The distribution as well as the content of the particles in N-P electroless codeposits is determined by means of conventional stereome-tric metallograph.

介绍用普通的体视金相法,可以很容易地测定化学复合镀层中固体微粒的分布形态及其含量。

The nutrient of C, N, P, K in rice straw buried by rotocultivator in deep soil layer released at a high rate and less remain than on surface soil.

运用机械将稻秸秆深施于水田土层内，秸秆中的碳、氮、磷、钾养分释放比秸秆面施速率高，残留量少。