STUDY OF CHEMICAL AND FERTILITY PROPERTIES IN SOME KARBALA WHEAT FIELDS BY USING GIS.

The study area was located in Karbala Governorate, represented by the coordinates which were shown according to the location of each profile. The geographic information systems technology that was used for studying some chemical characteristics such as soil salinity, degree of reaction, organic matter and some fertility characteristics represented available elements (nitrogen, phosphorous and potassium). The results indicated that there are several pedons, approximately 70-80% of them affected by salts, to increase their productivity, the soil needs to be reclaimed. The study field also showed that most soil pedons have had a low content of organic matter, as their values ranged from 10.1-18.3 gm.kg-1 in the range of 12-14 gm. Kg-1, as well as for the degree of reaction. The fertility characteristics were represented by nitrogen, the values were limited between (18.1 - 27.4) mg.Kg-1, for phosphorus was (9.5 -20.3) mg. Kg-1, while potassium (128-277) mg.Kg-1. which has Low content in most of the study sites, which indicates the need for fertilization operations to increase the production of these sites. [ABSTRACT FROM AUTHOR]