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Long-Term Effects of High Application Rates of Npk Fertilizer on Tensil Strength and Water Stability of the Soil Structure.

Hadas, Aviva and Quinton, John N. (1990) Long-Term Effects of High Application Rates of Npk Fertilizer on Tensil Strength and Water Stability of the Soil Structure. Geoderma, 47 (3-4). pp. 381-392. ISSN 0014-7061

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Abstract

Intensive agricultural practices are thought to cause soil structure deterioration. The work reported herein aims to study and analyze the long-term effects exerted by high application rates of N,P,K fertilizer on soil structure as characterized by tensile strength, stability to water, friability, and bulk density of its structural units. No differences were found in the organic matter content between the control and the fertilized plots. Bulk density increased with diminishing the aggregates' diameter and this was attributed to shrinkage and not to differential effects brought about by different N,P,K amounts. In the dry state the structure was more friable and “smaller grained” under high P and without N fertilizers. Water stability was not affected by the differential N,P.K treatments when compared with the control.

Item Type: Article
Journal or Publication Title: Geoderma
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 13184
Deposited By: Dr John Quinton
Deposited On: 11 Feb 2009 16:41
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:06
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/13184

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