I am an Agricultural Engineer (National University of Colombia, 2021) and currently an M.Sc. candidate in Agricultural Engineering at FEAGRI-UNICAMP, Brazil. My research in Digital Agriculture focuses on developing interpolation models for low-density soil-fertility sampling scenarios. I work with soil sampling, spatial image analysis, spatial variability, soil–yield correlations, interpolation methods, and erosion modeling using remote-sensing data.
EDUCATION
Agricultural engineer from National University of Colombia, now doing my master degree at University of Campinas
RESEARCH, TEACHING, or OTHER INTERESTS
Agricultural and Biological Sciences, Soil Science, Engineering, Computer Science Applications
EFFECT OF INTERPOLATION METHODS ON THE GENERATION OF FERTILIZER PRESCRIPTION MAPS UNDER LIMITED SAMPLING SCENARIOS Laura D. Bejarano, Agda L. G. Oliveira, Henrique Oldoni, Dario C. Sánchez, Lucas R. do Amaral Engenharia Agricola, 2025 In precision agriculture (PA), the evaluation of soil spatial variability to optimize crop management requires dense sampling. This costly activity often results in sparser sampling grids and may compromise both map quality and the return on variable rate fertilizer applications. This study evaluated whether the choice of interpolation method influences the quality of fertilizer prescription maps under sampling limitations. In two areas with different amounts of samples and degrees of spatial dependence, the interpolation of phosphorus (P) and potassium (K) contents was evaluated using deterministic methods (TPS, IDW) that consider mathematical functions based on distance, stochastic methods (OK, KED) that consider the spatial autocorrelation of the data, and machine learning methods (SVM, RFSI) that learn complex relationships. TPS demonstrated superior performance in predicting content, and the agreement of fertilization classes (Lin’s correlation coefficient and Kappa’s agreement index were higher). However, considering the recommendation classes, the differences between the methods were reduced. Thus, if this approach to creating recommendation maps is adopted, the interpolator can be selected based on the simplicity of the method, with TPS being a promising alternative.
Stress Evaluation Using Finite Elements in a Manual Agricultural Tool Laura Delgado-Bejarano, Hugo González-Sánchez, Germán García-Monsalve Ingenieria E Investigacion, 2024 This study addresses the imperative need for efficient hand-held agricultural tools, particularly in challenging contexts like hillside agriculture, by focusing on the redesign and evaluation of a manual tillage tool. The objective is to comprehensively assess the stress and fatigue life of a redesigned tool, considering different manufacturing materials such as steels (AISI/SAE 4140, 4130, 1060), A356 aluminum, and nodular cast irons. Employing finite element method simulations and the Von Mises equation, this research confirms an optimal performance within elastic limits for all materials, mitigating the risks of plastic deformation or breakage during normal operation, with Von Mises stresses ranging from 8.39 to 16.30 MPa. All the tools yielded optimal results, meeting the critical requirements for soil penetration resistance, reporting no fatigue failures, and exhibiting useful life values over 1.75 x 1013 years. In terms of ergonomics, A356 aluminum stands out, as it is less heavy and implies a lower effort by the operator, promoting efficient tillage without compromising comfort. This research provides nuanced insights for the design of agricultural tools, emphasizing the harmonious balance between efficiency, longevity, and operator comfort in sustainable practices.
SOIL EROSION BY HAND TOOLS FOR SMALL-SCALE TILLAGE ON HILLSLOPES ASSESSED THROUGH THE UNIVERSAL SOIL LOSS EQUATION Laura Delgado Bejarano, Hugo González Sanchez, Dario Castañeda Sánchez Chilean Journal of Agricultural and Animal Sciences, 2023 The objective of this study was to evaluate and compare the erosion rates generated by two types of hand tools for small-scale tillage on a hillslope, using experimental tests and the Universal Soil Loss Equation (USLE). The hand tools evaluated were a conventional hoe and a redesigned furrowing hoe. The experimental work was conducted in a 145 m2 plot with an average slope of 45% in Colombia. Three treatments were evaluated: a) Zero tillage and no herbicide (control); b) tillage with a conventional hoe plus herbicide; c) tillage with a furrowing hoe plus herbicide. Each treatment was represented by a sedimentation plot, using three repetitions in blocks (lower, middle, and upper parts of each plot), according to the maximum slope gradient. Both hand tillage tools generated high to extremely high erosion rates with differences of up to 8.1 times between them. Both types of tools accelerated soil erosion rates, being higher in furrowing hoe tillage. The USLE method showed no differences in erosion rates between the tillage methods, while differences were found in the experimental tests. This is explained by the lower sensitivity of the USLE to detect small-scale changes in factors such as soil type, cover, and slope.
