Journal of Crop Production and Processing

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The present study was conducted in Mollaahmad watershed of Ardabil city in 1390 to evaluate the canonical correlation between tillage erosion [slope gradient and position], and grain yield and barley yield components (Sahand cultivar) in order to determine the covariability between the two sets of variables to (1) detect simultaneously occurring patterns in the interdependencies sets of canonical variables, and (2) to prepare the possibility of canonical correlation coefficient use in a predictive mode for the variation of barely yield. For this purpose plant sampling was done from dry farming land of three landscapes and from four slope positions. The findings of canonical correlation analysis indicated that there are optimal linear combinations between sets of canonical variables of slope gradient and position and barely yield components that the amount of this correlation is identified by 77 percent. According to this correlation, when the slope gradient increases with 28 percent and slope position changes from down to up slope with 96 percent, the dry matter by 8 percent, spike number by 1.1 percent and grain yield by 22 percent will decrease, and the spike weight by 2.12 percent and 1000 grain weight by 14 percent will increase that spike weight and slope position had the largest role in the forming of first canonical correlation coefficient compared to other canonical variants. Using this test, which distinguishes the importance and the role of soil erosion variants in barley yield, high prediction of spike weight by slope position is clear also slope position as a part of soil erosion indices has no similar worth toward slope gradient and the differences are dramatic. Whereas, slope position effect on crop yield is evaluated differently from slope gradient. genotypes.

Keywords: Soil productivity, Canonical correlation coefficient, Tillage erosion, Canonical variables.

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