Abstract: A method for forecasting crop yield and controlling irrigation at a field site based on plant-available water within a growing season. The method involves establishing a desired crop yield, using historical precipitation data to calculate historical seasonal precipitation values, and determining initial moisture factors, historical yields, and permanent wilting points for the field site. Periodic moisture readings are captured at the rooting depth. These values, along with current and forecasted precipitation data, are used to calculate the total available moisture and crop water use efficiency factors. The yield potential (YP) is then calculated, and if it is deviant from the established desired crop yield, control signals are sent to irrigation controllers to adjust water application at the field site. This dynamic irrigation control optimizes water usage to align the calculated yield potential with the desired crop yield, ensuring efficient resource use and improved crop production outcomes.

Abstract: A method of forecasting crop yield for a selected field crop planted at a field site based on the plant-available water within a growing season. A crop water use efficiency factor is established based on historical seasonal available water, which can be applied to current season precipitation and available water estimates. The method of estimating yield potential allows for accurate yield potential forecasting using only precipitation values and current plant-available moisture. Optimal embodiments of the method are practiced using a forecasting software component on a computer. Results of the forecasting method can be displayed using different computer software interfaces.