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Soil spatial variability characterization: Delineating index-based management zones in salt-affected agroecosystem of India

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Title Soil spatial variability characterization: Delineating index-based management zones in salt-affected agroecosystem of India
Not Available
 
Creator Arijit Barman
Parvender Sheoran
Rajender Kumar Yadav
Ramesh Abhishek
Raman Sharma
Kailash Prajapat
Ranjay K. Singh
Satyendra Kumar
 
Subject Spatial variability
Soil management zones
Salt-affected soils
Gypsum requirement
Fertilizer recommendations
Sustainable production
 
Description Not Available
Farm level recommendation in salt-affected agricultural landscapes is practically difficult due to spatial variations in inherent soil salinity, diverse farming situations and associated land ownerships with small-scale production systems. This study presents spatial array analysis of 354 geo-referenced soil samples revealing widespread heterogeneity in soil sodicity and fertility status across salt-affected Ghaghar basin of Kaithal district in Haryana, India. Six principal components accounted for 73% of the total variability, and the most important contributors [electrical conductivity (ECe), sodium adsorption ratio (SAR), DTPA extractable copper (Cu) and boron (B), soil organic carbon (OC) and available phosphorus (AP)] as minimum data set were used to develop the soil quality index (SQI). Geostatistical analysis revealed Circular (ECe and AP), Exponential (SAR, OC and B) and Gaussian (Cu) as the best fit semivariogram ordinary kriging model with weak to moderate spatial dependence. Three soil management zones (SMZs) were delineated by grouping the entire area based on soil quality index (SQI). Fertilizer recommendations for rice-wheat cropping system in different SMZs were calculated using soil test crop response (STCR) equation to ensure balanced fertilization, resource saving and reducing environmental footprints. Gypsum requirement map was prepared for systematic allocation and distribution, and enabling farmers to precisely use the mineral gypsum in order to reclaim and reduce stresses led by sodic lands. The implications of this study showed zone-specific advocacy for gypsum application (as soil ameliorant) and balanced fertilization in sustainable restoration of sodic lands, improving nutrient use efficiency and stabilizing crop production in salt-affected regions of India and similar ecologies elsewhere.
ICAR under Farmer FIRST Project
 
Date 2021-07-23T09:26:52Z
2021-07-23T09:26:52Z
2021-07-13
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/49573
 
Language English
 
Relation Not Available;
 
Publisher ELSEVIER