EFFECT OF LONG-TERM NUTRIENT MANAGEMENTS ON MAIZE (Zea mays L.) YIELD AND SOIL FERTILITY UNDER MAIZE-SUNFLOWER CROPPING SEQUENCE

M. MALARKODI¹*, K. MITHILADEVI², B. GOKILA^3
1Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
²Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
³Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
* Corresponding Author : charmsmalar@gmail.com

Received : 01-05-2021     Accepted : 27-05-2021     Published : 30-05-2021
Volume : 13     Issue : 5       Pages : 10762 - 10765
Int J Agr Sci 13.5 (2021):10762-10765

Keywords : Permanent Manurial Experiment, Maize, SYI, SOC, Nutrients
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
Author Contribution : All authors equally contributed

The present investigation was carried out to study the effect of long term nutrient managements on maize crop yield and soil fertility in the on-going century-old Permanent Manurial Experiment of Tamil Nadu Agricultural University, Coimbatore. The post-harvest soil after harvest of 169th crop of maize was sampled and analyzed for physicochemical and chemical properties. Results revealed that the continuous adoption of STCR-IPNS practice has recorded the highest grain yield of 8213 kg ha-1 which was on par with NPK + FYM treatment (7618 kg ha-1). Continuous application of inorganic fertilizers alone registered pH > 8.0 whereas the application of fertilizers along with manures and application of manures alone registered pH < 8.0 in soil. Among the treatments, continuous application of INM and STCR-IPNS practices improved the cation exchange capacity, organic carbon content and available nutrient status in the soil whereas unbalanced fertilization decreased the most, resulted in degraded soil fertility

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