Así lo destaca Diego Golombek, científico y divulgador para quien comunicar la ciencia requiere rigurosidad y aprovechar al máximo los recursos disponibles, como la ficción y el humor. En un tono reflexivo evalúa el rol de la comunicación institucional y, además, plantea que el desafío actual de la educación técnica es “mantener lo bueno y avanzar hacia lo nuevo”.
Trabajos en Prensa
Selection of bands and spectral indexes associated to the effective soil depth in the Southern Pampean region of Argentina
Recibido 10 de junio de 2019 // Aceptado 28 de julio de 2020 // Publicado online 27 de enero de 2021
FROLLA, F.D.1 ; ZILIO, J.P.1 ; KRUGER, H.1
ORIGINAL PAPER IN SPANISH
ABSTRACT
The Pampeana Region, in the southwest of the Buenos Aires province (Argentina), is characterized by the presence of a calcareous subsurface horizon with limiting water retention capacity and root penetration. The objective of the work was to propose and validate a methodology for the selection of satellite images scenes showing high correlation between reflectance and soil depth spatial variation. Six fields under agriculturallivestock production were studied. For them 180-190 layers of information were derived from bands and spectral indices of LANDSAT 5 TM satellite for 1992-2011 periods. In these fields, observations of effective soil depth (PES) were made and scenes showing the highest correlation between reflectance and PES were selected. The model was validated using an independent dataset and error indexes (RMSE, MAE and R2 ). No supremacy of any band or index was observed across the sites and dates. Sites with low relative PES and values well distributed in the 0-100 cm range obtained higher R2 coefficients. The review of long series of satellite LANDSAT 5 TM images using the proposed methodology allowed the identification and selection of scenes with a good reflectance/PES correlation.
Keywords: soil depth, precision agriculture, remote sensing, Landsat, R.
1 Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria (EEA) Bordenave, Ruta 76 km 36,5, Bordenave, Argentina. Correo electrónico: frolla.franco@inta.gob.ar
