Publications

Boenecke E., Lueck E., Ruehlmann J., Gruendling R., Franko U. (2018.0). Determining the within-field yield variability from seasonally changing soil conditions. Precision Agriculture, 19(4), 750-769. doi:10.1007/s11119-017-9556-z

Crop yield variations are strongly influenced by the spatial and temporal availabilities of water and nitrogen in the soil during the crop growth season. To estimate the quantities and distributions of water and nitrogen within a given soil, process-oriented soil models have often been used. These m…

Schulte-Ostermann, S., Wagner P. (2018.0). Bedarfsgerechte Grunddüngung – Düngekosten und Ertragswirkungen. Kiel, 227 – 230, : Informatik in der Land-, Forst- und Ernährungswirtschaft 38/2018.

Rühlmann, M., Büchele, D., Ostermann, M., Bald, I., Schmid, T. (2018.0). Challenges in the quantification of nutrients in soils using laser-induced breakdown spectroscopy - a case study with calcium. 146, 115-121, : .

Büchele, D., Rühlmann, M., Ostermann, M., Schmid, T. (2018.0). Entwicklung einer online-RFA Analyse zur Bestimmung von Bodennährstoffen. , : .

Adamchuk, V.A., Ji, W., Viscarra Rossel, R., Gebbers, R., Trembley, N. (2018.0). Proximal soil and plant sensing. Madison, WI, USA: American Society of Agronomy.

Soil and plant sensing can be separated into remote sensing which is discussed in Chapter 8 and proximal sens-ing, where an instrument is placed within 2 m of the target (Viscarra Rossel et al., 2011). These sensors are used for a variety of purposes including quantifying spatial and temporal change…

Heil K., Schmidhalter U. (2017.0). The Application of EM38: Determination of Soil Parameters, Selection of Soil Sampling Points and Use in Agriculture and Archaeology. Sensors, 17(11), 2540. doi:10.3390/s17112540

Fast and accurate assessment of within-field variation is essential for detecting field-wide heterogeneity and contributing to improvements in the management of agricultural lands. The goal of this paper is to provide an overview of field scale characterization by electromagnetic induction, firstly …

Dworak V., Mahns B., Selbeck J., Gebbers R., Weltzien C. (2017.0). Terahertz Spectroscopy for Proximal Soil Sensing: An Approach to Particle Size Analysis. Sensors, 17(10), 2387. doi:10.3390/s17102387

Spatially resolved soil parameters are some of the most important pieces of information for precision agriculture. These parameters, especially the particle size distribution (texture), are costly to measure by conventional laboratory methods, and thus, in situ assessment has become the focus of a n…

Heil K., Schmidhalter U. (2017.0). Improved evaluation of field experiments by accounting for inherent soil variability. European Journal of Agronomy, 89(), 1-15. doi:10.1016/j.eja.2017.05.004

Well-controlled field experiments are used to test agronomic management practices and evaluate the performance of cultivars in highly managed plots at experimental stations, in breeding nurseries or on-farm. However, the performance of crops and therefore the interpretation of experiments is affecte…

Käthner J., Ben-Gal A., Gebbers R., Peeters A., Herppich W., Zude-Sasse M. (2017.0). Evaluating Spatially Resolved Influence of Soil and Tree Water Status on Quality of European Plum Grown in Semi-humid Climate. Frontiers in Plant Science, 8(), . doi:10.3389/fpls.2017.01053

In orchards, the variations of fruit quality and its determinants are crucial for resource effective measures. In the present study, a drip-irrigated plum production (Prunus domestica L. “Tophit plus”/Wavit) located in a semi-humid climate was studied. Analysis of the apparent electrical conductivit…

Heggemann T., Welp G., Amelung W., Angst G., Franz S., Koszinski S., Schmidt K., Pätzold S. (2017.0). Proximal gamma-ray spectrometry for site-independent in situ prediction of soil texture on ten heterogeneous fields in Germany using support vector machines. Soil and Tillage Research, 168(), 99-109. doi:10.1016/j.still.2016.10.008

Gamma spectrometric field measurements may provide high resolution information on topsoil texture. Yet, calibrations for the estimation of texture data usually have to be done site-specifically. The lack of site-independent calibrations thus limits the easy and universal use of proximal gamma-ray se…