The study looked at soil quality in irrigated areas in the Algerian Sahara. They analyzed soil properties like organic matter, salinity, pH, and active limestone. The soil was found to be low in organic matter, very salty, and alkaline. The researchers used geostatistical methods to show how these properties vary across the area. They found that organic matter and pH have weak spatial patterns, salinity has moderate patterns, and active limestone has strong patterns. The range of variation was from 75 to 299 meters. The study suggests that agricultural practices affect soil properties and should be considered for sustainable land management.