EVALUATION OF SOIL MAP EFFICIENCY FOR NORTH TIKRIT AGRICULTURAL PROJECT

S. Ahmed, Saad; Z. Al-Janabi, Khudayer

	EVALUATION OF SOIL MAP EFFICIENCY FOR NORTH TIKRIT AGRICULTURAL PROJECT
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 15, Issue 1, 2015, Pages 118-127
Authors
Saad S. Ahmed; Khudayer Z. Al-Janabi
Abstract
This study aimed to use some soil map quality standards such as the relative homogeneity, correlation coefficient and weighted purity to determine the credibility (Soil map unit reliability)of soil map for "North Tikrit Agricultural project". the project area is located between latitudes (34o 45 ' 3 '') and (35o 44 ' 50 '') to the North and longitudes (42o 40 ' 43 '') and (43o 44 ' 4 '') in the east. Four map units represent four soil series of the project are selected and a transect line passes throughout these map units was drawn. Three locations per each soil map unit (series) were located on the transect beginning the locations of these points were determined in the field using a GPS instrument after their coordinations were derived from a corrected land sat image overlayed on the soil map of the project. twelve Pedons representing these locations were and four soil samples of each pedon represent, the following depths: exposed (0_25), (25_50), (50_75) and (75-100) cm. were collected for some chemical and physical analysis. Soil reaction (PH), (EC), (CEC), (O.M), (Gypsum), (Lime), (SAR), (ESP), (Pb) and (P.S.A), were determined and statistically processed using SPSS system. The results showed that the purity of the map units and examine the credibility (25.14%) before changing a map ,While the purity after re-separation units map (after changing the map) and by way of the proposed similarity (61.84%) This is the surveyor goal to get the highest possible purity .
Keywords
Soil survey evaluation; Soil map criteria; soil map units

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