| 摘要 |
<p>Micronutrient fertilizer consisting of iron, manganese, copper, boron, and zinc in which the manganeseto-iron ratio is 8 to 20%, the copper-to-iron ratio is 5 to 10%, the boron-to-iron ratio is .4 to 1.0%, and the zinc-to-iron ratio is 6 to 12%.</p> |
