Start / Crops and productivity / Crop yield
From the number of seeds that germinated in each count to the index that compares speed and vigor.
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.
Seeds germinated on each count day.
Percentage of seeds germinated by each count.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Each count with the cumulative total and how much it contributed to the speed index. Earlier counts weigh more in the IVG.
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 number of seeds sown and, for each count, the day and how many seeds germinated in that interval. The calculator gives the final germination, the first count, the IVG, and the mean germination time.
200 seeds sown. Germinated: 60 on day 4, 50 on day 6, 30 on day 8 and 10 on day 10.
Final germination = 150 ÷ 200 = 75%. First count = 60 ÷ 200 = 30%.
IVG = 60/4 + 50/6 + 30/8 + 10/10 = 28.08. Average time = 880 ÷ 150 = 5.9 days.
There is no universal value. It is used to compare lots or treatments from the same test, under the same protocol.
Because a batch may germinate almost everything, but slowly or with weak seedlings. The first count and the IVG show this difference.
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.
© 2026 Agrocalcs. Found an error? Write to contato@agrocalcs.com.br.