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
Growthand yield response of groundnut (<i>Arachis hypogaea</i> l.) to plant densities and phosphorus on an ultisol in southeastern Nigeria
Abstract
An experiment on the optimum planting density and Phosphorus requirement of a local Groundnut (Arachis hypogaea L.) cultivar, 'Graffi' was carried out at the Crop Science Research Farm of the University of Calabar in the humid area of southeastern Nigeria, during the growing seasons of 2007 and 2008. Five Phosphorous rates 90, 20, 30, 40 and 50 kg k O /ha) were applied to five plant densities of Groundnut (47619, 57128, 71428, 95238 and 142857 plants/ha) laid out in a RCB design in three replications. Parameters assessed were plant height, branches plant, dry biomass yield/ha, filled pods/plant and seed yield/ha. Results showed significant (P=0.05) effect of planting density on plant height, while phosphorus rates influenced the number of filled pods/plant and seed yield/ha. Tallest plants with mean height of 53.2 cm were in plots containing 142,853 plants/ha, while the highest mean number of 15.2 filled pods/plant and correspondingly highest mean seed yield of 1078.3 kg/ha were obtained by applying 40 kg P O /ha to 95,238 plants/ha. It was concluded that planting the crop at 95,238 plants/ha with application of 40kg P 0 /ha would enhance optimum productivity of groundnut in the humid areas of southeastern Nigeria.
Keywords: Groundnut density, humid areas, phosphorous ultisol, yield.
