论文部分内容阅读
为了更好地发挥氮磷比化肥肥效,提高科学施肥水平,于1983年8月23日—26日在秦皇岛市郊区召开了氮磷化肥适宜用量和比例学术讨论会。会议总结交流了两年来氮磷肥用量和比例的试验研究结
In order to give full play to the nitrogen and phosphorus fertilizer efficiency and improve the level of scientific fertilization, in August 23, 1983 -26 day in Qinhuangdao city held a suitable amount and proportion of nitrogen and phosphorus fertilizer seminars. The meeting summed up the exchange of two years of nitrogen and phosphorus fertilizer consumption and the proportion of experimental study