1. Soil variability: a review;Beckett;Soils and Fertilisers,1971
2. Remote sensing to detect nitrogen deficiency in corn;Blackmer,1995
3. A new method for spatially moving correlation analysis in geomedicine;Bølviken;Environmental Geochemistry and Health,1997
4. Effect of daily soil temperature fluctuations on soil electrical conductivity as measured with the Geonics® EM-38;Brevik;Precision Agriculture,2004
5. Statistics for Spatial Data;Cressie,1993