A technique for the measurement of relative amounts of dispersed humus in soil profiles. | [Gomal University Journal of Research • 1991]

Author(s):

1. S. A. Shahid: Soil Science Department, University of Agriculture, Faisalabad, Pakistan

2. D. A. Jenkins: University of Wales, Bangor, Gwynedd, UK

3. Akhtar Nawaz: Soil Science Department, Gomal University, Dera Ismail Khan, Pakistan

Abstract:

One soil profile i.e., Khurrianwala soil series was investigated to measure the relative amounts of the dispersed humus in the various soil layers. A technique has been developed which allows the measurements of dispersed humus indirectly from its optical density in a 1:5 soil : water ratio. A KONTRON UVKON-860 spectrophotometer was used at a fixed wavelength of 207 nm. The readings obtained were then plotted on paper through a kontron PLOTTER-800. The enrichement of the dispersed humus is found in two layers i.e. 45-50 and 65- 70cm and considered responsible in combination with dispersed clay to qualify the Khurrianwala soil series to be dense.

Page(s): 43-48

DOI: DOI not available

Published: Journal: Gomal University Journal of Research, Volume: 11, Issue: 2, Year: 1991

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