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These zinc fertilizers differ in total zinc, water-soluble zinc concentration, price and composition (Table 1). Fertilizers with zinc sulfate, especially in its heptahy-drate form (e.g., ZnSO 4.7H2O), are the most common-ly applied zinc fertilizers due to the higher solubility and relative low cost of zinc sulfate.
- Zinc Fact Sheet: Zinc Fertilizer Overview - Crops
The Food and Agriculture Organization (FAO) has determined...
- Zinc Fact Sheet: Zinc Fertilizer Overview - Crops
The Food and Agriculture Organization (FAO) has determined that zinc is the most commonly deficient micronutrient in agricultural soils; almost 50% of agricultural soils are Zn deficient.
Zinc deficiency is routinely corrected by soil and/or foliar applications of zinc fertilizers. Zinc sulphate (ZnSO 4 ) is the most widely applied inorganic source of zinc to soils or leaves due to its high solubility, low cost, and availability in the market.
In order to calculate a fertilizer application rate, you will need: (1) the N-P2O5-K2O content of the material from the package label, (2) your target rate (normally from a soil test), (3) the total area you will be applying to, and (4) the density of the material if a liquid fertilizer is to be used.
A sufficient amount of zinc is about 20-70 ppm in the plant tissue. A soil test of 0.8-1.0 ppm would imply that zinc is sufficient in the field. If a deficiency is found, recommendations are generally to apply 1 to 2 pounds actual zinc per acre as a banded application, or 5 to 10 pounds as a broadcast application.
As a result, care must be used in selecting the most economical, effective Zn fertilizer for specific conditions at hand. This paper discusses Zn sources, their methods of production and application, and their behavior in soil, along with chemical evaluation and regulations affecting Zn fertilizers. 3. Zinc sources.
There are many zinc (Zn) fertilizers available, but the most common inorganic compounds are zinc sulfate (ZnSO 4), which is the most used Zn fertilizer because of its high solubility, and zinc oxide (ZnO).
