Analysis of Macronutrients in Soil Using Impedimetric Multisensor Arrays

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Braunger, Maria Luisa ; Neto, Mario Popolin ; Kirsanov, Dmitry ; Fier, Igor ; Amaral, Lucas R. ; Correa, Flavio M. ; Correa, Daniel S. ; Paulovich, Fernando V. ; Legin, Andrey ; Oliveira, Osvaldo N., Jr. ; Riul, Antonio, Jr.

• Tipo de documento: Artigo Científico
• Fonte: ACS OMEGA; v. 9, n. 31, p. 10-pg., 2024-07-25.

Resumo

The need to increase food production to address the world population growth can only be fulfilled with precision agriculture strategies to increase crop yield with minimal expansion of the cultivated area. One example is site-specific fertilization based on accurate monitoring of soil nutrient levels, which can be made more cost-effective using sensors. This study developed an impedimetric multisensor array using ion-selective membranes to analyze soil samples enriched with macronutrients (N, P, and K), which is compared with another array based on layer-by-layer films. The results obtained from both devices are analyzed with multidimensional projection techniques and machine learning methods, where a decision tree model algorithm chooses the calibrations (best frequencies and sensors). The multicalibration space method indicates that both devices effectively distinguished all soil samples tested, with the ion-selective membrane setup presenting a higher sensitivity to K content. These findings pave the way for more environmentally friendly and efficient agricultural practices, facilitating the mapping of cropping areas for precise fertilizer application and optimized crop yield. (AU)

• Processo FAPESP: 18/22214-6 - Rumo à convergência de tecnologias: de sensores e biossensores à visualização de informação e aprendizado de máquina para análise de dados em diagnóstico clínico
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• Modalidade de apoio: Auxílio à Pesquisa - Temático
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• Processo FAPESP: 14/50869-6 - INCT 2014: em Eletrônica Orgânica INEO
• Beneficiário: Roberto Mendonça Faria
• Modalidade de apoio: Auxílio à Pesquisa - Temático