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Soybean value
How is soybean maturity calculated?
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8 Replies
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Soybean maturity is calculated based on growth stages and environmental factors
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Soybean maturity is primarily calculated <mark>based on the time it takes for pods to reach their mature, gray, tan, or brown color and for the leaves to drop</mark>. This period is influenced by photoperiod (day length) and temperature, with shorter day lengths and warmer temperatures promoting flowering. Maturity is also categorized into maturity groups (MG) ranging from 00 (northern latitudes) to 8 (southern latitudes), with later maturity groups being more sensitive to photoperiod.
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The calculation of soybean maturity involves tracking the growth stages from planting to harvest. R7 (physiological maturity) is typically used as the key marker for when soybeans are mature enough for harvest. However, other factors like the maturity group, environmental conditions, and time from planting also play an important role in determining the optimal harvest time.
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Soybean maturity is primarily calculated based on photoperiod (day length) and heat units.
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1. Days after planting: Soybeans typically mature 90 – 130 days after planting, depending on: variety, climate, rainfall / irrigation, maturity group
2. Visual and physical signs of maturity
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Soybean maturity is determined by a combination of factors, including genetics, photoperiod, and growing degree days (GDD), which are used to classify soybean varieties into maturity groups.
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