Soil salinity is considered the most serious socio-economic and environmental problem in arid and semi-arid regions. This study was done to estimate the soil salinity and monitor the changes in an irrigated palm grove (42 ha) that produces dates of a high quality. Topsoil samples (45 points), were taken during two different periods (May and November), the electrical conductivity (EC) and Sodium Adsorption Ratio (SAR) were determined to assess the salinity of the soil. The results of the soil analysis were interpolated using two geostatistical methods: inverse distance weighting (IDW) and ordinary Kriging (OK). The efficiency and best model of these two methods was evaluated by calculating the mean error (ME) and root mean square error (RMSE), showing that the ME of both interpolation methods was satisfactory for EC (−0.003, 0.145) and for SAR (−0.03, −0.18), but the RMSE value was lower using the IDW with both data and periods. This can explain the accuracy of the IDW interpolation method. This model showed a dominance of soil salinity distribution in the South and South-East of the study area during the first season, and for the second season, the salts were concentrated in the middle of the area. Several factors could interact in this variation such as the topographic direction of the water flow and the aridity of the climate (evaporation). From this study emerges the need to maintain a better management of agricultural water and soils, avoiding salt accumulation, to ensure a good yield and the sustainability of agriculture in arid environments.

The purpose of this study is to monitor the evolution of some physical and physico-chemical parameters of four types of compost prepared from the mixture of oasis waste and poultry manure in different proportions. During the trial, which lasted 218 days, the temperature rises during the thermophilic phase for all the treatments, reaching a maximum threshold of 55°C recorded by the treatment (poultry manure (PM) + mixture of residues (wheat straw + olive residues) (MI)). The pH, EC, nitrogen, phosphorus and potassium values increase for all treatments at the end of the test. On the other hand, the MO content and C/N ratio are significantly reduced during the trial, especially for treatments containing poultry manure. The results obtained show that the four prepared composts meet the characteristics of a stable, hygienic product suitable for use in poultry farming.