The Use of Organic Fertilizer on Red Onion Crops Fertilized with Different Doses of NPK in the Acid Dry Land

Abstract

ABSTRACT

The cultivation of shallots on acidic dry land has high potential, despite the condition of soil pH and low nutrients, and increasing productivity can be done by using organic poultry manure and NPK fertilizer together. This study aims to obtain the best treatment of a combination of organic and inorganic fertilizers on the growth and production of shallots (Allium ascalonicum L.), using RAK environmental design and factorial patterned treatment design with 9 treatment combinations replicated 3 times. As factor I. Type of organic fertilizer (O), namely none (o₀), chicken manure organic fertilizer (o₁), and vegetable waste organic fertilizer (o₂).  As Factor II. Percentage of NPK fertilizer (p), namely 25% (p₁), 50% (p₂) and 75% (p₃).  The highest production was achieved in the combination of chicken manure organic fertilizer with a 50% NPK fertilizer dose, with a production of 1.76 kg/plot, equivalent to 7.04 tons/ha, and increased by 117.28% compared to no organic fertilizer with 25% NPK fertilizer.