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A sensor for measuring crop biomass density has been designed and developed to meet the demands for practical use in site-specific
farming. The mechanical sensor named ‘Crop-meter’ is based on the pendulum principle. The suitability and measuring stability
of the Crop-meter has been confirmed under field conditions in different regions of Germany. Significant correlations were
obtained between Crop-meter signals and soil electrical conductivity (R
2=0.16−0.66) and grain yield (R
2=0.42−0.57). To test the suitability of the Crop-meter for site-specific management, it was used to control variable application
rates for nitrogen fertiliser, growth regulators and fungicides in real time. A small increase in yield (3.1%) as well as
reduced application rates for agrochemicals (14.6% nitrogen fertilisers; 23.1% fungicides and growth regulators) were proved
in large-scale trials. 相似文献
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