Influence of auxiliary soil variables to improve PXRF-based soil fertility evaluation in India

Dasgupta, Shubhadip; Chakraborty, Somsubhra; Weindorf, David C.; Li, Bin; Silva, Sérgio Henrique Godinho; Bhattacharyya, Kallol

doi:10.1016/j.geodrs.2022.e00557

Cited by 6 publications

(2 citation statements)

References 62 publications

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“…The HSV model's V component is particularly suitable for the SMART NP application [16]. SMART NP is a novel mobile app created with Apache Cordova (v10.0.0) [25], designed to analyze soil NO 3 − without requiring an internet connection. In the soil sample mode, users enter details, select, or capture an image, correct image orientation using EXIF data, and resize it to 1080p.…”

Section: Image Analysis and Smart Np Developmentmentioning

confidence: 99%

A Smartphone-Enabled Imaging Device for Chromotropic Acid-Based Measurement of Nitrate in Soil Samples

Lavanya,

Nayak,

Deb Roy

et al. 2023

Sensors

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In this study, a novel chromotropic acid-based color development method was proposed for quick estimation of soil nitrate (NO3−). The method utilized a 3D printed device integrated with the rear-end camera of a smartphone and a stand-alone application called SMART NP. By analyzing the mean Value (V) component of the sample’s image, the SMART NP provides instant predictions of soil NO3− levels. The limit of detection was calculated as 0.1 mg L−1 with a sensitivity of 0.26 mg L−1. The device showed a % bias of 0.9% and a precision of 1.95%, indicating its reliability. Additionally, the device-predicted soil NO3− data, combined with kriging interpolation, showcased spatial variability in soil NO3− levels at the regional level. The study employed a Gaussian model of variogram for kriging, and the high Nugget/Sill ratio indicated low spatial autocorrelation, emphasizing the impact of management factors on the spatial distribution of soil NO3− content in the study area. Overall, the imaging device, along with geostatistical interpolation, provided a comprehensive solution for the rapid assessment of spatial variability in soil NO3−content.

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Section: Image Analysis and Smart Np Developmentmentioning

confidence: 99%

A Smartphone-Enabled Imaging Device for Chromotropic Acid-Based Measurement of Nitrate in Soil Samples

Lavanya,

Nayak,

Deb Roy

et al. 2023

Sensors

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“…Therefore, there must be a standardized set of parameters to consider when looking into soil fertility for different soil samples. [10] describes different parameters that are required for soil fertility prediction in a traditional setup, and how to gather them using lab-based techniques. [10, Table 1] summarizes these parameters and the techniques used to extract them.…”

Section: Understanding Soil Parametersmentioning

confidence: 99%