EFFECT OF RABBIT MANURE AND ROW ARRANGEMENT ON CROP YIELD UNDER FINGER MILLET AND GROUNDNUT INTERCROPPING SYSTEMS IN A SEMI-ARID NIGERIA

Abstract

Field trials were conducted at the Research and Training farm of the Centre for Dryland Agriculture, Bayero University Kano (Latitude 11^º 58' N and Longitude 8^º26' E and 475 m above sea level) and at community-based demonstration farm, Dawakin Kudu (Latitude 11^º 84 N and Longitude 8^º 59” E) Kano State, Nigeria during the 2019 rainy season, to investigate the effects of rabbit manure (RM) and row arrangement (RA) on finger millet and groundnut intercropping system. The treatments consisted of six row arrangements (1:1, 1:2, 2:1, 2:2, 2:4, and alternate stand) and four levels of rabbit manure (0, 1.5, 2.5, and 3.5 t ha^-1) and one level of NPK fertilizer. The treatments were laid out in a split-plot design, with row arrangement (RA) occupying the main plot and rabbit manure (RM) occupying the sub plot, which were replicated three times. Findings revealed that Rabbit manure application significantly (P < 0.05) affected most finger millet and groundnut yield parameters, except for row arrangement which had minimal impact. The optimal rate of rabbit manure application depended on the specific parameter, location, and crop. For finger millet, application of RM increased spike weight, panicle weight, 1000-grain weight, and total grain yield at Dawakin Kudu but only affected spike weight at BUK. For groundnut, RM application increased the number of pods per plant, mean pod weight, and 100-kernel weight at Dawakin Kudu, while only affecting the number of pods per plant at BUK. Intercropping was generally more productive than sole cropping, with the most productive combinations varying by location. Therefore, it could be recommended for farmers in the Sudan savanna to consider the possible adoption of the application of rabbit manure at a rate of 2.5–3.5 t ha^-1 to increase finger millet and groundnut yields.