Article Sidebar
Article Details
NAJ supports free online communication and exchange of knowledge as the most effective way of ensuring that the fruits of research and development practice are made widely available. It is therefore committed to open access, which, for authors, enables the widest possible dissemination of their findings and, for readers, increases their ability to discover pertinent information. The Journal adopts and uses the CC: BY license and is open access. This license lets others distribute, remix, adapt, and build upon your work, even commercially, as long as they credit you for the original creation. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the Journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work. Copyright for articles published in this Journal is retained by the Journal.
Main Article Content
Response of Sweet Potato and Maize Intercrop to Nitrogen Levels (N) and Effect on Weed Biomass in Humid Tropical Environment of South-Eastern Nigeria
Abstract
An experiment was conducted in Western and Eastern farms of National Root Crop Research Institute Umudike in 2006 and 2007 cropping season to investigate the response of maize (zea mays.L.) and sweetpotato (Ipomoea batatas (L) Lam) to nitrogen rates and its effect on weed biomass in South Eastern Nigeria. The treatments were sole, intercrop and 4 levels of nitrogen 0, 40, 80 and 120kgN/ha laid out in a 2x4 factorial in randomised complete block design. The results showed that weed recorded higher in sole maize than sweet potato sole and intercrop. Higher yield were also obtained in sole to intercrop were 80 and 120kgN/ha gave the highest yield. The LER in the intercrop was greater than unity (LER>1) indicating yield advantage in terms of land usage. This shows that (Oba Super 2) maize could be successfully intercropped with sweet potato (TIS/0087) for optimum yield.About 80kgN/ha was therefore recommended for intercropping of both crops.
Keywords: Intercrop, Maize, Sweet potato and Weed biomass
