Modification of colorimetric method based digital soil test kit for determination of macronutrients in oil palm plantation
作者机构：Department of Farm Machinery&PowerFaculty of Agricultural Engineering&TechnologyUniversity of AgricultureFaisalabad(38040)Pakistan Department of Biological and Agricultural EngineeringFaculty of EngineeringUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Department of Allied Health SciencesSargodha Medical CollegeUniversity of Sargodha(40100)Pakistan Leibniz Institute for Agricultural Engineering and BioeconomyMax-Eyth-Allee 10014469 Potsdam-BornimGermany Department of Environmental Sciences&EngineeringGovernment College University Faisalabad(38000)Pakistan
出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)
年 卷 期：2020年第13卷第4期
页 面：188-197页
核心收录：
学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：This research was supported by Universiti Putra Malaysia in coordination of United Melaka Bhd.(UMB)
主 题：digital soil test kit variable rate fertilizer applicator oil palm NPK measurement data acquisition system colorimetric method
摘 要：It is the need of time that oil palm farmers must perform the spatially planned soil analysis to know about the fertilizer sufficient and deficient zones of *** method is a suitable and fast solution of soil analysis for NPK determination using the digital soil test *** determination procedure with a digital soil test kit was undefined for oil ***,the digital soil test kit determines the passage of light through an opaque medium of soil solution with a specified ***,environmental light may interfere leading to wrong results of NPK ***,this equipment was non-incorporable with the controller of any VRT fertilizer *** this research,these issues were addressed and the NPK measurement procedure was defined for oil palm plantation by modifying the‘soil to water’ratio in sample soil solution with an optimum environmental light range of 18-23 W/m^(2).‘Soil to water’ratios were found for nitrogen,phosphorus and potassium as 0.31 to 5.00,1.00 to 5.00 and 4.50 to 5.00,respectively to fit the requirement of NPK for oil palm in the prescribed range of the *** study of modified digital soil test kit showed that 91.7%N,89.6%P and 93.8%K results of modified digital soil test kit were matched with analytical laboratory ***,the reliability of NPK results using digital soil test kit was enhanced,making the kit incorporable with the controller of variable rate fertilizer applicator through remote monitoring based data acquisition *** outcome of this research can be used in the development of an IoT network data fusion for dynamic assessment of the NPK variation in the soil and nutrient management in oil palm plantations.
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