Start / Crops and productivity / Crop yield
See how many days remain for the crop to reach the next stage, based on degree-day accumulation above the base temperature.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
How many days remain at different average temperatures; the highlighted bar is your pace.
Degree-days accumulated over the next 120 days at the day's pace; the dashed line is the phase target.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Degree-days per day and days to the phase at average temperatures of 18 °C to 30 °C, with the base and accumulated values entered.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the day's maximum and minimum temperature (or period averages), the crop's base temperature, the degree-days already accumulated, and the total required by the cultivar's phase. The calculator shows the degree-days of the day and the days to the phase.
Maximum of 30 °C, minimum of 20 °C, base of 10 °C, 300 °C·day accumulated, and target of 1,100 °C·day.
Degree-days of the day = (30 + 20) ÷ 2 − 10 = 15 °C·day. 800 are missing. Days = 800 ÷ 15 = 53 days.
It is the temperature below which the crop barely grows. For soybean and corn, the common reference is 10 °C, but confirm with your cultivar.
Because above this temperature growth no longer increases, and the calculation should not add that excess. It is a convention of the method.
From the cultivar's data sheet, obtained in field trials. It varies with the variety and the planting date.
Yes, as an estimate. Use it together with field monitoring, because rain, stress and disease can delay or speed up the stage.
Important notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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