Conversion model of soil pH values with two extraction matrices in Urabá, Colombia Laura Delgado Bejarano, Sebastián Zapata-Henao, Darío Antonio Castañeda Sánchez, Miguel Ángel Bernal Monterrosa Acta Agronomica, 2023 La acidez es una de las principales propiedades del suelo y tiene relación directa e indirecta con propiedades físicas, químicas y biológicas. Su valor se determina a través de la medición del pH, metodología que varía entre los diferentes laboratorios, para lo cual las matrices de disolución más usadas son el agua destilada (H2O) y el cloruro de potasio (KCl), que dan información sobre la acidez activa y potencial, respectivamente. El objetivo del presente artículo es proponer una estrategia para relacionar los valores de pH mediante ambos métodos de extracción; para esto se realizó un muestreo de suelo a 4 puntos/hectárea en una finca bananera de la zona de Urabá, Antioquia, con el fin de generar los modelos de regresión entre el pH determinado en una solución KCl [1M] y en H2O, bajo dos proporciones de disolución (suelo:solución) de 1:1 y 1:2. El modelo más representativo para la zona estudiada se da con la relación 1:2, bajo una regresión polinómica de tercer grado guiada por la ecuación pHKCl = -0.12 +2.31 -13.41 +28.10, que arrojó un coeficiente de determinación (R2) de 83.91 % y un error cuadrático medio (RMSE) de 0.27. Adicionalmente, no se encontraron diferencias significativas entre las dos proporciones de disolución evaluadas. De esta forma, se puede concluir que para la zona de Urabá es posible usar modelos matemáticos para la conversión de valores de pH en H2O a KCl y viceversa, lo que permite estimar los valores de acidez potencial para su respectiva neutralización.
RELATIONSHIP BETWEEN SOIL ACIDITY AND PRODUCTIVITY OF BANANA (Musa spp.) IN URABÁ, COLOMBIA Laura Delgado Bejarano, Diego Alexander Calle, Sindy Paola Cardona, Darío Castañeda Sánchez, Miguel Ángel Bernal, Sebastián Zapata Henao Chilean Journal of Agricultural and Animal Sciences, 2023 Soil acidity plays an important role in the productivity of export bananas as it affects nutrient availability and phytotoxicity depending on soil pH. The objective of this research was to evaluate the relationship between soil pH and banana productivity in Uraba, Colombia. The study was conducted at the Ramiro Jaramillo Sossa experimental station, Banana Research Center (Cenibanano), Urabá, Antioquia. The sampling grid consisted of 110 points. Determination of pH was conducted in situ, and soil samples were processed in the laboratory using two solutions: distilled water and KCl. Significant differences were found between the solutions, aluminum extraction and field sampling. Additionally, the presence of Al3+ was confirmed in the pH range H2 O 5.5. Finally, the pH values were pH KCl pH H2 O pH in-situ. The latter best explained the behavior of bunch weight, indicating that in situ determination of pH better reflects the real conditions of this variable, with a greater relationship with productivity.
RECENT SCHOLAR PUBLICATIONS
Replication data for: Performance of interpolation methods in digital soil mapping: the influence of data characteristics LD Bejarano, LR Amaral Bejarano, Laura Delgado , 2026 2026.0
Performance of interpolation methods in digital soil mapping: the influence of data characteristics L Delgado Bejarano, A Loureiro Gonçalves Oliveira, JV Fiolo Pozzuto, ... Precision Agriculture 27 (1), 10 , 2026 2026.0 Citations: 1
Complementarity of proximal soil sensing techniques for mapping clay and chemical quality index JVF Pozzuto, LD Bejarano, H Oldoni, LR Amaral Precision agriculture'25, 453-459 , 2025 2025.0 Citations: 2
