Advanced Search
MyIDEAS: Login

Changes in Yield Stability: Wheat and Maize in Developing Countries

Contents:

Author Info

  • Gollin, Douglas

Abstract

This study asks whether the diffusion of modern varieties has affected the yield stability of wheat and maize production in developing countries between 1960 and 2004. The data suggest strongly that, over the past forty-plus years, there has been a striking decline in the relative variability of grain yields in wheat and (to a lesser extent) maize. The declines are strongest when measured as the standard deviation of yield divided by the mean, but there have also been declines in other measures of variability, such as the percentage deviation from trend. Declines in yield variability do not appear to be driven by increases in intensification (e.g., irrigation), nor do they appear to extend to crops, such as oilseeds, in which there has been little concerted public sector breeding effort. Instead, they appear to reflect changes in the portfolio of varieties being grown, possibly in response to breeding efforts aimed at disease and pest problems. By reducing the fluctuations in grain yields, researchers may have played a significant role in making modern crop technology attractive and accessible to farmers around the globe.

Download Info

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
File URL: http://purl.umn.edu/25239
Download Restriction: no

Bibliographic Info

Paper provided by International Association of Agricultural Economists in its series 2006 Annual Meeting, August 12-18, 2006, Queensland, Australia with number 25239.

as in new window
Length:
Date of creation: 2006
Date of revision:
Handle: RePEc:ags:iaae06:25239

Contact details of provider:
Email:
Web page: http://www.iaae-agecon.org/
More information through EDIRC

Related research

Keywords: Crop Production/Industries;

References

No references listed on IDEAS
You can help add them by filling out this form.

Citations

Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
as in new window

Cited by:
  1. Ivanic, Maros & Martin, Will, 2014. "Implications of domestic price insulation for global food price behavior," Journal of International Money and Finance, Elsevier, vol. 42(C), pages 272-288.

Lists

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

Statistics

Access and download statistics

Corrections

When requesting a correction, please mention this item's handle: RePEc:ags:iaae06:25239. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (AgEcon Search).

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.