Effect of STCR based Nutrient Management on Quantity- Intensity Relationship of Potassium in Rice based Cropping Systems of Indo Gangetic Plains

Author: Shailja Kumari, Priyanka Kumari*, Ragini Kumari, Rajeev Padbhushan, Anshuman Kohli3, Varsha Kumari, Kirti Kumari and Gopal Kumar

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Abstract

The present investigation examined different parameters of Quantity-Intensity (Q/I) relationship from study conducted during kharif, 2019 in Bihar Agricultural University, Sabour, Bhagalpur. The study was undertaken to check the effect of different approaches of fertilizer application under targeted yield based soil test crop response (STCR) method on Q/I relationship of potassium (K) under rice based cropping systems. Soil K fertility is often judged on the basis of K extraction by the method of neutral normal Ammonium acetate which has been unsuccessful in indicating cropping induced changes in soil. Therefore, Q/I relationship of K proves to be a better indication of K supplying power of soil. The hypothesis of present study was to know the actual K supplying power of the soil so that better estimation of K status could be made. For the present study, soil samples (0-15 cm) were collected from ongoing STCR experimental plots receiving nine different treatments which comprised of con

Keywords

Potassium, Quantity- Intensity (Q/I), soil test crop response (STCR), Integrated Plant Nutrient System (IPNS), randomized block design, potential buffering capacity.