Fertilizer application and timely nutrient availability are cultivation techniques that are key to increasing leek productivity. Lowlands are a topography that provides an opportunity for developing leek planting areas. This study aims to determine the absorption capacity of leek plants for nitrogen, potassium, and phosphorus elements on chlorophyll levels and crop yields in the application of electrical induction and the provision of potassium phosphate fertilizer. Implementation April 2025, Location Malang Regency, East Java, Indonesia. Altitude 375 m, alluvial soil type. The research method uses a factorial randomized block design. Factor 1: Electrical Induction; ILo: without induction; ILa: 5 Ah electrical induction; ILb: 10 Ah electrical induction; ILc: 15 Ah electrical induction. Factor 2, administration of potassium phosphate. KP0: Without potassium phosphate; KPT: 2 ml-L potassium phosphate; KP2: 4 ml-L potassium phosphate; KP3: 6 ml-L potassium phosphate; Analysis of 5% F test, Tukey test, and Regression. The study revealed leaf area of 1168.23 cm2, economic weight 128.22 g, yield 12.78 tons-ha, nitrogen uptake 3.33 mg-100 g, potassium 3.37 mg-100 g, and phosphorus 0.78 mg-100 g. Biomass 1.60 tons-ha, chlorophyll content 50.99 ug-mL
Sugiarto et al. (Fri,) studied this question.