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Effect of precision nitrogen management and plant stimulants on the growth and yield in a Rabi maize-summer groundnut cropping system 


Citation :- Effect of precision nitrogen management and plant stimulants on the growth and yield in a Rabi maize-summer groundnut cropping system. Crop Res. 60: 299-307
SUMIT RAY, SAGAR MAITRA, MASINA SAIRAM AND BISRUTI MAITY sagar.maitra@cutm.ac.in
Address : Department of Agronomy and Agroforestry, M. S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi-761 211, Odisha, India
Submitted Date : 23-07-2025
Accepted Date : 8-08-2025

Abstract

Maize has emerged as a key driver of crop diversification in rainfed and irrigated conditions due to its high yield potential, wider adaptability, and lucrative economic returns. When followed by a legume crop, the maize–groundnut sequential cropping system not only increases land and time use in a sequential cropping but also improves soil fertility through biological nitrogen fixation when legumes are considered in the system, residue contribution, and better nutrient recycling. The present study was conducted during 2024-25 at P. G. Research Farm of Centurion University of Technology and Management, Odisha. The treatment consisted of four levels of nitrogen application, viz., 100% recommended dose of nitrogen (RDN), i.e., 150 kg/ha; 125% RDN; N application through SPAD-based sufficiency index < 90-95%; and N application through NDVI-based GreenSeeker and three types of plant stimulants (potassium humate @ 25 kg/ha, seaweed extract at 25, 50, 75 DAS, @ 5%; and fulvic acid @ 2 ml/L). The study revealed that the highest growth attributes and yields were recorded in 180 kg/ha of nitrogen application, which remained statistically at par with SPAD-based SI ≥ 95%. Among plant-stimulants, significant values with the highest growth attributes and yields were recorded with potassium humate application at 25 kg/ha, and it remained significantly superior to all other plant-stimulant treatments of the study. The study concluded that integrating SPAD-based nitrogen management and potassium humate application @ 25 kg/ha could improve the growth and productivity of crops under the maize–groundnut sequential cropping system.

Keywords

Groundnut maize NDVI potassium humate sequential cropping SPAD 


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