IITA Research Guide 2

Soil sampling and sample preparation
Joseph L. Pleysier

July 1995 




Abstract. The approach to soil sampling depends on the reasons for soil analysis. Soil is not a homogeneous mass. Plant life, topography, agronomic practices, etc. affect the uniformity of a soil. The accuracy of the soil analysis data depends on the accuracy with which the soil samples are taken.

Objectives, Study materials, Practicals
Questions
 
1 Nature of soil variation
2 Number of samples required
3 Judgment sampling
4 Simple random sampling
5 Stratified random sampling
6 Systematic sampling
7 Sources of error
8 Sub-sampling and composite sampling
9 Sampling tools and sample preparation
10 Bibliography
11 Suggestions for trainers
   
Credits

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