DefinePK

Abstract

Abstract | For the purpose of assessing the state of soils suitability to cultivate spelt and rice with spatial analysis based on complementarity between field investigations and laboratory tests with Sentinel data, this study carried out in Ghammas county of Iraqi Diwaniyah governorate between two Circles of latitude of 31 ° 37 ‘08.9732 “N to 31 ° 43’ 23.2848” N two lines of longitude of 44 ° 32 ‘27.1115’ E to 10.446 “E. The study comes up to the existence of five series of DM115, DM86, DM96 and MM11 belong to Typic Torrifluvents. The study discovered that the geochemical soil of the area has an original calcareous alluvium, with a decrease in lime amount, most of which consists of secondary lime from irrigation operations carrying it with an abundance of calcium carbonate which has a fundamental role in the physical and chemical behaviour of soil. The study showed that the suitability of study area soils to cultivate spelt indicated the absence of the item Highly Suitable (S1) while the rest of the items; Moderately Suitable (S2), Marginally Suitable (S3), Currently not Suitable(N1) and Permanently not Suitable (N2) occupied 14.46%, 67.27%, 14.21% and 4.06% of the study area, respectively. While the suitability of study area soils series to cultivate rice indicated the absence of the item Highly Suitable (S1) while the rest of the items; Moderately Suitable (S2), Marginally Suitable (S3), Current not Suitable (N1) and Permanently not Suitable (N2) occupied 11.32%, 72.96%, 12.91% and 2.81% of the study area, respectively. The study also found that 43.82% of the study area is mostly cultivated with spelt plant, the bushland occupied 29.61% while the rest of the area without vegetation through NDVI values for March. The DM115 series exceeded the MM11 in having a healthy spelt vegetation and bright green growth. The NDVI values, measured in July (the Iraqi dry season), also showed the effected absence of rice plant in the study area measuring a high difference between the NDVI values during spring (the spelt growing season) and its values in July (the rice growing season). In this study, it is reckoned that integrating the results of field investigations and laboratory tests with Sentinel2 data are important to obtain indicators for the management of some Ghammas soils to assess its suitability for rice, the district most famous plant, and spelt plant imposed by the current situation.