Prediction accuracy of selected spatial interpolation methods for soil texture at farm field scale

Gozdowski, Dariusz; Stępień, Michał; Samborski, Stanisław; Dobers, Eike Stefan; Szatyłowicz, Jan; Chormański, Jarosław

doi:10.4067/s0718-95162015005000033

Cited by 20 publications

(13 citation statements)

References 23 publications

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“…Estudio climatológico de los vientos para la ciudad de Bogotá en el periodo 2010 -2016 datos de la velocidad media del viento y la predominancia de la dirección para la construcción de un mapa con áreas de igual intensidad del viento (Gozdowski et al, 2015), y una representación vectorial de su dirección, permitiendo así identificar parámetros de flujo del viento en la ciudad de Bogotá, su posible relación con la orografía y la densidad urbana, así como comparar la información resultante de este mapa con lo determinado en los estudios de calidad del aire para el material particulado y el régimen de vientos en la ciudad.…”

Section: Descripción Vectorial De Los Datosunclassified

Estudio climatológico de los vientos para la ciudad de Bogotá en el periodo 2010 – 2016

2019

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En Colombia, hay una carencia en los estudios climatológicos del viento, ya que, los que existen actualmente no aplican técnicas estadísticas ni periodos representativos adecuados. Por consiguiente, el presente estudio analiza el comportamiento climatológico del viento en la ciudad de Bogotá, para el periodo 2010 a 2016, buscando describir estadística, espacial y vectorialmente esta variable climatológica. Para empezar, se realizó un análisis estadístico del conjunto de datos, de la velocidad del viento, mediante el software Windographer©, utilizando las técnicas exploratorias para la distribución Weibull, describiendo así los parámetros estadísticos de las estaciones en las principales zonas de la ciudad. Del mismo modo, se elaboraron las rosas de los vientos por estación, con el software WRPLOT™; y, para finalizar, se realizó un mapa vectorial mediante el método de interpolación Co-Kriging, utilizando el sistema de información geográfica ArcGis®. Observando que el régimen de circulación atmosférico en Bogotá está estrechamente relacionado con la presencia de los cerros orientales y con la predominancia de los vientos alisios; así mismo, se encontró que la mayor velocidad del viento se presenta al suroeste, y las magnitudes más débiles, al norte y en cercanía a los cerros orientales.

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Section: Descripción Vectorial De Los Datosunclassified

Estudio climatológico de los vientos para la ciudad de Bogotá en el periodo 2010 – 2016

2019

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“…Field data was spatialized using kigring (Gozdowski et al, 2015). We tested the predictive skill of pedo tranfer functions when used as an auxiliary method to increase the data density.…”

Section: Methods For Defining Homogeneous Soil Areasmentioning

confidence: 99%

Assessment of methods to determine soil characteristics for management and design of irrigation systems

Valdivia-Cea¹,

Holzapfel²,

Rivera³

et al. 2017

J. Soil Sci. Plant Nutr.

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Irrigation system design and irrigation management require appropriate match of the soil and type of crop. In Chile, agrological reports are currently being used to determine the homogeneity of soil units and land capability classes: fruit tree production vs orchard design. Agrological studies use a number of soil characteristics, but these do not include hydrophysical properties, which are essential when zoning for irrigation. Therefore, it is necessary to establish a methodology to objectively evaluate soils, based on a quantitative analysis that includes hydrophysical parameters. In this study, different methodologies are proposed for classifying homogenous soil units based on extensive field sampling. The field data was evaluated using two methodologies: 1) the SAG-USDA Manual and 2) in situ sampling of soil's hydrophysical properties and pedotransfer models. There were differences between the methodologies regarding zoning soil properties for irrigation system design and management. The methodology based on the SAG-USDA Manual requires auxiliary data in order to provide useful maps for design and management of irrigation systems. Published pedotransfer functions should be carefully assess before their use in large-scale design, as the quality the estimations depends on the data used to derive the equations. Therefore, if field data is available, we recommend calibrating equations using well-known statistical methods such as least square. In this study, the functions obtained describe the properties of interest properly, such as the field capacity for design of micro-irrigation systems. However, predicting wilting point did not give reliable results.

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“…Dobermann et al [7] processed raw data through a cleaning algorithm that deleted the following erroneous values: header status up, start and end pass delays (8 s) for both headlands and stop-and-go segments within the field, short segments (<12 data points), frequency distribution outliers (values outside the mean ± 3 SD), co-located yield records caused by global positioning system (GPS) drift, and local neighbourhood outliers. According to Gozdowski et al [9], data cleaning of outliers is usually a method allowing the identification of erroneous observations for the whole set of data at once. Most often, the method based on the distribution presented as histogram is used.…”

Section: Introductionmentioning

confidence: 99%

The application of various software programs for mapping yields in precision agriculture

Zagórda

Walczykova

2018

BIO Web Conf.

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Yields mapping can be done in GIS programs as well as in specialized software for agriculture. These can be programs designed for preparing informative and application maps and also software designed for integrated management of agricultural production that have a built-in GIS module. In the presented study, representatives of those three groups were taken into consideration – QGIS, Agro-Map, and FarmTMWorks Office (now Trimble Ag Software). The aim of the study was to evaluate the compatibility of the obtained yield maps in terms of basic statistical and geostatistical parameters, such as the average yield, the coefficient of variability, placement on the field zones with different yield ranges, and their percentage share in the area of the field surface. Calculations and visualization of the results were done for winter wheat, winter rape, and corn, cultivated in three-year rotation on one field. All three presented programs allow preparation of raw yield monitoring data so that yield maps produced with identical assumptions of interpolation parameters differ slightly. The difference in the use of these applications is mainly due to the further use of the resulting maps, the time required to learn the program, the task execution time, and the cost of purchase.

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Prediction accuracy of selected spatial interpolation methods for soil texture at farm field scale

Cited by 20 publications

References 23 publications

Estudio climatológico de los vientos para la ciudad de Bogotá en el periodo 2010 – 2016

Estudio climatológico de los vientos para la ciudad de Bogotá en el periodo 2010 – 2016

Assessment of methods to determine soil characteristics for management and design of irrigation systems

The application of various software programs for mapping yields in precision agriculture

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