Featured Research

from universities, journals, and other organizations

Corn Yield Stability Varies With Rotations, Fertility

Date:
July 23, 2009
Source:
American Society of Agronomy
Summary:
A recent study investigated the effects of long-term cropping systems on corn grain yields, yield trends, and yield stability over the last 16 years of a long-term fertility and cropping systems experiment. This study suggests that on average in a productive Central Pennsylvania soil, the yield of corn rotated with alfalfa, red clover and timothy is modestly higher and less variable than corn grown exclusively.

Understanding temporal variability in crop yields has implications for sustainable crop production, particularly since greater fluxes in crop yields are projected with global climate change.

Many long-term cropping system studies have compared average crop yields; this study looked at stability of yields and whether cropping systems and manure applications affected crop yields differently in poor- and high- yielding years.

K.K. Grover et al. investigated the effects of long-term cropping systems on corn grain yields, yield trends, and yield stability over the last 16 years of a long-term fertility and cropping systems experiment at the Pennsylvania State University.

This study suggests that on average in a productive Central Pennsylvania soil, the yield of corn rotated with alfalfa, red clover, and timothy is modestly higher and less variable than corn grown exclusively. Further, when dairy manure is applied to meet crop nitrogen requirements, continuous corn can perform equally well to the rotated in high-yielding years, but performs poorly in low-yielding years such as dry summers and wet springs.

When synthetic fertilizers or phosphorus-based manure are applied, however, continuous corn may yield less than rotated corn in low- and high-yielding years. Further research is needed to evaluate the economic returns of these cropping systems.

The research was funded by the Department of Crop and Soil Sciences, Pennsylvania State University, University Park, PA.


Story Source:

The above story is based on materials provided by American Society of Agronomy. Note: Materials may be edited for content and length.


Journal Reference:

  1. K. K. Grovera, H. D. Karstenb and G. W. Rothb. Corn Grain Yields and Yield Stability in Four Long-Term Cropping Systems. Agron J, 101:940-946 (2009 DOI: 10.2134/agronj2008.0221x

Cite This Page:

American Society of Agronomy. "Corn Yield Stability Varies With Rotations, Fertility." ScienceDaily. ScienceDaily, 23 July 2009. <www.sciencedaily.com/releases/2009/07/090721113307.htm>.
American Society of Agronomy. (2009, July 23). Corn Yield Stability Varies With Rotations, Fertility. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2009/07/090721113307.htm
American Society of Agronomy. "Corn Yield Stability Varies With Rotations, Fertility." ScienceDaily. www.sciencedaily.com/releases/2009/07/090721113307.htm (accessed October 21, 2014).

Share This



More Plants & Animals News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

White Lion Cubs Born in Belgrade Zoo

White Lion Cubs Born in Belgrade Zoo

AFP (Oct. 20, 2014) Two white lion cubs, an extremely rare subspecies of the African lion, were recently born at Belgrade Zoo. They are being bottle fed by zoo keepers after they were rejected by their mother after birth. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
Goliath Spider Will Give You Nightmares

Goliath Spider Will Give You Nightmares

Buzz60 (Oct. 20, 2014) An entomologist stumbled upon a South American Goliath Birdeater. With a name like that, you know it's a terrifying creepy crawler. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com
Adorable Video of Baby Rhino and Lamb Friend Playing

Adorable Video of Baby Rhino and Lamb Friend Playing

Buzz60 (Oct. 20, 2014) Gertjie the Rhino and Lammie the Lamb are teaching the world about animal conservation and friendship. TC Newman (@PurpleTCNewman) has the adorable video! Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins