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Evaluation of Integrated Nutrient Management Interventions for Cotton (Gossypium hirsutum) on a Vertisol in Central India

Reddy, Dendi Damodar, Blaise, Desouza, Kumrawat, Bhagwan, Singh, Ashok Kumar
Communications in soil science and plant analysis 2017 v.48 no.4 pp. 469-475
Gossypium hirsutum, Vertisols, carbon, cotton, crop yield, farmers, field experimentation, nitrogen, nutrient management, nutrient uptake, phosphorus, potassium, poultry manure, soil nutrients, India
Phospho-compost (PC) and poultry manure (PM) were evaluated in field experiments to diversify integrated nutrient management (INM) for rain-fed cotton. Seed cotton yield in the PC (2501–2579 kg ha ⁻¹) was similar to the recommended INM (2673 kg ha ⁻¹) treatment and was significantly better than nitrogen, phosphorus and potassium (100% NPK) (2130 kg ha ⁻¹) and farmers practice (FP) (1886 kg ha ⁻¹). Yield was lower in the PM (2476–2617 kg ha ⁻¹) than in the PC. Nutrient uptake was higher in all INM intervention plots due to an improvement in soil nutrient status compared with those receiving 100% NPK. Soil labile carbon values were higher in the INM treatments (333–452 mg kg ⁻¹), with a greater magnitude in the PC-amended plots (402–452 mg kg ⁻¹). Carbon management index (CMI) values were higher for the INM than treatments NPK and FP. Among INM interventions, PC plots had higher values than the PM.