soil ph mapping with an on-the-go sensor土壤ph值映射与一个活跃的传感器.pdfVIP

Sensors 2011, 11, 573-598; doi:10.3390/s110100573 OPEN ACCESS sensors ISSN 1424-8220 /journal/sensors Article Soil pH Mapping with an On-The-Go Sensor Michael Schirrmann 1,*, Robin Gebbers 1, Eckart Kramer 2 and Jan Seidel 3 1 Leibniz-Institute for Agricultural Engineering, Department of Engineering for Crop Production, Max-Eyth-Allee 100, D-14469 Potsdam, Germany; E-Mail: rgebbers@atb-potsdam.de 2 HNEE School for Sustainable Development Eberswalde, Friedrich-Ebert-Str. 28, D-16225 Eberswalde, Germany; E-Mail: Eckart.Kramer@hnee.de 3 Technical University of Dresden, D-01062 Dresden, Germany; E-Mail: seidel_j@gmx.de * Author to whom correspondence should be addressed; E-Mail: mschirrmann@atb-potsdam.de; Tel.: +49-331-5699-412; Fax: +49-331-5699-849. Received: 11 November 2010; in revised form: 23 December 2010 / Accepted: 29 December 2010 / Published: 7 January 2011 Abstract: Soil pH is a key parameter for crop productivity, therefore, its spatial variation should be adequately addressed to improve precision management decisions. Recently, the Veris pH ManagerTM, a sensor for high-resolution mapping of soil pH at the field scale, has been made commercially available in the US. While driving over the field, soil pH is measured on-the-go directly within the soil by ion selective antimony electrodes. The aim of this study was to evaluate the Veris pH ManagerTM under farming conditions in Germany. Sensor readings were compared with data obtained by standard prot