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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Alveno, Vitho
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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Evaluation of phosphorus fertilizer rate based on Upland Soil Test Kit analysis for tomato fertigation Alveno, Vitho; D. Susila, Anas; Suketi, Ketty; Maharijaya, Awang
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 52 No. 2 (2024): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v52i2.52177

Abstract

Upland Soil Test Kit (PUTK) is a rapid soil analysis kit that estimates the nutrient availability in soil. From previous studies, tomato plant production showed a good correlation with available phosphorus (P) and potassium (K) analysis using the PUTK. This study aimed to find the optimal P fertilizer rate based on PUTK analysis for tomato fertigation. This experiment was carried out using a randomized complete block design, four replications with a single factor, namely P fertilizer rate comprising 0% X, 50% X, 100% X, 150% X, and 200% X, with X the recommended P fertilizer of PUTK on moderate P availability (175 kg ha­1). The ANOVA showed that P fertilizer did not significantly affect the vegetative growth, production, and fruit quality of tomatoes. It means that PUTK analysis had low accuracy as a basis for determining the optimum P fertilizer rate for tomato fertigation. The low accuracy could be due to PUTK underestimating the status of soil P availability. Mechlich-1 analysis showed that the experimental field had high P availability (44.6 ppm), while PUTK analysis still indicates moderate P availability. This shows that PUTK needs to be developed further, especially quantifying the result to help make informed and accurate decisions. Keywords: precision farming; precision fertilization; Upland Soil Test Kit; FERADS; sustainable agriculture
Co-Authors Anas Dinurrohman Susila Awang Maharijaya Ketty Suketi