Searching for the cause of variability

J.N. Jukema; K.H. Wijnholds; W. van den Berg

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Searching for the cause of variability

in Precision agriculture '09

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J.N. Jukema

J.N. Jukema
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K.H. Wijnholds

K.H. Wijnholds
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W. van den Berg

W. van den Berg
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Art:: Kapitel

Seiten:: 469–476

DOI:: https://doi.org/10.1163/9789086866649_057

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Abstract

For many years research has been done for the use of remote sensing to establish optimum nitrogen application rates. Good relations have been found between the need of nitrogen and various calculated indices. This information can be used to save nitrogen, increase yield and improve the homogeneity of the harvested crops. Although good relations between the need of nitrogen and various calculated indices have been found, not all the variation of the crop growth within the field is caused by nitrogen. Within the project ‘Perceel Centraal’ research has been performed to the causes of variability, charted by aerial imaging, within the field. The project is located in and around Valthermond, the Netherlands on sandy- and peaty soils. The variation not only is induced by nitrogen, but also can be attributed to e.g. drought stress, soil structure, nematodes, organic matter and mineral content of the soil. Although it is clear that nitrogen was not the only reason causing the variation within the field it is one of the main reasons and it can help to reduce variability based on e.g. organic matter (OM) content. To make the right decisions the biomass maps should be interpreted first and then a decision should be made how to handle the field. It turned out to be very difficult and time taking for farmers to find out what the reason is of the variability within their fields. To get the maximum value out of the Vegetation Index (VI) maps the project ‘Perceel Centraal’ developed a checklist for cereals, potatoes and sugar beets with which the cause of the infield variation can be found easily. After using the checklist the right choices can be made concerning the optimization of the farmer’s fields.

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Precision agriculture '09

ISBN:: 9789086866649

Verleger:: Wageningen Academic

Print-Publikationsdatum:: 01 Jan 2009

Fachgebiete
- Biowissenschaften
  - Allgemein
  - Landwirtschaft und Umwelt

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Searching for the cause of variability

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Precision agriculture '09

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