OVERVIEW
- Muriate of Potash (MOP) and boron (B) are common fertilizers used in cotton production.
- Potassium (K), magnesium (Mg), and sulfur (S) are macronutrients needed for a balanced crop nutrition program in cotton.
- Magnesium is critical for photosynthesis, heat-stress tolerance, disease resistance, crop quality, and lint yield.
- Higher yields combined with lower atmospheric sulfur (S) deposition has accelerated the need for S on cotton.
- K-Mag is a unique 3-in-1 nutrient source that features low chloride, water soluble nutrients, and does not affect soil pH; regardless of application rate.
TRIAL DETAILS
Locations and Crop Management:
Crop: Cotton (Gossypium hirsutum L.)
Years: 2018-2019
Locations: 10 trials AL, LA, MS, NC, SC, TN
Data Source: Field studies conducted by universities or independent third-party researchers.
Cropping Conditions: All trials conformed to local cropping practices.
Experimental Design: Small-plot RCBD with 4 replications.
N Rate: Applied according to local recommendations
P Rate: Applied according to local recommendations
K Rate: 120 lbs K2O/ac as either MOP or MOP (110) + K-Mag (10)
B Rate: 0.5 lbs as Foliar B across all treatments
Application Details:
- MOP and MOP + K-Mag: Preplant broadcast incorporated.
- Foliar B: Early bloom foliar.
RESULTS
SUMMARY
- Replacing a small amount of MOP with K-Mag increased cotton yield by 45 lbs lint/ac averaged across 10 trials (2018 – 2019).
- The K, Mg, and S found in K-Mag provide a great source of necessary macronutrients (primary and secondary) to provide a balanced crop nutrition program in cotton.
- Access additional yield data, technical information, and resources at CropNutrition.com
