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Use of Correlation Relationships to Enhance Understanding of Pedogenic Processes and Use Potential of Vertisols and Vertic Inceptisols of the Bale Mountain Area of Ethiopia
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yerima, B. P. K. Ranst, E. Van Verdoodt, Ann |
| Copyright Year | 2009 |
| Abstract | Summary Five Vertisols and two Vertic Inceptisols developed from basalt and alluvial materials were characterized for physical and chemical properties. Correlative statistical relationships were established among physical and chemical properties including cation exchange capacity (CEC), percent total clay, electrical conductivity (EC), base saturation % (BS), pH-H 2 O, pH-KCl, CaCO 3 equivalent, organic carbon (OC), total nitrogen (TN), P-Bray and P-Olsen. Correlative relationships were established among parameters for all horizons of the soils studied as well as among parameters within individual horizons. P-Olsen was highly correlated with OC and TN; simple coefficients of determination (r 2 ) were 0.81 and 0.69, respectively. CaCO 3 was highly correlated with pH-H 2 O and pH-KCl; r 2 values were 0.68 and 0.60, respectively. Similar correlations were obtained for pHKCl vs pH-H 2 O and pH-KCl vs EC, with r 2 values of 0.92 and 0.70, respectively. Total nitrogen was also very highly correlated with OC (r 2 = 0.88). Base saturation was highly correlated with pH-KCl and pH-H 2 O giving r 2 values of 0.62 and 0.64, respectively. When correlative relationships were carried out among parameters within individual horizons very high correlation coefficients were obtained for OC vs TN (r= 0.98 - 1.00), OC vs P-Olsen (r= 0.96 - 0.99), BS vs pH-KCl (r= 0.82 - 1.00), BS vs pH-H 2 O (r= 0.86 - 1.00). Most of the simple correlation coefficients obtained for EC with pH-KCl and pH-H 2 O were > 0.81. High correlation coefficients (0.80 - 1.00) were obtained for % clay vs total CEC for most soils studied. Regression relationships developed constitute useful predictive indices for estimating agronomic properties from existing physical and chemical data and soil survey reports of the Bale Mountain area of Ethiopia. This study has demonstrated that statistical correlation can be used to cross-check the quality of analytical data both among horizons of different soil profiles and within individual soil profiles from prior established relationships. |
| Starting Page | 223 |
| Ending Page | 232 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| Volume Number | 27 |
| Alternate Webpage(s) | http://www.tropicultura.org/text/v27n4/223.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
