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espanolEl objetivo de este estudio fue caracterizar la variabilidad espacial del pH para suelos de dos fincas en el estado de Parana, Brasil, con base en dos metodos diferentes de muestreo utilizados en agricultura de precision, mediante analisis geoestaddisticos. El primero metodo de muestreo del pH consistio en la colecta de muestras de suelo por ele metodo tradicional (1punto/ha). El segundo metodo de determinacion del pH fue el sensor de suelo dinâmico (200 puntos / ha). El modelo esferico fue mas adecuado para la mayoria de los semivariogramas, independientemente del metodo de muestreo. La mejor distribucion espacial fue obtenida por la cualidad del muestreado del sensor de suelo dinâmico. El numero de muestras del pH colectadas y el metodo de muestreo influyeron en la representacion visual de la variabilidad del pH EnglishThis study aimed to characterize the spatial variability of pH in soils of two farms in the state of Parana, Brazil, based on two different sampling methods used in precision agriculture, by means of geostatistical analyzes. The first method of sampling the pH grid consisted in the collection of soil samples by the traditional method (1 point / ha). The second method of pH determination was by on-the-go soil sensor (200 points / ha). The spherical model was better suited to most semivariograms, regardless of the sampling method. After adjusting the semivariograms for soil pH determination methods, thematic maps were made using normal kriging. The best spatial distribution of pH was obtained where the attribute was sampled by the on-the-go sensor. The number of pH samples collected and the sampling method influenced the visual representation of pH variability

Spatial variability of soil pH sampled by two methodologies used in precision agriculture in farms under crop rotation