Potential of interpolation methods for modelling the spatial variability of soil parameters LD Bejarano, DA Castañeda, LR Amaral Precision agriculture'25, 909-915 , 2025 2025.0 Citations: 1
Physicochemical variation in banana soils of Urabá Colombia: comparison between two decades. MAB Monterrosa, LD Bejarano, FFF Mercado 2025.0
EFFECT OF INTERPOLATION METHODS ON THE GENERATION OF FERTILIZER PRESCRIPTION MAPS UNDER LIMITED SAMPLING SCENARIOS LD Bejarano, ALG Oliveira, H Oldoni, DC Sánchez, LR Amaral Engenharia Agrícola 45 (spe2), e20250055 , 2025 2025.0
Variación fisicoquímica en suelos bananeros de Urabá Colombia: Comparación entre dos décadas MA Bernal Monterrosa, L Delgado Bejarano, FF Fonseca Mercado 2025.0
Stress Evaluation Using Finite Elements in a Manual Agricultural Tool L Delgado-Bejarano, H González-Sánchez, G Garcia Ingeniería e Investigación 44 (2), e104844 , 2024 2024.0 Citations: 6
Propiedades fisicoquímicas de suelos en características morfológicas del banano (Musa spp.) en cuatro fincas de Urabá-Antioquia EJ Causil-Pastrana, MAB Monterrosa, L Delgado-Bejarano, ... Temas Agrarios 29 (2), 200-210 , 2024 2024.0 Citations: 1
Variabilidad espacial de propiedades fisicoquímicas en suelos bananeros de Urabá-Colombia J Perez-Zapata, L Delgado-Bejarano, J Osorio-Cardona, ... ACORBAT REVISTA DE TECNOLOGÍA Y CIENCIA/ACORBAT JOURNAL OF TECHNOLOGY AND … , 2024 2024.0 Citations: 3
The impact of vegetation cover on soil erosion in the drainage network of banana crop LD Bejarano, DAC Sánchez, JJP Zapata, MÁB Monterrosa, LMV Arias, ... Agronomía Colombiana 42 (3), 14 , 2024 2024.0
Evaluación de pérdida de suelos en plantaciones de banano (Musa AAA) en la zona de Urabá, Colombia LD Bejarano, JD Osorio, JJP Zapata, MÁ Bernal Acorbat Revista de Tecnología y Ciencia 1 (1) , 2024 2024.0
Modelo para la conversión de valores de pH del suelo con dos matrices de extracción en Urabá, Colombia L Delgado Bejarano, S Zapata Henao, DA Castañeda Sánchez, ... Acta Agronómica 72 (4), 324-329 , 2023 2023.0
Relationship between soil acidity and productivity of banana (Musa spp.) in Urabá, Colombia L Delgado Bejarano, DA Calle, SP Cardona, D Castañeda Sánchez, ... Chilean journal of agricultural & animal sciences 39 (2), 228-238 , 2023 2023.0 Citations: 3
Relación de la productividad en fincas bananeras con el perfil de los racimos en Urabá-Antioquia MÁ Bernal, LD Bejarano, EJC Pastrana, LJA Guerra Temas agrarios 28 (2), 140-148 , 2023 2023.0 Citations: 1
Soil erosion by hand tools for small-scale tillage on hillslopes assessed through the universal soil loss equation L Delgado-Bejarano, H González-Sánchez, D Castañeda-Sánchez Chilean journal of agricultural & animal sciences 39 (1), 75-89 , 2023 2023.0 Citations: 2
Evaluación de dos técnicas de decoloración en raíces para determinación de simbiosis micorrícica en banano (Musa spp.) MÁ Bernal, LD Bejarano, SZ Henao, EJC Pastrana Temas agrarios 27 (2), 385-396 , 2022 2022.0 Citations: 1
Proyección de rendimiento usando variables productivas y diversos tipos de semilla de banano (Musa spp.) en Turbo-Colombia. M Bernal Monterrosa, L Delgado Bejarano Ciencia y Agricultura 19 (3), 102-115 , 2022 2022.0 Citations: 5
Laura Delgado Bejarano 1✉ Email laura. bejarano@ feagri. unicamp. br Agda Loureiro Gonçalves Oliveira 1 João Vitor Fiolo Pozzuto 1 Dario Castañeda Sánchez 2 Lucas Rios LD Bejarano
Evaluación de dos técnicas de decoloración en raíces para determinación de simbiosis micorrícica en banano (Musa spp.) Evaluation of two root bleaching techniques to determine … MÁ Bernal-Monterrosa, L Delgado-Bejarano, S Zapata-Henao, ...
