论文部分内容阅读
日本奥多摩工业株式会社新近推出一种新型土壤改良剂。它属天然沸石,含二氧化硅68.6％,氧化铝12.6％,氧化钙1.3％,氧化镁
Japan’s Okutama Industry Co., Ltd. recently introduced a new type of soil conditioner. It is a natural zeolite containing 68.6% of silica, 12.6% of alumina, 1.3% of calcium oxide,