Kansas Winter Wheat Yield Estimation and Modeling (1978)

摘要

The report discusses a research effort directed toward improved methods of forecasting winter wheat yield at the field level. Reliable forecasts of the weight per head component are made in four yields in Ellsworth County, Kansas using a constrained logistic growth model. Yield estimation is done in two ways. Yield is estimated directly from grain weights obtained just before harvest and also by using a logistic growth model. The two yield estimates compare well. Data are obtained at the elevator to provide actual production. All yield estimates are higher than the derived elevator yields. A relationship between flowering date and grain weight is identified.