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Potted Moringa oleifera plants in the greenhouse grown using control soil, Superhydrophobic sand (SHS), Engineered biochar (EB), and their combination (SHS+EB). The EB was mixed with the sandy soil (inset) and pots were filled with the soil under each treatment. White silica sand layer on top of the pots is for either the SHS mulch or SHS+EB treatments; control pots represent the pots without SHS or EB treatment.
