根据黄土丘陵区土壤肥力特点及土体结构，选用硝酸铵和过磷酸钙作为试验肥料，进行了不同施肥量试验。
According to soil fertility and soil structure in the loess plateau, the experiment of fertilizer amount was carried out with ammonium nitrate and calcium superphosphate.
结果表明，3例结石的化学成分分别为磷酸钙、磷酸铵镁和混合性结石。
The results showed that the chemical compositions of the 3 cases were calcium phosphate, struvite and mixed urolith respec.
磷酸一铵、磷酸二铵、复合肥、复混肥、过磷酸钙、冲施肥制造、销售。
Production and Market Situation for High Efficient Compound Fertilizer-Ammonium Nitrate & Calcium Nitrate;
应用推荐