Legumes & Pulses· Glycine max
Soybean Growing Guide
Major oilseed and protein crop. Nitrogen-fixing legume that improves soil fertility. Used for food, feed, and industrial products.
How Long Does Soybean Take to Grow?
Soybean is typically ready to harvest about 100 days after planting.
Growing Conditions
Soil Requirements
Soil Type & pH
Best soil types: loam, silt loam, clay loam
pH range: 5.5 - 6.5 (optimal: 6)
Drainage: good
Nutrient Needs (N-P-K)
Planting Guide
Yield & Economics
Common Pests & Diseases
Common Pests
- Soybean aphid
- Bean leaf beetle
- Japanese beetle
- Stink bugs
- Spider mites
Common Diseases
- Soybean rust
- Phytophthora root rot
- Sudden death syndrome
- White mold
- Brown stem rot
Use AI crop disease detection to identify issues early and prevent crop losses.
Growing Tips
Inoculate soybean seed with Bradyrhizobium japonicum bacteria before planting in fields without recent soybean history — this enables nitrogen fixation.
Soybeans fix their own nitrogen, so they rarely need N fertilizer. Applying nitrogen actually reduces nodulation and wastes money.
Plant when soil temperature reaches 13°C — soybeans are sensitive to cold soil and germinate poorly below 10°C.
The R1-R5 growth stages (flowering through seed fill) are the critical water demand period — irrigation during this window has the highest yield return.
Harvest at 13% seed moisture for direct combine harvest. Delay increases pod shatter losses, especially with dry weather and wind.
Soybeans are an excellent rotation crop before corn — they leave 40-80 kg/ha of nitrogen credit in the soil from fixation.
Frequently Asked Questions
How long does Soybean take to grow?
Soybean typically takes 100 days from planting to harvest. Seeds germinate in about 7 days. The best planting season is spring, early summer.
What soil does Soybean need?
Soybean grows best in loam, silt loam, clay loam soil with a pH of 5.5-6.5. Good drainage is required.
What temperature does Soybean need?
Soybean grows best at 20-30°C. Frost tolerance: none. Heat tolerance: moderate.
What is the expected yield for Soybean?
Across 13 countries with grounded data, reported national yields for Soybean range from 1,000 to 4,120 kg/hectare, with a median of 2,970. These are national statistics, not a best-case figure — an individual farm's yield depends on variety, climate, soil and management.
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