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On the Importance of Soil Homogeneity when Evaluating Field Trials

On the Importance of Soil Homogeneity when Evaluating Field Trials The existence of strong heterogeneity of soils on a scale of plots for field trials is demonstrated by a trial for fodder crops on a Lithic Rendoll in Upper Bavaria, Germany. Initial basic (pH, Corg, Ccarb texture) as well as physical (saturated hydraulic conductivity, bulk density, pore size distribution) soil properties vary strongly across a single plot. Due to the great extent of these variations, the effects of preceding and succeeding crops on soil structural properties within a subplot or subsubplot can only be evaluated with high uncertainty. The effect of weather on soil structural properties during the 18 month trial period must also be considered. Therefore, (i) no sampling of the soil at the end of the trial was done, and (ii) surveying the soil before designing field trials is recommended. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

On the Importance of Soil Homogeneity when Evaluating Field Trials

Journal of Agronomy and Crop Science , Volume 174 (1) – Feb 1, 1995

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References (15)

Publisher
Wiley
Copyright
Copyright © 1995 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1111/j.1439-037X.1995.tb00192.x
Publisher site
See Article on Publisher Site

Abstract

The existence of strong heterogeneity of soils on a scale of plots for field trials is demonstrated by a trial for fodder crops on a Lithic Rendoll in Upper Bavaria, Germany. Initial basic (pH, Corg, Ccarb texture) as well as physical (saturated hydraulic conductivity, bulk density, pore size distribution) soil properties vary strongly across a single plot. Due to the great extent of these variations, the effects of preceding and succeeding crops on soil structural properties within a subplot or subsubplot can only be evaluated with high uncertainty. The effect of weather on soil structural properties during the 18 month trial period must also be considered. Therefore, (i) no sampling of the soil at the end of the trial was done, and (ii) surveying the soil before designing field trials is recommended.

Journal

Journal of Agronomy and Crop ScienceWiley

Published: Feb 1, 1995

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