函数的名称不能确切反映作物产量与水分关系的数学特点。
The characteristics of soil and water loss and crop yield by cross ridge in purple soil of different sloping farmland were studied.
通过在紫色土坡耕地上进行横坡垄作，观测了不同坡度坡耕地的水土流失及作物产量状况。
Effects of different fertilizing modes on soil environment quality and crop yield of kailyard were studied through field experiment.
通过田间试验，研究了不同施肥方式对菜园土壤环境质量及作物产量的影响。
In order to increase crop yield and retard decrease of soil K, wheat straw to soil was an effective measure to complement potassium.
但从提高作物产量和缓解土壤钾素下降来看，小麦秸秆还田是一个有效的补钾措施。
This paper attempts to draw a general relationship between crop yield loss and chewing injury of reproductive organs by insect pests.
本文试从分散的材料中概括出主要大田作物繁殖器官被害与产量损失之间的一般关系。
This paper attempts to draw a general relationship between crop yield loss and chewing injury of reproductive organs by insect pests.
本文试从分散的材料中概括出主要大田作物繁殖器官被害与产量损失之间的一般关系。
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