Effect of copper and zinc on wheat on newly cleared grey sandy over red brown mottled clay

To determine the rates of copper and zinc required for maximum grain yield of wheat grown on grey sandy surface over red brown mottled clay .

本研究旨在确定种植于覆盖红棕斑驳黏土层的灰色砂质表层土壤中的小麦，达到最高籽粒产量所需的铜及锌施用量。