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- Martin Bachmaier
- Precision Agriculture
- 2006

AbstractThe yield map is generated by fitting the yield surface shape of yield monitor data mainly using paraboloid cones on floating neighborhoods. Each yield map value is determined by the fit of… (More)

- Martin Bachmaier, Matthias Backes
- Precision Agriculture
- 2008

The Zðx ~Þ and Zðx ~þ h ~Þ denote random variables. According to the intrinsic hypothesis, cðh ~Þ is assumed to depend only on the separation vector, the lag h ~; but not on the location x ~:… (More)

- Martin Bachmaier, Markus Gandorfer
- Precision Agriculture
- 2008

In this study we derive a test that aims to show that the economic optimum nitrogen applications in site-specific management zones are different. In addition, a confidence interval is derived for the… (More)

- Martin Bachmaier
- 2009

An exact confidence set for that x-coordinate where a quadratic regression model has a given gradient is derived. The limits of the confidence set are given by mathematical formulae. They are… (More)

There is a confusing situation in geostatistical literature: Some authors write variogram, and some authors write semivariogram. Based on a formula for the empirical variance that relates to pairwise… (More)

- Martin Bachmaier
- 2012

Nitrogen rate trials are often performed to determine the economically optimum N application rate. For this purpose, the yield is modeled as a function of the N application. The regression analysis… (More)

Nitrogen rate trials are often performed to determine the economically optimum N application rate. For this purpose, the yield is modeled as a function of the N application. The regression analysis… (More)

- Martin Bachmaier
- 2013

The objective of this article is to address the frequently found academic opinion that in order to calculate the population variance, the sum of the squared deviations from the mean should be divided… (More)

- Martin Bachmaier
- 2010

Every value of the yield map is determined by robust fitting of a paraboloid surface over a spatial neighborhood of yield monitor data around the point to be mapped, so that the influence of outliers… (More)