Over high-yield 超高产
Over time farmers came to rely heavily on broadly adapted, high-yield crops to the exclusion of varieties adapted to local conditions.
久而久之,农民严重依赖普遍适应性、高产的作物,而将那些适应本地环境的品种排除在外。
The result showed that the technology made rice yield increase over 13%, production cost decrease over 300 Yuan per ha. The high yield and benefit from rice production was finally gained.
实践证明,配套技术的应用,使水稻平均每公顷增产13%以上,生产成本减少300元以上,达到了高产高效。
The V-P-O catalyst for oxidation of n-butane to maleic anhydride was prepared. High yield of maleic anhydride was obtained over the catalyst under suitable reaction conditions.
研制的V - P - O型固定床丁烷氧化制顺酐催化剂,在一定的反应条件下,可得到较高的顺酐收率。
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