Global Development in Soil Science Research: Agriculture Sensors and Technologies

Zeitoun, Reem; Chaudhry, Hiba; Vasava, Hitesh B.; Biswas, Asim

doi:10.1007/978-981-16-0917-6_29

Cited by 1 publication

(1 citation statement)

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“…Therefore, it is highly recommended to apply P fertilizers to soil on an as-needed basis to preserve the safety of water streams and the overall ecosystem. This has contributed to the development of reliable P detection methods that are fundamental in judging soil P fertility [6,7].…”

Section: Introductionmentioning

confidence: 99%

A Novel Paper-Based Reagentless Dual Functional Soil Test to Instantly Detect Phosphate Infield

Zeitoun

Adamchuk

Biswas

2022

Sensors

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Soil tests for plant-available phosphorus (P) are suggested to provide offsite P analysis required to monitor P fertilizer application and reduce P losses to downstream water. However, procedural and cost limitations of current soil phosphate tests have restricted their widespread use and have made them accessible only in laboratories. This study proposes a novel paper-based reagentless electrochemical soil phosphate sensor to extract and detect soil phosphate using an inexpensive and simple approach. In this test, concentrated Mehlich-3 and molybdate ions were impregnated in filter paper, which served as the phosphate extraction and reaction zone, and was followed by electrochemical detection using cyclic voltammetry signals. Soil samples from 22 sampling sites were used to validate this method against inductively coupled plasma optical emission spectroscopy (ICP) soil phosphate tests. Regression and correlation analyses showed a significant relationship between phosphate determinations by ICP and the proposed method, delivering a correlation coefficient, r, of 0.98 and a correlation slope of 1.02. The proposed approach provided a fast, portable, low-cost, accessible, reliable, and single-step test to extract and detect phosphate simultaneously with minimum waste (0.5 mL per sample), which made phosphate characterization possible in the field.

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Section: Introductionmentioning

confidence: 99%