What is the recommended time for applying NPK fertilizer to cotton crops in Tamil Nadu?
Cotton crops in Tamil Nadu require appropriate nutrient management for healthy growth and maximum yield. NPK fertilizers, which contain nitrogen (N), phosphorus (P), and potassium (K), are commonly used to supply these essential nutrients to plants. The timing of NPK fertilizer application is crucial to ensure that the plants receive the nutrients they need at the right stages of growth.
To provide a comprehensive overview of the recommended time for applying NPK fertilizer to cotton crops in Tamil Nadu, here's a table that breaks it down on a days-wise basis with the recommended NPK ratios:
| Growth Stage | Nutrient Requirements | Recommended Time for NPK Fertilizer Application | NPK Ratio (by weight) |
|---|---|---|---|
| Pre-Planting | Soil preparation | Incorporate well-decomposed organic matter or | N/A |
| compost before planting | |||
| Sowing | Seedbed preparation | Apply basal dose of NPK fertilizer during | N/A |
| seedbed preparation | |||
| Vegetative Stage | Nitrogen (N) | Apply NPK fertilizer 25-30 days after sowing | 4:2:1 |
| (when the plants have established a good root | |||
| system and started developing leaves) | |||
| Reproductive Stage | Phosphorus (P) | Apply NPK fertilizer 40-45 days after sowing | 2:4:1 |
| (for flower and boll formation) | |||
| Potassium (K) | Apply NPK fertilizer 60-65 days after sowing | 2:1:2 | |
| (for overall plant health and boll development) | |||
| Boll Development | Potassium (K) | Apply NPK fertilizer during boll development | N/A |
| (if required based on plant vigor and nutrient | |||
| deficiency symptoms) | |||
| Harvesting | Post-harvest care | Apply NPK fertilizer to replenish soil nutrients | N/A |
| for subsequent crops or as recommended |
It is important to note that the recommended NPK ratios mentioned in the table are given as a general guideline. However, the specific ratios may vary based on factors such as the specific cotton variety, local climate, and soil conditions. Farmers are encouraged to conduct soil tests before planting to determine the existing nutrient levels and consult with local agricultural experts or experienced cotton farmers for more precise recommendations tailored to their region.
Ensuring proper fertilization practices, combined with good agricultural management, can contribute to healthy cotton crop growth and improved yields in Tamil Nadu.