Indian Journal of
Science and Technology
 
 
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Issue No:11 Vol.4
November-2011
ISSN: 0974-5645
Science and Technology Education Viewers & PDF
32. Study of variability of some map unit properties and incorporating FAO method and GIS techniques in land suitability evaluation for barley.
Shahram Ashraf, Ruzanna Manoukyan, Shamsollah Ayoubi and Hossein Abbaspour.

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  • Abstract
    The quality of soil maps depends on their ability to exhibit the soil variability. This study aims to investigate the soil spatial  variability in S2 unit of a semi-detailed qualitative suitability map (1:50000 scale) for irrigated barley. Forty nine soil samples were collected in land unit 2.1 at 0-20 cm depth using regular network sampling method to determine the content of salinity (EC) , alkalinity (ESP), Caco3, pH, Organic Carbon (OC), Caso4, Sand, Silt  and Clay parameters. The  greatest variability observed in the OC (Coefficient of variation = 300) and Caso4 (Coefficient of variation=0.40) respectively. The obtained result showed that the incorporating of  FAO method and GIS techniques in land suitability evaluation for barley gave lower estimate of land index and yield than FAO methods alone (Storie and Square Root methods). The better accordance between estimated yield potential and observed yield potential by Square Root-Kriging method  revealed that  it was more accurate  than the conventional FAO methods alone.
  • Keywords: Barley, Crop, Land, Soil properties, Spatial variability, Suitability map, Iran.