DETERMINATION OF ORGANIC FERTILIZER AMOUNT FROM AGRICULTURAL WASTE AS A REPLACEMENT FOR CHEMICAL FERTILIZER IN CABBAGE UNDER A CIRCULAR AGRICULTURE MODEL

Abstract

To achieve circular and sustainable agricultural production, one effective solution is the application of microbial product to process agricultural waste into organic fertilizers. A one-factor experiment was arranged in a completely randomized block design with five fertilizer treatments and three replications. The objective was to determine the amount of organic fertilizer processed with microbial product from agricultural waste as a replacement for chemical fertilizers on the growth, physiology, yield, quality of cabbage. The study indicated that replacing chemical fertilizers with organic fertilizers improved growth parameters, physiological traits, yield components, overall yield and cabbage quality. Among the treatments, treatment 3, which replaced 50% of the chemical fertilizer with organic fertilizer, significantly enhanced growth, physiological indices, yield components and actual yield compared to the other treatments and the control. The actual yield of treatment 3 was the significantly highest with 33.5 tons ha^-1, by 45.65% higher as compared with the control treatment (100% chemical fertilizer). Therefore, treatment 3 could be recommended for developing a cabbage production model that ensures safety while enhancing yield and quality.