Analysis of Macronutrients in Soil Using Impedimetric Multisensor Arrays

Author(s):Show less -

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.

• Document type: Journal article
• Source: ACS OMEGA; v. 9, n. 31, p. 10-pg., 2024-07-25.

Abstract

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)

• FAPESP's process: 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis
• Grantee: Osvaldo Novais de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 15/14836-9 - 3D printing technology application for microfluidic developments
• Grantee: Maria Luisa Braunger Fier
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/50869-6 - INCT 2014: on Organic Electronics
• Grantee: Roberto Mendonça Faria
• Support Opportunities: Research Projects - Thematic Grants