GORS 2(16) Spectral behavior for the effect of geographical zones on chickpea crop growth and yield

Abstract

Abstract: This investigation was conducted by the Al-Suwayda government to study the effect of Geographical zones by spectral reflectance data during growth stages on chickpea yield during the 2014/2015 season. Al-Suwayda government ranked first in crop area and fourth in seed productivity in Syria. Two chickpea varieties (Gab3 as wintry and Baladi as spring season) were planted at two sowing dates (ideal and late) in two Geographical zones (plain and mountain). The experiment was planted according to a split-split plot design with three replicates for each variety. Statistical analysis results showed the highest productivity in the mountainy site (94.7 g.m-2) meanwhile in the plain site (65.6 g.m-2). Spectral data of the mountainy site recorded the highest values for Normalized Difference Vegetation Index /NDVI/ (0.77), Normalized Difference Greens Index /NDGI/ (-0.0417), and Normalized Difference Water Index /NDWI1/ (0.016) at date (18/4), respectively. NDVI values represent a higher sustained vigor of plants planted at mountainous sites more than at plain sites during different growth stages, associated with fresh weight, chlorophyll content index CCI, and leaf area index LAI characteristics. NDGI showed the activity of photosythtical in plants grown at mountainy site meanwhile the plain site for associated with chlorophyll content index CCI characteristic.