Within-field Variations in Grain Protein Content—Relationships to Yield and Soil Nitrogen and Consistency in Maps Between Years

Within-field Variations in Grain Protein Content—Relationships to Yield and Soil Nitrogen and... In uniformly managed fields, high yielding areas and areas with less plant-available soil nitrogen (Np) may have lower grain crude protein concentration (CP) due to smaller amounts of nitrogen available per kg grain yield. With site-specific fertilization, more nitrogen could be applied to such areas to achieve a better and more even CP within the field. To investigate the need for this and the possibility of estimating fertilizer demand from historical data, within-field variations in CP, correlations with yield and Np and their consistency in spatial distribution between years were investigated. Measurements were performed during 1998–2000 at 34 sites within a 15-ha field in southwestern Sweden. Winter wheat (Triticum aestivum) was grown in 1998 and 2000 and spring barley (Hordeum vulgare) in 1999. CP was dependent on both yield and Np, but was also affected by other factors. The spatial distributions of CP and grain yields within the field were not consistent between years, probably because fertilization relative to optimum varied differently between sites in different years. In 1998, CP and grain yield were negatively correlated and CP was larger at sites with more Np. CP had a positive correlation with both yield and Np in 1999. In 2000, CP was lower where yield was higher at most sites, but did not correlate significantly with either yield or Np. The positive correlation between yield and CP was connected with nitrogen fertilization below optimum, whereas the negative correlation was connected with nitrogen fertilization near or above optimum at most sites. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Precision Agriculture Springer Journals

Within-field Variations in Grain Protein Content—Relationships to Yield and Soil Nitrogen and Consistency in Maps Between Years

Loading next page...
 
/lp/springer_journal/within-field-variations-in-grain-protein-content-relationships-to-rO5SLu2zM9
Publisher
Springer Journals
Copyright
Copyright © 2004 by Kluwer Academic Publishers
Subject
Life Sciences; Agriculture; Soil Science & Conservation; Remote Sensing/Photogrammetry; Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences; Atmospheric Sciences
ISSN
1385-2256
eISSN
1573-1618
D.O.I.
10.1007/s11119-004-6343-4
Publisher site
See Article on Publisher Site

Abstract

In uniformly managed fields, high yielding areas and areas with less plant-available soil nitrogen (Np) may have lower grain crude protein concentration (CP) due to smaller amounts of nitrogen available per kg grain yield. With site-specific fertilization, more nitrogen could be applied to such areas to achieve a better and more even CP within the field. To investigate the need for this and the possibility of estimating fertilizer demand from historical data, within-field variations in CP, correlations with yield and Np and their consistency in spatial distribution between years were investigated. Measurements were performed during 1998–2000 at 34 sites within a 15-ha field in southwestern Sweden. Winter wheat (Triticum aestivum) was grown in 1998 and 2000 and spring barley (Hordeum vulgare) in 1999. CP was dependent on both yield and Np, but was also affected by other factors. The spatial distributions of CP and grain yields within the field were not consistent between years, probably because fertilization relative to optimum varied differently between sites in different years. In 1998, CP and grain yield were negatively correlated and CP was larger at sites with more Np. CP had a positive correlation with both yield and Np in 1999. In 2000, CP was lower where yield was higher at most sites, but did not correlate significantly with either yield or Np. The positive correlation between yield and CP was connected with nitrogen fertilization below optimum, whereas the negative correlation was connected with nitrogen fertilization near or above optimum at most sites.

Journal

Precision AgricultureSpringer Journals

Published: Jun 16, 2004

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off