Cookies must be enabled to use this web application.

To allow this site to use cookies, use the steps that apply to your browser below. If your browser is not listed below, or if you have any questions regarding this site, please contact us.

Microsoft Internet Explorer
  • 1. Select "Internet Options" from the Tools menu.
  • 2. Click on the "Privacy" tab.
  • 3. Click the "Default" button.
  • 4. Click "OK" to save changes.
Chrome Chrome
  • 1. Click the "Spanner" icon in the top right of the browser.
  • 2. Click Options and change to the "Under the Hood" tab.
  • 3. Scroll down until you see "Cookie settings:".
  • 4. Set this to "Allow all cookies".
Firefox Firefox
  • 1. Go to the "Tools" menu and select "Options".
  • 2. Click the "Privacy" icon on the top of the window.
  • 3. Click on the "Cookies" tab.
  • 4. Check the box corresponding to "Allow sites to set Cookies.
  • 5. Click "OK" to save changes.
Opera Opera
  • 1. Click on the "Tools" menu and then click Preferences.
  • 2. Change to the Advanced tab, and to the cookie section.
  • 3. Select "Accept cookies only from the site I visit" or "Accept cookies".
  • 4. Ensure "Delete new cookies when exiting Opera" is not ticked.
  • 5. Click OK.
Netscape and Mozilla Suite Netscape and Mozilla Suite
  • 1. Select "Preferences" from the Edit menu.
  • 2. Click on the arrow next to "Privacy & Security".
  • 3. Under "Privacy & Security" select "Cookies".
  • 4. Select "Enable all cookies".
  • 5. Click "OK" to save changes.
Safari Safari
  • 1. Click on the "Cog" icon in Safari.
  • 2. Click Preferences.
  • 3. Change to the Security tab.
  • 4. Select "Only from sites I visit" or "Allow".
  • 5. Close the dialog using the cross.
Book Image Not Available Book Image Not Available

See inside

Book details
  • Genre:SCIENCE
  • SubGenre:Life Sciences / Botany
  • Language:English
  • Pages:100
  • Format:Paperback
  • Paperback ISBN:9781543982220

Competition Between Yellow Nutsedge(Cyperus esculentus L) & Maize (Zea mays)

by Abraham Gemechu

Book Image Not Available Book Image Not Available

See inside

Overview

This book contains details of a research work conducted at the University of Goettingen in Germany as part of a post graduate paper work to study the effect of competition of a weed plant yellow nutsedge (Cyperus esculentus L) on the dry matter yield of maize (Zea mays L) crop. The result of the experiment was analyzed and discussed against previous findings. Moreover, the biology and the economic importance of the weed was mentioned in this book.

Description

This book covers an extensive knowledge of the author with regard to the competitive interaction of crop plants and a perennial noxious weed of the world. The author served as crop protection expert for many years in Ethiopia before he gets admitted for post graduate study at the Institute of Tropical and Subtropical Agriculture under the University of Goetingen in Germany. The results of an extensive research work at the institute were documented to demonstrate the presence of competition between yellow nutsedge (Cyperus esculentus L) and maize (Zea mays L) plant. So far, all loss of yield by yellow nutsedge was conducted using a herbicide and other means of control when the weed is growing naturally with crop plants. However, in this research the amount of yield loss to maize plant because of competition with the weed was determined without using herbicide and by maintaining different population of the weed to grow with a constant number of crop plant in a controlled environment. The study covers not only the loss of yield because of the weed but also the factors of competition such as nitrogen use efficiency and water use efficiency. The flow of nitrogen fertilizer both in the plant and in the soil was traced using the N-15 isotope. This experiment was very expensive had it been not financed by University of Goetingen and the Germen Academic Exchange of Germany (DAAD). The author wants  to share his experience in conducting this experiment and its results to those academic institutions, farmers, and research institutes who are interested in the subject as there was no duplicate work previously conducted on the subject.

About the author

The author used to be a post graduate student at the University of Goettingen in Germany when the research was conducted. At present, he is living in United States working as agriculture specialist under United States Custom and Border Protection previously called USDA Animal and Plant Health Inspection Service. He has many years of experience in plant protection, plant quarantine, pest identification and research. His advisors Professor Paul P.L.G Vlek and Professor Baerbel Gerowitt were a lecturer and a scientist at University of Goetingen during his time of study.

Thanks for submitting a review!

Your review will need to be approved by the author before being posted.

See Inside
Front Cover

Loading book cover...

Book Image Not Available Book Image Not Available
Session Expiration WarningYour session is due to expire.

Your online session is due to expire shortly.
Would you like to extend your session and remain logged in?

Session Expired

Your session has expired.We're sorry, but your online session has expired.
Please log back into your account to continue.

This site uses cookies. Continuing to use this site without changing your cookie settings means that you consent to those cookies to enhance site navigation and the overall user experience. Learn more about our privacy policy or learn more about how to turn off cookies.