Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1993-12-13
1994-11-22
Lander, Ferris
Chemistry: fertilizers
Processes and products
Organic material-containing
71 6411, 71903, 71DIG2, 47 9, C05F 500
Patent
active
053665333
ABSTRACT:
Inclusion of a certain finely powdered by-product of the citrus fruit processing industry, notably a waste product consisting of processed peel, stems, seeds, and pulp, with relatively inexpensive, finely-powdered soluble iron sulfate [FeSO.sub.4 or Fe.sub.2 (SO.sub.4).sub.3 ] significantly improves the efficiency of iron source fertilizer materials for iron-sensitive plants growing on iron-deficient soils and can maintain supply of available iron to growing plants for substantially extended periods of time. These compositions may be band applied in powdered or granular form in or near the seed row at or prior to planting or spot placed in the root zone of growing plants in soil. The dry band absorbs soil moisture to provide a unique environment which restricts contact of soluble iron fertilizers with the soil and provides for complexation of contained iron with naturally occurring organic acids in the by-product, thereby minimizing the extent of chemical reactions with the soil that reduce the availability of the applied iron to plant roots. Root penetration and proliferation into and around the band also is greater than in the soil matrix, resulting in greater uptake efficiency of applied iron. The ease of preparation and low cost of the product, coupled with significantly enhanced crop response, offer considerable advantage over existing iron source fertilizer materials.
Lander Ferris
Petrusek Robert A.
Tennessee Valley Authority
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