Urea and Ammonium Nitrate as Nitrogen Sources for Southern Pine Plantations
Urea and ammonium nitrate, applied in February, June, and October, were compared as nitrogen fertilizer sources in 11 southern pine plantations ranging in age from 6 to 18 years old. Over a 4-year assessment period all but one of the plantations responded significantly to nitrogen fertilization. Differences between urea and ammonium nitrate were nonsignificant at all sites for all three dates of application. Average responses for February and October applications were quantitatively very similar at each site. However, at 3 of the 11 sites June applications of both urea and ammonium nitrate gave significantly poorer responses than February and October applications.
No Supplementary Data
No Article Media
Document Type: Journal Article
Affiliations: Manager, Forest Management Research, Weyerhaeuser Company, Centralia, Washington
Publication date: 1981-08-01
More about this publication?
- Important Notice: SAF's journals are now published through partnership with the Oxford University Press. Access to archived material will be available here on the Ingenta website until March 31, 2018. For new material, please access the journals via OUP's website. Note that access via Ingenta will be permanently discontinued after March 31, 2018. Members requiring support to access SAF's journals via OUP's site should contact SAF's membership department for assistance.
Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
- Membership Information
- Ingenta Connect is not responsible for the content or availability of external websites