Determination of canopy properties of winter oilseed rape using remote sensing techniques in field experiments

L. Engström; B. Lindén; M. Söderström; T. Börjesson; K. Nissen; N. Lorén; I. Gruvaeus; O. Hagner

Jump to Content

Determination of canopy properties of winter oilseed rape using remote sensing techniques in field experiments

In: Precision agriculture '09

Authors:

L. Engström

L. Engström
Search for other papers by L. Engström in
Current site
Google Scholar
PubMed

B. Lindén

B. Lindén
Search for other papers by B. Lindén in
Current site
Google Scholar
PubMed

M. Söderström

M. Söderström
Search for other papers by M. Söderström in
Current site
Google Scholar
PubMed

T. Börjesson

T. Börjesson
Search for other papers by T. Börjesson in
Current site
Google Scholar
PubMed

K. Nissen

K. Nissen
Search for other papers by K. Nissen in
Current site
Google Scholar
PubMed

N. Lorén

N. Lorén
Search for other papers by N. Lorén in
Current site
Google Scholar
PubMed

I. Gruvaeus

I. Gruvaeus
Search for other papers by I. Gruvaeus in
Current site
Google Scholar
PubMed

, and

O. Hagner

O. Hagner
Search for other papers by O. Hagner in
Current site
Google Scholar
PubMed

Type:: Chapter

Pages:: 113–118

DOI:: https://doi.org/10.1163/9789086866649_014

Purchase instant access (PDF download and unlimited online access):

€42.00€35.00 excl. VAT

Add to Cart

Redeem Access Token

Abstract

Measuring canopy reflectance in winter oilseed rape has proved to be a fast and non-destructive tool for monitoring canopy properties in precision agriculture. In two-year field experiments of oilseed rape from 2007 to 2009, in south-western Sweden, investigations were carried out in order to evaluate the use of the handheld Yara N-Sensor for determination of biomass and N-content instead of N-analysis of crop samples in the laboratory. The use of digital photography to determine plant density was also investigated with the purpose to replace time consuming counts of plants by hand in these field experiments. The experiment was performed in 40 sampling areas of 12 × 15 m distributed on four different fields with varying plant density. N-sensor measurements and digital photos were obtained in late autumn, early spring simultaneously with counts of plants and measurements of DM and N-content in crop samples from 2 m² within each sampling area. The N-content of the crop in late autumn in 2007 (17 October) was 18 kg N/ha, on average, and ranged from 3 to 81 kg N/ha (sd.= l 5). The r² values for the relationship (fitted power function) between sensor values and biomass in kg DM/ha and N-content (kg N/ha) were 0.93 and 0.92, respectively. Using image analysis, fewer plants were detected than with manual counting. This was accentuated when the plant density increased. The area fraction covered by crop estimated using image analysis of the ground photographs correlated well (r²=0.94) with the dry matter of the manually cut crop samples. Since biomass and N-content also had a good correlation image analysing may be a method to determine the N-content. The results indicated that the handheld N-sensor could be a fast and less costly method to determine the DM- and N-content of winter oilseed rape.

Citation Info

Save
Cite
Email this content

Share link with colleague or librarian

You can email a link to this page to a colleague or librarian:
Email this content
or copy the link directly:

https://brill.edhh.ma/abstract/book/9789086866649/B9789086866649_s014.xml
The link was not copied. Your current browser may not support copying via this button.

Link copied successfully

Collapse
Expand

Precision agriculture '09

E-Book ISBN:: 9789086866649

Publisher:: Wageningen Academic

Print Publication Date:: 01 Jan 2009

Subjects
- Life Sciences
  - General
  - Agriculture & Environment

Front Matter

Show Items

Back Matter

Show Items

Metrics

	All Time	Past 365 days	Past 30 Days
Abstract Views	42	27	10
Full Text Views	0	0	0
PDF Views & Downloads	0	0	0

African Studies	Education	Media Studies
American Studies	History	Middle East and Islamic Studies
Ancient Near East and Egypt	Human Rights and Humanitarian Law	Musicology
Art History	International Law	Philosophy
Asian Studies	International Relations	Religious Studies
Biblical Studies	Jewish Studies	Slavic and Eurasian Studies
Biology	Languages and Linguistics	Social Sciences
Book History and Cartography	Life Sciences	Theology and World Christianity
Classical Studies	Literature and Cultural Studies

Subjects

Authors

Open Access

Product Information

Company

Contact

Determination of canopy properties of winter oilseed rape using remote sensing techniques in field experiments

Abstract

Citation Info

Share link with colleague or librarian

Precision agriculture '09

Table of Contents

Metrics

Metrics