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. 21];11(1):94-100. Available from: https://jam.utq.edu.iq/index.php/main/article/view/165