As the cotton crops grow, they require essential nutrients for optimal growth and development. Fertilization is necessary to maintain soil fertility and promote healthy cotton plants. After four months of sowing, cotton plants need nutrients such as nitrogen, phosphorous, and potassium to reach maturity, produce bolls and fibers.
Before applying fertilizer, it’s crucial to check the pH level of the soil. The optimal pH for cotton farms should be 6.0-7.0. If the pH is higher or lower, adjust it by adding either lime or sulfur.
Nitrogen is a critical nutrient for cotton crops and is required for photosynthesis, plant growth, and protein production. Four months after sowing, nitrogen is necessary for the production of cotton bolls and is usually applied in a split application method. The first application of nitrogen should be done during the early flowering period to grow and promote vegetative growth, and the second application should be done just before boll formation.
Phosphorus plays an essential role in the root development, cell division, and reproductive growth of the cotton plant. Phosphorus requirements vary based on the soil type and crop yield potential. However, it is advisable to apply phosphorous as soon as possible after planting, as it helps with early root development and plant establishment.
Potassium is essential for the regulation of water balance in the cotton plant and increases the resistance to biotic and abiotic stresses. The application rate of potassium depends on the soil texture and crop potential yield.
In conclusion, the application of fertilizer in cotton crops four months after sowing is essential to promote vegetative growth, increase crop yield and improve fiber quality. A soil test is necessary to determine the nutrient requirements and ensure proper fertilization. Nitrogen, phosphorus, and potassium are the primary macronutrients required by cotton crops, and their application should be done according to the plant’s growth stages. Proper fertilization of cotton crop allows for a healthy and sustainable harvest.