@article{MAKHILLRJSWM20101328925,
    title = {Anderson Field-Level Variability of a Lunnyu-Affected Soil in Masaka, Central 
  Uganda},
    journal = {Research Journal of Soil and Water Management},
    volume = {1},
    number = {3},
    pages = {68-75},
    year = {2010},
    issn = {2075-1095},
    doi = {rjswm.2010.68.75},
    url = {https://makhillpublications.co/view-article.php?issn=2075-1095&doi=rjswm.2010.68.75},
    author = {P.,M.M.,B. and},
    keywords = {VESPER,vesper,Lunnyu soils,spatial variability,management,subsoil,Uganda},
    abstract = {The study aimed at characterizing the distribution of lunnyu 
  soils in the Lake Victiria Basin of Uganda at field and landscape level. At 
  field-level, soil samples were collected from the center point square grids 
  obtained by laying a 180x180 m plot. At spacing of 20x20 m, 81 sampling points 
  were georeferenced and samples taken at two depths (0-20 and 20-40 cm). And 
  an additional 19 random locations within the plot were taken to make a total 
  of 100 sampled locations. The soil properties analyzed were texture, pH, available 
  P and exchangeable bases. Variograms that were used to describe the spatial 
  structure of the soil properties were generated in VESPER (Variogram Estimation 
  and Spatial Prediction with ERror) Version 1.6. All the soil properties, except 
  silt showed spatial dependence at both depths at the scale of study. Phosphorus, 
  Ca, Na and sand showed shorter ranges of between 42 and 58 m all in the top 
  soil but the other properties in top and subsoil have larger ranges of 149 m. 
  Overall, the spatial distribution of the soil properties in the sampled lunnyu 
  patches are not straightforward. In order to resolve the lunnyu problem, objective 
  identification of lunnyu patches should be sought followed by careful monitoring 
  of crop performance u nder different soil fertility management interventions.}
    }