An economical formulation of ammonia, phosphoric acid and organic acids (including Humin fragments extracted from leonardite) that are chemically reacted to form a compound that is readily absorbed by the plant. Black Label Zn contains the highest percentage of organic acid (7.4%) of any formulation in combination with nitrogen and phosphate and the phosphate is more readily available to the plant than conventional phosphate sources. A very stable formulation with a pH of 6.0, virtually neutral, unlike other humic acid-containing products. Black Label Zn provides the highest content of organic acid in combination with nitrogen and phosphate. Black Label Zn delivers excellent crop safety with increased phosphate availability.