Slow release soil amendment and micronutrient source

Details Slow release soil amendment and micronutrient source Slow release soil amendment and micronutrient source

1980-11-28

1982-06-15

Therkorn, Ernest G.

Chemistry: fertilizers

Processes and products

Inorganic material

71 50, 71 53, 71 63, 71 646, 71 6411, 71 6413, C05D 1100

Patent

active

043349064

ABSTRACT:
Particulate, easy to handle, inexpensive combination soil amendments and micronutrient sources are disclosed along with methods for their manufacture and use. These compositions comprise highly porous sulfur particles having substantial internal surface area with the micronutrient source dispersed either throughout the sulfur matrix or over the interior surfaces. Major plant nutrients including nitrogen, phosphorus and potassium can also be added but are not essential. These methods allow the use of inexpensive, abundant starting materials, afford slow release sulfur and micronutrient solubility and mobility, reduced micronutrient loss by elution, and minimum ground water pollution and plant toxicity problems associated with heavy metal contamination.

REFERENCES:
patent: 2983594 (1961-05-01), Jost
patent: 2988439 (1961-06-01), Gloss
patent: 3560192 (1971-02-01), DiCicco
patent: 3666523 (1972-05-01), Nau
patent: 3769378 (1973-10-01), Young et al.
patent: 3951639 (1976-04-01), Windgassen
Fertilizer Technology and Use, Olson, 1971, Second Edition, 344, 345, Soil Science of America, Madison, Wisconsin.
Sharpee, Ludwick, and Attoe, "Availability of Zinc, Cooper, and Iron in Fusions with Sulfur," Agronomy Journal, vol. 61, Sep.-Oct. 1969, pp. 746-749.

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