Improving properties of sandy soil and production of Phaseolus vulgaris cultivation using Azolla pinnata, eggshells, and biochar
Sandy soils are characterized by low organic matter content, weak nutrient retention, and limited water-holding capacity, which restrict crop productivity in arid and semi-arid regions. This study evaluated the individual and combined effects of biochar, Azolla pinnata, and eggshell powder on soil properties and the pr...