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2022. EFFECT OF ENRICHMENT BIOCHARE BY NITROGEN AND USED AS SLOW RELEASE FERTILIZER ON NITROGEN AVAILABILITY AND YIELD OF OKRA (Ablemoscus esculentus L. Moench) PLANT. University of Thi-Qar Journal of agricultural research. 11, 1 (Aug. 2022), 94–100. DOI:https://doi.org/10.54174/utjagr.v11i1.165.