Method for optimizing particle size of controlled-release nitrogen fertilizer oxamide particles for single basal fertilization
US11981612B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2022 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Sep 9, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05C11/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a method for optimizing a particle size of controlled-release nitrogen fertilizer oxamide particles for single basal fertilization, which comprises the following steps: measuring a pH value of the soil in a region; measuring an organic matter content OM of the soil, with a unit of g·kg−1; measuring a total nitrogen content TN of the soil, with a unit of g·kg−1; collecting an average temperature T at a 10 cm depth of the soil in a rice growing season in the region, with a unit of ° C.; and for a rice variety with a growth duration of D, with a unit of day, calculating a diameter of controlled-release nitrogen fertilizer oxamide particles for single basal fertilization that matches a nitrogen requirement in the rice growth duration by using a formula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.