A b s t r a c t. Tannery wastes can be used in soil as organic manure. The aim of this research was to study the effects of tannery wastes (before a chromium addition step) and biochar on soil chemical and physicochemical properties and radish yield. Treatments included three levels of tannery waste (0, 2.5, and 5%) and two levels of biochar (0 and 2.5 t ha -1 ) in a completely randomized design (factorial) with three replications. The treated pots were kept under field capacity condition for three months; thereafter, five radish seeds were sown at 1 cm depth in soil of each pot.
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