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Jurnal Kultivasi

Abstract

Andisols are characterized by high phosphorus (P) retention, which often limits P availability for crops. This study aimed to analyze the independent and interactive effects of P fertilizer and organic matter (i.e. manure and rice straw compost) on P retention, total P, available P, P uptake, soil pH, and cabbage yield. This research was conducted in pot experiments in plastic house, applying P fertilizer (0, 90, 180, 270 kg ha-1) and organic matter (20 kg ha-1 of chicken, sheep, cow manures and rice straw compost) on Andisols planted with cabbage. The experiment used a factorial randomized design. The results showed no significant interaction between P fertilizer and organic matter for all measured parameters. However, individual applications of organic matter, particularly manure, significantly improved P uptake, soil pH0, and cabbage yield, demonstrating its superior effectiveness compared to rice straw compost. Overall, manure application consistently outperformed rice straw compost in enhancing crop growth and P uptake. These findings underscore the importance of proper nutrient management strategies in Andisols to improve P availability and sustain optimal crop productivity

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