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International Journal of Soil Science
  Year: 2007 | Volume: 2 | Issue: 3 | Page No.: 190-196
DOI: 10.3923/ijss.2007.190.196
 
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Changes in Soil Organic Matter and Soil Aggregation of a Zambian Oxisol after Applying Lime

J. Manjoka , O.A. Yerokun , O.I. Lungu and K. Munyinda

Abstract:
In this study we investigated factors that contribute to poor crop response to lime. Soil samples were collected from three depth increments (0-15, 15-30 and 30-45 cm) in trial plots with the following treatments: lime only, urea only, urea + lime, no lime no urea-cultivated and fallow no lime (control). The samples were analyzed for Soil Organic Matter (SOM), exchangeable cations (Ca, Mg and K) and soil aggregate stability. The highest SOM content (36.8 g kg-1) was measured in the fallow plot and the least in the plot fertilized with urea. While exchangeable Ca increased in limed plots the level of exchangeable K decreased. The low SOM in fertilized plots was corroborated by the measured decrease in soil aggregate stability. Lime had a positive effect on soil aggregate size, but the best effect was obtained from the fallow plot. This study has shown that the effect of lime on acid soils is variable and probably soil specific. Therefore, in practice, soil amendment with lime has to be considered on a case by case basis.
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How to cite this article:

J. Manjoka , O.A. Yerokun , O.I. Lungu and K. Munyinda , 2007. Changes in Soil Organic Matter and Soil Aggregation of a Zambian Oxisol after Applying Lime. International Journal of Soil Science, 2: 190-196.

DOI: 10.3923/ijss.2007.190.196

URL: https://scialert.net/abstract/?doi=ijss.2007.190.196

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