Method for estimation of pre-sowing soil moisture of winter wheat and suitable planting dates
Keywords:
winter wheat, soil moisture, climate data, homoclime, planting dates, fuzzy setsAbstract
The pre-sowing soil moisture is a determining factor at the beginning of the growing season for winter wheat. The publication describes a method for its estimation based on meteorological and soil-physical information. The application of the method is illustrated with data from different locations and soils in the country. Also are investigated planting dates of winter wheat grown on the territory of selected USA states, which have similar homoclimates with Bulgaria. A simple solution approach was applied for the determination of suitable planting dates by solving a general fuzzy system of linear equations with mixed fuzzy crisp explanatory variables and fuzzy unknown variable vectors.
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