Crops 1 Drip irrigation 1 El-Salam Canal 1 El-salam canal 1 Flood irrigation 1 Heavy metals 1 Manganese removal (water treatment) 1 Polluted water 1 Potato crop 1 Potato plants Sand 1 Sandy soils 1 Sandysoil 1 Soil layer 1 Soil pollution 1 Soils 1 Sprinkler irrigation 1 Sprinkler systems (irrigation) 1 Tubes (components) 1 Water pollution 1 Zinc 1 drip irrigation 1 flood irrigation 1 heavy metals 1 potato crop 1 sandy soil 1 sprinkler irrigation 1