previous crop

Compared with the previous crop type of soybean, rice planting in the previous season accelerated soil nitrification-denitrification rate in the following wheat season.

与前茬种植大豆相比，前茬作物水稻促进了后季麦田土壤硝化-反硝化作用。

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A pot experiment was carried out to investigate the effect of rice straw application time in the previous crop season on CH4 emissions from rice field.

通过盆栽试验研究了前茬季节稻草还田时间对稻田CH4排放的影响。

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Seasonal variation of soil Eh and CH4 fluxes were also affected by rice straw application time in the previous crop season.

稻草还田时间还明显影响CH4排放和土壤Eh的季节变化。

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The fresh applied fertilizers to groundnut did not affect the groundnut yield, essentially because higher levels had already been applied to previous maize crop.

新施于花生的肥料对花生产量不产生影响，根本原因在于前茬作物玉米已施过较高水平的肥料。

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Effects of Previous Crop on Soil Nutrient Availability, Plant Nutritional Status, Yield and Quality of Flue-cured Tobacco

不同前作对烟田土壤养分供应、烟株营养及烟叶产质量的影响

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High temperature, heavy rainfall, peanut as previous crop, cow dung as base fertilizer, small leaf tall stem variety, straw covered or non covered caused a higher incidence.

的影响大，在高温、降雨多、前季作物为花生、用牛粪作基肥、尖顶窄叶高秆品种、土表覆盖稻草或不覆盖等条件下发生更严重，而白术生育期对此没有影响。

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It was shown that soybean was the best previous crop of sugar beet, which have increased 10. 8%~ 14. 4%, for root yield, net benefit increased 26.5%~ 37.1% than other crops;

结果表明，大豆是甜菜的最好前茬，比其它茬口增产块根10.8%～14.4%，纯效益可增收26.5%～37.1%；

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This decrease is related to the supply enlargement-some mills are still with the product from the previous crop.

下降与供应量增大有关，一些工厂还是用去年的谷物。

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Analysis on Yield and Benefit of Sugarbeet of different Previous Crop and Follow Crop

不同前茬甜菜与其后作产量及效益分析

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Applying rice straw just before soil is flooded for rice transplanting ( DFL) significantly enhanced CH4 flux by 3.04 times in 1996 and 7.12 times in 1997 compared with rice straw application just before the previous crop season ( DFE).

与前茬季节前施用稻草（稻草早）相比，水稻移栽前施用稻草（稻草晚）的处理CH4排放量增加了3.04（1996年）和7.12（1997年）倍。

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Whether or not allow the commodities of the previous crop years to be a substitute should be determined on the basis of the principles of spot market and the futures market.

跨年度交割品是否可以交剖，应在现货市场基础上，结合期货市场运行规律来确定。

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Effect of Rice Straw Application Time in Previous Crop Season on CH4 Emission from Rice Paddy Field

前茬季节稻草还田时间对稻田CH4排放的影响

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Conventional tillage controls weed growth by plowing and cultivating, but no-till farming selectively uses herbicides to kill weeds and the remains of the previous crop.

传统的耕作方法将通过耕地来减少杂草的生长，但免耕农业选择使用除草剂来消灭杂草，以保护作物。

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The long-lasting floods will also affect the ecology of the region rendering much previous crop research useless.

持续很长时间的洪水还影响了该地区的生态，让此前许多农作物研究变得无用。

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