Arid
DOI10.1016/j.still.2017.01.006
Assessment of spatial variability of soil properties using geospatial techniques for farm level nutrient management
Vasu, Duraisamy1; Singh, S. K.1; Sahu, Nisha1; Tiwary, Pramod1; Chandran, P.1; Duraisami, V. P.2; Ramamurthy, V.3; Lalitha, M.3; Kalaiselvi, B.3
通讯作者Vasu, Duraisamy
来源期刊SOIL & TILLAGE RESEARCH
ISSN0167-1987
EISSN1879-3444
出版年2017
卷号169页码:25-34
英文摘要

Crop productivity under rainfed farming systems in India is low due to poor water and nutrient management. The available small scale information of soil nutrients is inadequate to effectively manage individual farms held by small and marginal farmers. Large scale spatial variability assessment using grid sampling method is a feasible option to identify critical nutrient deficiency zones. The present study was conducted in a part of semi-arid tropical Deccan plateau region, India, to assess the spatial variability of soil pH, organic carbon (OC), soil available nitrogen (N), phosphorus (P), potassium (K) and sulphur (S). A total of 1508 composite samples (0-15 cm) were collected by adopting 325 x 325 m grid interval (one sample for 10 ha area) and they were analysed for soil fertility parameters. Coefficient of variation (CV) indicated that OC, N, P, K and S were high in heterogeneity (CV > 35%). Moreover, pH, P, K and S were non normally distributed and log transformation produced normalised dataset. The semivariogram parameters (nugget to sill ratio, range and slope) indicated that the spatial distribution of soil properties were inconsistent. The spatial variability of parameters were mapped by ordinary kriging using exponential (pH and OC) and spherical (N, P, K and 5) models selected based on root mean square error (RMSE) and r(2) values. Multi-nutrient deficiencies were observed in most parts of the study area and N was acutely deficient. Farm level nutrient availability status was derived from spatial variability maps and critical nutrient deficiency zones were identified. Nutrient management recommendations based on soil test results were delivered to farmers for adopting need based variable rate of fertilizer application. The generated maps can serve as an effective tool for farm managers and policy makers in site specific nutrient management. (C) 2017 Elsevier B.V. All rights reserved.


英文关键词Deccan plateau Geostatistical techniques Site specific nutrient management Spatial variability Soil fertility
类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000397690400004
WOS关键词TROPICAL INDIAN ENVIRONMENTS ; PLANT-AVAILABLE POTASSIUM ; SEMIARID TROPICS ; GANGETIC PLAINS ; CARBON STOCKS ; LAND-USE ; DEFICIENCIES ; EDAPHOLOGY ; VERTISOLS ; FIELD
WOS类目Soil Science
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/202451
作者单位1.ICAR Natl Bur Soil Survey & Iand Use Planning, Nagpur 440033, Maharashtra, India;
2.Tamil Nadu Agr Univ, Directorate Nat Resource Management, Coimbatore 641003, Tamil Nadu, India;
3.ICAR Natl Bur Soil Survey & land Use Planning Bur, Reg Ctr, Bengaluru 560024, Karnataka, India
推荐引用方式
GB/T 7714
Vasu, Duraisamy,Singh, S. K.,Sahu, Nisha,et al. Assessment of spatial variability of soil properties using geospatial techniques for farm level nutrient management[J],2017,169:25-34.
APA Vasu, Duraisamy.,Singh, S. K..,Sahu, Nisha.,Tiwary, Pramod.,Chandran, P..,...&Kalaiselvi, B..(2017).Assessment of spatial variability of soil properties using geospatial techniques for farm level nutrient management.SOIL & TILLAGE RESEARCH,169,25-34.
MLA Vasu, Duraisamy,et al."Assessment of spatial variability of soil properties using geospatial techniques for farm level nutrient management".SOIL & TILLAGE RESEARCH 169(2017):25-34.
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