国产磷铵与美国二铵的肥效比较试验吕天宝（鲁北化工总厂２５１９０７）鲁北化工总厂与邹平生资公司合作，对鲁北磷铵与美国二铵进行了肥效比较。１试验方法以一个农户一块耕地作为一个试验点（一般１～３亩），随机分为两部分，一部分施鲁北磷铵（１２．１－４２．４－０... Domestic ammonium phosphate fertilizer and the United States more than diammonium test Lv Tianbao (Lubei Chemical Plant 251907) Lubei Chemical Plant and Zouping Health funded companies, Lubei ammonium phosphate and the United States compared the diammonium fertilizer. A test method A plot of a farmland as a test point (usually 1 to 3 acres), were randomly divided into two parts, part of the Lu North Ammonium Phosphate (12.1-42.4-0 ...