The Effect of Bentonite, Poultry Manure and Elements on Some Chemical Properties of Sandy Calcareous Soil

This study was conducted to determine the effect of Bentonite mineral, poultry manure, and the addition of some elements on the chemical properties of the soil. The experiment was carried out in a split-plate design using completely randomized blocks (RCBD). The experiment included 81 experimental units resulting from the intersection of three levels of bentonite mineral (P 0 , P 1 , P 2 ) and three levels from poultry manure (M 0 , M 1 , and M 2 ) and three chemical elements: Magnesium, Zinc, and Copper (E mg , E zn , and E cu ) separately and the effect of these factors on the chemical properties, the results showed that the P 2 addition level to Bentonite mineral outperformed the rest of the levels in affecting the chemical properties, namely EC, PH, CEC, and OM. The M 2 addition level to poultry waste outperformed the rest of the levels in the chemical properties studied, EC, PH, CEC, and OM. The binary interactions between the metal and poultry manure showed a significant effect, and the P 2 M 2 treatment outperformed the rest of the treatments. As for the interaction between the metal and the chemical elements, the P 2 E zn treatment gave the best effect on the EC and CEC properties, while the P 2 E mg treatment gave the best effect on the PH and OM properties, and the interaction between Poultry manure and elements: the M 2 E zn treatment gave the best effect on the EC and CEC properties, while the M 2 E mg treatment gave the best effect on the PH and OM properties.