MOST CITED SCHOLAR PUBLICATIONS
Stress Evaluation Using Finite Elements in a Manual Agricultural Tool L Delgado-Bejarano, H González-Sánchez, G Garcia Ingeniería e Investigación 44 (2), e104844 , 2024 2024.0 Citations: 6
Proyección de rendimiento usando variables productivas y diversos tipos de semilla de banano (Musa spp.) en Turbo-Colombia. M Bernal Monterrosa, L Delgado Bejarano Ciencia y Agricultura 19 (3), 102-115 , 2022 2022.0 Citations: 5
Variabilidad espacial de propiedades fisicoquímicas en suelos bananeros de Urabá-Colombia J Perez-Zapata, L Delgado-Bejarano, J Osorio-Cardona, ... ACORBAT REVISTA DE TECNOLOGÍA Y CIENCIA/ACORBAT JOURNAL OF TECHNOLOGY AND … , 2024 2024.0 Citations: 3
Relationship between soil acidity and productivity of banana (Musa spp.) in Urabá, Colombia L Delgado Bejarano, DA Calle, SP Cardona, D Castañeda Sánchez, ... Chilean journal of agricultural & animal sciences 39 (2), 228-238 , 2023 2023.0 Citations: 3
Complementarity of proximal soil sensing techniques for mapping clay and chemical quality index JVF Pozzuto, LD Bejarano, H Oldoni, LR Amaral Precision agriculture'25, 453-459 , 2025 2025.0 Citations: 2
Soil erosion by hand tools for small-scale tillage on hillslopes assessed through the universal soil loss equation L Delgado-Bejarano, H González-Sánchez, D Castañeda-Sánchez Chilean journal of agricultural & animal sciences 39 (1), 75-89 , 2023 2023.0 Citations: 2
Performance of interpolation methods in digital soil mapping: the influence of data characteristics L Delgado Bejarano, A Loureiro Gonçalves Oliveira, JV Fiolo Pozzuto, ... Precision Agriculture 27 (1), 10 , 2026 2026.0 Citations: 1
Potential of interpolation methods for modelling the spatial variability of soil parameters LD Bejarano, DA Castañeda, LR Amaral Precision agriculture'25, 909-915 , 2025 2025.0 Citations: 1
Propiedades fisicoquímicas de suelos en características morfológicas del banano (Musa spp.) en cuatro fincas de Urabá-Antioquia EJ Causil-Pastrana, MAB Monterrosa, L Delgado-Bejarano, ... Temas Agrarios 29 (2), 200-210 , 2024 2024.0 Citations: 1
Relación de la productividad en fincas bananeras con el perfil de los racimos en Urabá-Antioquia MÁ Bernal, LD Bejarano, EJC Pastrana, LJA Guerra Temas agrarios 28 (2), 140-148 , 2023 2023.0 Citations: 1
Evaluación de dos técnicas de decoloración en raíces para determinación de simbiosis micorrícica en banano (Musa spp.) MÁ Bernal, LD Bejarano, SZ Henao, EJC Pastrana Temas agrarios 27 (2), 385-396 , 2022 2022.0 Citations: 1
Replication data for: Performance of interpolation methods in digital soil mapping: the influence of data characteristics LD Bejarano, LR Amaral Bejarano, Laura Delgado , 2026 2026.0
Physicochemical variation in banana soils of Urabá Colombia: comparison between two decades. MAB Monterrosa, LD Bejarano, FFF Mercado 2025.0
EFFECT OF INTERPOLATION METHODS ON THE GENERATION OF FERTILIZER PRESCRIPTION MAPS UNDER LIMITED SAMPLING SCENARIOS LD Bejarano, ALG Oliveira, H Oldoni, DC Sánchez, LR Amaral Engenharia Agrícola 45 (spe2), e20250055 , 2025 2025.0
Variación fisicoquímica en suelos bananeros de Urabá Colombia: Comparación entre dos décadas MA Bernal Monterrosa, L Delgado Bejarano, FF Fonseca Mercado 2025.0
The impact of vegetation cover on soil erosion in the drainage network of banana crop LD Bejarano, DAC Sánchez, JJP Zapata, MÁB Monterrosa, LMV Arias, ... Agronomía Colombiana 42 (3), 14 , 2024 2024.0
Evaluación de pérdida de suelos en plantaciones de banano (Musa AAA) en la zona de Urabá, Colombia LD Bejarano, JD Osorio, JJP Zapata, MÁ Bernal Acorbat Revista de Tecnología y Ciencia 1 (1) , 2024 2024.0
Modelo para la conversión de valores de pH del suelo con dos matrices de extracción en Urabá, Colombia L Delgado Bejarano, S Zapata Henao, DA Castañeda Sánchez, ... Acta Agronómica 72 (4), 324-329 , 2023 2023.0
Laura Delgado Bejarano 1✉ Email laura. bejarano@ feagri. unicamp. br Agda Loureiro Gonçalves Oliveira 1 João Vitor Fiolo Pozzuto 1 Dario Castañeda Sánchez 2 Lucas Rios LD Bejarano
Evaluación de dos técnicas de decoloración en raíces para determinación de simbiosis micorrícica en banano (Musa spp.) Evaluation of two root bleaching techniques to determine … MÁ Bernal-Monterrosa, L Delgado-Bejarano, S Zapata-Henao, ...
