Comparison of grass sward dry matter yield assessment with imaging spectroscopy, disk plate meter and Cropscan

A.G.T. Schut; J.J.M.H. Ketelaars; M.M.W.B. Hendriks; J.G. Kornet; C. Lokhorst

Comparison of grass sward dry matter yield assessment with imaging spectroscopy, disk plate meter and Cropscan

In: Precision livestock farming

Authors:

A.G.T. Schut

A.G.T. Schut ¹Plant Research International, P.O. Box 16, 6700 AA, Wageningen, The Netherlands
tom.schut@wur.nl

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J.J.M.H. Ketelaars

J.J.M.H. Ketelaars ¹Plant Research International, P.O. Box 16, 6700 AA, Wageningen, The Netherlands

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M.M.W.B. Hendriks

M.M.W.B. Hendriks ¹Plant Research International, P.O. Box 16, 6700 AA, Wageningen, The Netherlands

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J.G. Kornet

J.G. Kornet ²Institute of Agricultural and Environmental Engineering P.O. Box 43, 6700 AA, Wageningen, The Netherlands

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, and

C. Lokhorst

C. Lokhorst ²Institute of Agricultural and Environmental Engineering P.O. Box 43, 6700 AA, Wageningen, The Netherlands

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Type:: Chapter

Pages:: 149–154

DOI:: https://doi.org/10.3920/9789086865154_023

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The accuracy of an imaging spectroscopy system was compared with a disk plate meter and Cropscan (NDVI and WDVI) for non-destructive assessment of grass-sward dry matter (DM) yield. Experimental data varying in sward damage and N application were used. The disk plate meter resulted in R²_adj values of 0.55-0.66 and Cropscan in R²_adj values of 0.59-0.84 for NDVI and 0.47- 0.65 for WDVI. Imaging spectroscopy calibrations resulted in R²_adj values of 0.96-0.99, prediction errors (validation) were between 235-268 kg DM ha^-1. Multiple observations may reduce errors strongly, with 27-68%. It is concluded that imaging spectroscopy performed better than the disk plate meter and Cropscan.

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Precision livestock farming

E-Book ISBN:: 9789086865154

Publisher:: Wageningen Academic

Print Publication Date:: 10 Oct 2003

Subjects
- Life Sciences
  - General
  - Animal & Veterinary

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Comparison of grass sward dry matter yield assessment with imaging spectroscopy, disk plate meter and Cropscan

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Precision livestock farming

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