21. _Possoz_:

40 grams copper sulfate; 300 grams potassium-sodium tartrate;

29 grams sodium hydroxid; 159 grams sodium bicarbonate, allow

to stand six months before use. Fill to one liter. One cubic

centimeter equals 0.0577 gram dextrose. One cubic centimeter

equals 0.0548 gram cane sugar.

Principles and practice of agricultural analysis. Volume 3 (of 3), Agricultural products · 第 50 / 164 题