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Overview |
Crop Production |
Crop Pattern |
Crop Yield |
Irrigation |
Soil Management |
Precision Farming |
Relevant Products |
Relevant Links
Producing probability maps to assess risk of exceeding critical threshold value of soil EC using geostatistical approach
Conclusion:
The case study above shows that non-parametric geostatistical approach can be applied to soil properties for assessing high risk area of contamination which requires some immediate remedial treatment and an effective management plan providing an informed decision support to help farmers. Traditional techniques do not provide any measurement of the reliability of the estimates; thus no risk assessment can be made. Currently, in most of the countries a little attempt in my knowledge has been made to advice farmers getting help in quantitative estimate of the probability exceeding certain threshold value or draws a probability map to find out which soil land required appropriate fertilizers or action to delimit zones requires urgent attention to control contamination. Therefore, it is useful to communicate the merits of the application of indicative kriging to agriculture area. Critical concentrations of EC or other soil properties have been recognized if the estimates are less than threshold values then farmers are advised to act and an appropriate and effective management plan can be developed. The soil may be lacking in major plan nutrients, show deficiencies or excesses of trace of elements or be too salty or alkaline where Farmers need to apply fertilizers to control salinity and alkalinity based on the geostatistical results.
References:
- Cressie, N. (1993), Statistics for spatial data, revised ed. John Wiley and Sons, New York. 900p.
- Deutsch, C.V. and Jorrnel, A. G. (1998), GSLIB: Geostatistical software library and user’s guide. Oxford University Press, New York, 370p.
- Goovaerts, P. and Journel, A. G. (1995) Integrating soil map information in modeling the spatial variation of continuous soil properties. European Jorurnal of Soil Sciences, 46, 397-414.
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