Effects of various planting ratios on the performance of maize and cowpea in mixtures
The experiment was conducted at the Teaching and Research Farm of Ambrose Alli University, Ekpoma to evaluate the performance of maize and cowpea planted at various replacement ratios. Weight of grains per plant and grain yield were higher in cowpea in maize-cowpea intercrop planted in ratio 2:1. Based on the total yield and land equivalent ratio (LER) values, the optimum yield ratio was in maize+cowpea planted in ratio 2:1. The planting ratio 1:1 of maize-cowpea intercrop was found to increase the number of root nodules of cowpea at 6 WAP; this also brought corresponding increase in weight of root nodules per plant at 6 WAP. Potassium was higher in the ear leaf of sole maize than in the mixtures and phosphorus was higher in mixture of maize and cowpea planted in ratio 1:1. Maize grain from maize-cowpea intercrop at 1:2 had the highest concentration of N and P. Maize grains from maize-cowpea ratio 1:1 had the highest concentration of Mg, while the highest maize yield was recorded in maize+cowpea intercrop planted in ratio 1:2.
Keywords: Evaluation, ratio, yield, maize and cowpea
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.