Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
International Journal of Agricultural Research
  Year: 2007 | Volume: 2 | Issue: 11 | Page No.: 888-899
DOI: 10.3923/ijar.2007.888.899
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Spatial Data Calibration for Site-Specific Phosphorus Management

S.K. Balasundram, D.J. Mulla and P.C. Robert

Abstract:
Accounting for spatial variability of soil properties commonly requires intensive soil sampling, which inevitably involves a high cost. Geo-spatial statistical tools enable characterization of spatial variability and development of sampling strategies from limited data. This study outlines a simple approach of using classical and geo-spatial statistics to understand the spatial variability of soil Phosphorus (P) and discusses its relevance to sampling strategy and variable rate P application. The Bray (I) extractable-P data, obtained from a previous study, was first explored using descriptive statistics, box plot and normal quantile plot analyses. Spatial description of the data was performed using qualitative (data posting) and quantitative (variography) methods. Information derived from the fitted semivariogram was used to perform data interpolation (kriging). A management zone concept was used to delineate the Bray P test values. Results showed that Bray P exhibited a strong spatial dependence with 94% of its variability explained. The spatial correlation length was 177 m. Spatial attributes of the data appeared to justify the sampling design employed with regard to sample size, spacing and arrangement. To facilitate variable rate P application, three management zones were established so as to receive low, moderate and high P rates, respectively.
PDF Fulltext XML References Citation Report Citation
 RELATED ARTICLES:
  •    Effectiveness of Kriging Interpolation Technique for Estimating Permeability Distribution of a Field
  •    Spatial Variability of Soil Physico-chemical Properties in Kadawa Irrigation Project in Sudan Savanna Agroecology of Nigeria
  •    Paddy Field Zone Characterization using Apparent Electrical Conductivity for Rice Precision Farming
How to cite this article:

S.K. Balasundram, D.J. Mulla and P.C. Robert, 2007. Spatial Data Calibration for Site-Specific Phosphorus Management. International Journal of Agricultural Research, 2: 888-899.

DOI: 10.3923/ijar.2007.888.899

URL: https://scialert.net/abstract/?doi=ijar.2007.888.899

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

Curve Bottom