Title:	Temporal optimization of UAV-based pasture monitoring using multi-year NDVI and precipitation data in Lagoinha/SP, Brazil.
Authors:	NOGUEIRA, S. F. SANTOS, T. T. BAYMA, G. SANTOS, P. M. SANO, E. E. BOLFE, E. L.
Affiliation:	SANDRA FURLAN NOGUEIRA, CNPMA; THIAGO TEIXEIRA SANTOS, CNPTIA; GUSTAVO BAYMA SIQUEIRA DA SILVA, CNPMA; PATRICIA MENEZES SANTOS, CPPSE; EDSON EYJI SANO, CPAC; EDSON LUIS BOLFE, CNPTIA.
Date Issued:	2025
Citation:	In: WORKSHOP CIENTÍFICO DO CENTRO DE CIÊNCIA PARA O DESENVOLVIMENTO EM AGRICULTURA DIGITAL – SEMEAR DIGITAL, 2., 2025, Campinas. Anais [...]. Piracicaba: ESALQ/USP, 2025. p. 360-366.
Description:	This study identifies the optimal period for using unmanned aerial vehicle (UAV) imagery to assess pasture conditions in the municipality of Lagoinha, São Paulo State, Brazil. It combines long-term precipitation data (1948‒2024) and NDVI time series derived from Sentinel-2 satellite (2017‒2024) for 15 partner properties of the Science Center for the Development of Digital Agriculture - Semear Digital. The results show that the transition from rainy to dry season, especially in May and June, provides the best pasture contrast conditions for UAV monitoring. During this time, intermediate NDVI values (0.45‒0.55) enhance the differences between well-managed and degraded pastures, while lower precipitation and cloud cover conditions improve the radiometric quality of images. Farms with higher technology adoption show more stable NDVI profiles, facilitating the vegetation condition detection. This study provides a framework for planning UAV-based pastureland assessments to support better pastureland monitoring and management decisions.
Thesagro:	Pastagem Precipitação Pluvial
Keywords:	Veículo aéreo não tripulado NDVI
DOI:	https://doi.org/10.1590/S1678-3921.pab2026.v61.03851
Type of Material:	Artigo em anais e proceedings
Access:	openAccess
Appears in Collections:	Artigo em anais de congresso (CNPMA)