Start / Crops and productivity / Crop yield
Enter the population, the number of pods or ears per plant, the grains per structure, and the thousand-grain mass to estimate the yield before harvest.
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 much yield changes when the number of structures per plant varies from half to one and a half times; the dot marks your estimate.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Estimate using the grains per structure and thousand-grain weight entered, for populations and numbers of pods or ears close to yours. The highlighted row is your population.
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.
Choose the crop and fill in the four components: plant population, pods or ears per plant, grains per structure, and thousand-grain weight. When you choose the crop, the calculator fills in typical values that you should replace with your own field's figures. The result comes out in grains per square meter, kilograms per hectare, and 60 kg bags.
Soybean with 300,000 plants/ha, 40 pods per plant, 2.4 seeds per pod and a thousand-grain weight of 150 g.
Grains per hectare = 300,000 × 40 × 2.4 = 28.8 million. Mass = 28.8 million × 150 ÷ 1,000,000 = 4,320 kg/ha, or 72 bags.
| Component | How to measure |
|---|---|
| Plant population | count the plants in 1 m² at three or four points and multiply by 10,000 |
| Pods or ears per plant | count ten representative plants, at several points |
| Grains per structure | open a sample of pods or ears and count the grains |
| Thousand-grain weight | weigh 1,000 grains from the batch on a precision scale, at standardized moisture |
With the estimate in hand, see the cost per bag in the production cost per hectare and the planting population setting in planter setting.
Count the plants per square metre, the pods or ears of some plants, the grains of each structure, and weigh a thousand grains from the lot. Multiplying these components and dividing by the bag unit gives the result in bags per hectare.
It depends a lot on the cultivar, the population, and the climate. Count ten representative plants at several points in the area, instead of using a single number.
Yes. It drops with drought and heat during grain filling. So it is worth updating the value with sampling from your own crop before estimating production.
The components multiply, so a 10% error in each one becomes a large error in the total. Sample more points and redo the calculation closer to harvest.
Use a 1 m² quadrat, or two meters of row multiplied by the spacing. Count at three or four random points and take the average.
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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