Evaluation of current and model-based site-specific nitrogen applications on wheat (Triticumaestivum L.) yield and environmental quality

Evaluation of current and model-based site-specific nitrogen applications on wheat... Crop growth models have been used in the past to study causes of yield variability and to estimate the economic consequences of variable nitrogen rate prescriptions. In this study, the APOLLO model, which is based on the DSSAT crop growth model family, was implemented to develop optimum site-specific nitrogen management prescriptions for wheat. The nitrogen prescription was targeted to maximize the long-term marginal net return, which includes an economic penalty for leaving excess nitrogen in the root zone at harvest. By using two constraints—yield and environmental quality—it is expected that the simulation can find prescriptions that maximize marginal net return while reducing the amount of nitrogen losses to surface and groundwater sources at the sub-field scale. Overall, the total amount of nitrogen applied in the control and the model-based treatment was about the same. Thus, for yield, environmental aspects and economic aspects no significant differences were identified between both treatments. However, the results indicated that the model-based nitrogen prescription considered the yield variability adequately for most grids, given by an increase in nitrogen use efficiency, and thus enabled the design of nitrogen prescriptions adapted to the nitrogen demand of the plants. The model-based nitrogen strategy helps to optimize the nitrogen application rate within the field over the long-term of about 30 years. To gain further advantages from model-based nitrogen prescriptions, it seems to be useful to additionally update the model with actual information derived for the current growing conditions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Precision Agriculture Springer Journals

Evaluation of current and model-based site-specific nitrogen applications on wheat (Triticumaestivum L.) yield and environmental quality

Loading next page...
Springer US
Copyright © 2008 by Springer Science+Business Media, LLC
Life Sciences; Agriculture; Soil Science & Conservation; Remote Sensing/Photogrammetry; Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences; Atmospheric Sciences
Publisher site
See Article on Publisher Site


  • Managing uncertainty in site-specific management: What is the best model?
    Adams, ML; Cook, S; Corner, R
  • Spatial validation of crop models for precision agriculture
    Basso, B; Ritchie, JT; Pierce, FJ; Braga, RP; Jones, JW

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 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

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

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial