Fertilizer-polymer mixtures which inhibit nitrification in soils
US7666241B2 · kind B2 · utility
14Cited by
5References
14Claims
0Family size
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Key dates
| Filing date | Jan 24, 2007 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Apr 18, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P60/21
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Improved, low-pH aqueous polymer mixtures are provided which can be applied directly to soils or incorporated within ammoniacal nitrogen-containing fertilizers to inhibit nitrification in soils, thus enhancing plant uptake of ammonium and yields. The polymers are advantageously used as metal (e.g., Ca) salts or complexes at pH levels of up to about 2. The polymers have anionic functional groups and are highly water dispersible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.