Growing Cotton – Crop Nutrition 101
What you need to know about cotton fertilization, best practices, and more
Crop Nutrition Information for Growing Cotton (Gossypium hirsutum L.):
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Cotton peforms best in soil pH between 5.8 and 6.5
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Fertilizers are most efficient when soil pH is between 6-7
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Liming is recommender for fields with soil pH less than 6.0
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Cotton emerges quickest from warm, most soil
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Germination can be hindered by temperatures below 60F or less than adequate soil moisture
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Cotton is a DD60 crop which means it grows more slowly on days below 60F
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Cotton plant development, including vegetative and reproductive stages, is predictably regulated by environmental factors, heat accumulation dictates development as much as time
Cotton Field
Cotton Harvest
Key Nutrients:
- Nitrogen is integral for healthy cotton production
- The recommender best practice is to side dress N just before early square, which is closer to the period of substantial nutrient demand by the cotton plant
- In addition to N, Phosphorus (P), Potassium (K), Sulfur (S) and Boron (B) are nutrients of importance in cotton that must be managed properly for optimum fiber quality and lint yield.
Nutrient Removal by Cotton:
Nutrient balance is key to quality yields.
2 bales/A (cotton lint & seed lb/A) – (Alabama Extension: ANR-0449)
N – 63
P2O5- 25
K2O-31
Ca -4
Mg-7
S -5
Role of Nutrients:
Key quality and yield parameters can be affected by different nutrients. See how they can influence your harvest.
+ = improving
– = decreasing
+/- = different results, depending on the rate of nutrient applied
Yield: N++, P+, K++, Mg+, Ca+, S+ Quality: N+/-, P+, K++, Mg++, Ca++, S+