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EFFECT OF ENRICHMENT BIOCHARE BY NITROGEN AND USED AS SLOW RELEASE FERTILIZER ON NITROGEN AVAILABILITY AND YIELD OF OKRA (Ablemoscus esculentus L. Moench) PLANT. UTJagr [Internet]. 2022 Aug. 10 [cited 2024 Nov. 7];11(1):94-100. Available from: https://jam.utq.edu.iq/index.php/main/article/view/165