FACTORS INFLUENCING THE SOIL PENETRATION RESISTANCE OF SOME VERTISOLS IN EGYPT. | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 1, Volume 27, Issue 8, August 2002, Page 5629-5636 PDF (870.34 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2002.255211 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Th. K. Ghabour; F. B. Labib; I. S. Rahim | ||||
| Soils & Water Use Dept., National Research Centre, Dokki, Cairo, Egypt. | ||||
| Abstract | ||||
| The current study aims to determine the soil penetration resistance of some Vertisols as well as to study the main contributing soil factors. Investigation of undisturoed sou samples, of eighteen profiles represent the Vertisols in E~ypt, showed that the soil penetration resistance ranges between 11.3 and 45.6 N/cm , as affected by different soil constituents and characteristics. The monovariant analysis reveals that clay content, water stable aggregates, total carbonates and organic matter contents are positively correlated with the soil penetration resistance. Whereas, the total soluble salts is negatively and non-significantly correlated to soil penetration resistance. However, none of the simple linear regression equations could represent this relationship or predict soil resistance values for given values of the soil factors. The multivariate analysis results in very highly significant multiple linear regression equation with high correlation coefficient, meaning that the computed equation could represent the relationship between soil penetration resistance and soil constituents and characteristics under consideration. The partial correlation analysis shows that water stable aggregates, clay content and total carbonates are the most effective soil factors on the soil penetration resistance and are followed by organic matter content and total soluble salts. As a conclusion, the soil penetration resistance is not a function of one soil factor but several factors. | ||||
| Keywords | ||||
| soil penetration resistance; Vertisols | ||||
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