Increases in agricultural production have resulted from and will continue to result from the introduction of new more productive varieties of crops.

农产品产量的增加是因为引进了新的、产量更高的农作物品种，而这种趋势将会持续。

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Increases in agricultural production have resulted from and will continue to result from the introduction of new, more productive varieties of crops.

农产品产量的增加是因为引进了新的、产量更高的农作物品种，而这种趋势将会持续。

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This paper was a partial content of '948' project of agricultural Department about introduction and breeding the new alfalfa varieties with high yield and fine quality and high resistance.

本文是农业部‘948’项目“高产优质抗逆苜蓿新品种的引进与繁育”课题的一部分内容。

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