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Crop growth and development requires an adequate supply of available nutrients at the proper time in the plant's life cycle.
中文意思:
在植物整个生长发育过程中,需要适时供应有效养分。


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Crook——(1)the inward turn of the forelegs on short-legged breeds as in the Basset Hound. 前腿向内弯曲,通常发生在一些短腿的犬种如巴塞特猎犬。
Crop circles are static images of holographic movement that earth is ascending into at this time of global evolution. 麦田怪圈是在此全球进化之时,地球提升入全息运动的静态图案。
Crop circles in my field! 我土地上的农作物图案!
Crop circlesMessages from afar? 榖田里的圆形图案来自远方的讯息?
Crop farming is the material production, which premises the utilization of ecological energy of nature, thus any crop resources can only obtain energy and synthesize materials on condition that they return to ecological system, and the management of crop 摘要作物的生产是以利用自然生态能量为前提的物质生产,任何作物种质资源都要回归自然生态系统才能进行能量截获和物质合成,因此,作物种质的“运筹”需要接受种质生态伦理的约束。
Crop growth and development requires an adequate supply of available nutrients at the proper time in the plant's life cycle. 在植物整个生长发育过程中,需要适时供应有效养分。
Crop rotation plus fertilizer application produces the highest crop yields and maintains the highest soil N and organic matter levels. 作物轮作加施肥产生最高作物产量,并保持最高土壤氮和有机质水平。
Crop rotations without addition of fertilizers help maintain soil organic carbon and N levels, but do not maintain high productivity levels. 不施肥的作物轮作有助于维持土壤有机碳和氮水平,但不能维持高生产力水平。
Crop stalks (CSs) are important biomass resources. 摘要农作物秸秆是重要的生物质资源。
Crop weather may restrain gains but the sharp cut in soybean acreage may keep giving the soy complex a lift for several trading sessions, the traders said. 交易商称:天气或许会对上扬有所抑制,但大豆种植面积的锐减将会持续推动最近几轮豆类产品走高。
Crop yields in Pakistan are low and the rates of growth have been dismally low: for the 10-year period ending 1990, the annual growth rate for wheat was 1.5%, rice -0.3%, maize 0.9%, sugarcane 0.8% and cotton 4.4%. 巴基斯坦作物产量低下(表1),增长速度也很低,截止1990年的十年中,小麦产量年增长1.5%、水稻0.3%、玉米0.9%、甘蔗0.8%、棉花4.4%。
 
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