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Potassium fractions in black soil mediated by integrated nutrient management modules under maize-chickpea cropping
C K Dotaniya1, B L Lakaria2, Yogesh Sharma1
1Department of Soil Science & Agricultural Chemistry, College of Agriculture, Bikaner, India.
Plos One
|September 29, 2023
Summary
Integrated nutrient management (INM) significantly improves soil potassium (K) fractions. Applying farmyard manure (FYM) in maize and chickpea proved most beneficial for enhancing K availability in low-fertility soils.
Area of Science:
- Soil Science
- Agronomy
- Nutrient Management
Background:
- Soil potassium (K) is crucial for crop yield and quality.
- Integrated Nutrient Management (INM) strategies aim to optimize nutrient use efficiency.
- Low soil fertility, particularly low potassium levels, is a challenge in many agricultural regions.
Purpose of the Study:
- To evaluate the impact of various INM modules on soil potassium fractions.
- To identify the most effective INM strategy for improving soil K availability.
- To provide insights for sustainable potassium fertilizer management.
Main Methods:
- A field experiment was conducted using a randomized block design (RBD) with three replications.
- Twelve INM treatments, including inorganic, organic, and combined approaches, were applied under a maize-chickpea cropping sequence.
- Soil samples were analyzed for water-soluble, available, exchangeable, HNO3-extractable, lattice, and total potassium fractions at crop harvest.
Main Results:
- All INM modules significantly influenced soil potassium fractions (p = 0.05).
- Various INM strategies demonstrated a significant enhancement in soil K availability.
- Treatment 11, involving 20 t ha-1 farmyard manure (FYM) in maize and 5 t ha-1 FYM annually in chickpea, was the most effective in improving soil K fractions.
Conclusions:
- Integrated nutrient management modules are effective in improving soil potassium fractions.
- Specific INM practices, like the application of FYM in a maize-chickpea sequence, can significantly boost soil K availability.
- These findings are vital for optimizing potassium management in crops grown in soils with limited fertility.
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