论文部分内容阅读
最近几年来,西北各地试验单位磷肥试验结果颇不一致。为了进一步研究过磷酸钙的合理施用,以供农业生产上的参考,特设计本试验。一、设计与处理
In recent years, experimental units around the northwest of the test results of phosphate fertilizer is quite inconsistent. In order to further study the reasonable application of superphosphate for agricultural production reference, specially designed this experiment. First, the design and processing