Effects of nitrogen fertilizer and planting seasons on the reproductive performance of maize (Zea mays L.)

Abstract

Maize (Zea mays) serves as a crucial staple in tropical and subtropical regions; yet, productivity in these areas is suboptimal due to diminishing soil nutrient levels resulting from continuous land agriculture. This study assessed the impact of nitrogen fertiliser and planting seasons on the reproductive efficacy of maize. The study was conducted using a Randomized Complete Block Design (RCBD) with three replications. The maize seeds were sown at three per hole and subsequently thinned to two per stand at the Research Farm of the Faculty of Agriculture, Delta State University, Abraka. The experiment has five nitrogen levels (0, 40, 80, 120, and 160) and two planting seasons: early (May-August) and late (August-November), utilising Urea (46% N) as the nitrogen source. At a treatment level of 120 kg ha^-1, the maize crop exhibited the best performance during the reproductive stage compared to other treatments applied throughout the planting seasons.