HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Ameyan, O. Search for Related Content PubMed Articles by Ameyan, O. Agricola Articles by Ameyan, O.

Surface Soil Variability of a Map Unit on Niger River Alluvium¹

ABSTRACT

Examination of an adequate number of sample points is a prerequisite for valid generalizations in soil surveys. The number of sample points required depends upon a host of factors, including the spatial variability of the properties under investigation. This study examines the spatial variability of textural and chemical soil properties in the surface horizon of two sample areas mapped as Ozugbi series (Typic Humaquepts). From a knowledge of the dispersion characteristics of the soil properties, the number of sample points required to estimate each property at different levels of precision was determined. There were marked contrasts in the variability levels of the soil properties, and, hence, in the number of samples required to estimate each property, between the sample sites and within the map unit as a whole. The pH is the least variable of the properties examined and, hence, needs the smallest number of samples for estimation.

¹ Contribution from Univ. of Ilorin Senate Research Grant, Univ. of Ilorin, P.M.B. 1515, Ilorin, Nigeria.

² Senior Lecturer, Dep. of Geography, Univ. of Ilorin.

Received for publication March 30, 1984.

This article has been cited by other articles:

				M. I. Stutter, L. K. Deeks, and M. F. Billett Spatial Variability in Soil Ion Exchange Chemistry in a Granitic Upland Catchment Soil Sci. Soc. Am. J., July 1, 2004; 68(4): 1304 - 1314. [Abstract] [Full Text] [PDF]