Effect of Natural Zeolite (Clinoptilolite) and Urea on the Growth of Amaranthus gangeticus, Clinachantus nutans and Capsicum annuum. J. Teknol. [Internet]. 2014 Apr. 23 [cited 2026 Sep. 13];68(1). Available from: https://journals.utm.my/jurnalteknologi/article/view/2896