This paper studied the effects of no fertilization on soil nutrients and crop yield in meadow cinnamon soil in Tangyin County.
以褐土类潮褐土亚类潮垆土土属黑底潮砂泥土土种为研究对象，探讨长期定点不施肥对土壤养分含量及作物产量的影响。
The biological characteristics of Tangyin strain of Eimeria brunetti isolated in Tangyin County, Henan province, China and its precocious line were studied.
作者对来自我国河南省汤阴县的布氏艾美尔球虫及其早熟株的生物学特性做了较为详细的研究。
The biological characteristics of Tangyin strain of Eimeria brunetti isolated in Tangyin County, Henan province, China and its precocious line were studied.
作者对来自我国河南省汤阴县的布氏艾美尔球虫及其早熟株的生物学特性做了较为详细的研究。
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