9 pages, This study examines the labour of small-scale farmers during ploughing and develops a power tiller with the view of reducing the hardness of work and increasing the field operation capacity. The machine is designed and fabricated based on standard engineering principles for part-sizing and selection of materials. It is tested and the performance results obtained are compared to manual ploughing. Performance parameters were determined from fieldwork and laboratory experiments. The average depth, width of cut and operation speed were 14.84 cm, 24.56 cm and 3.48 km/h, respectively for power tiller compared with 10.62 cm, 18.97 cm and 0.49 km/h, respectively for manual ploughing. Average field efficiency and theoretical field capacity were 88.23%, and 0.096 ha/h, respectively for the power tiller compared with 96%, and 0.0136 ha/h for manual ploughing. Fuel consumption revealed for power tiller is 1.99 l/h. The field capacity of the machine was 0.075 ha/h which was higher than 0.013 ha/h for manual ploughing. The results show that the machine is suitable for small-scale farmers. Economic assessment of the power tiller is work to be done.
8 pages, This perspective paper reviews the existing research directions on agricultural extension programmes in Nigeria and highlights how they are incapable of diffusing enough knowledge to facilitate the adoption of 21st-century agricultural innovations and enhance sustainable practices among rural farmers. A key idea of this paper is to suggest a new direction of research that is oriented towards the quality, skills, and strategies of effective and efficient communication that the extension agents possess, and a two-way communication delivery, and accentuate how it is a panacea for effective diffusion of knowledge and adoption of agricultural innovations among rural farmers. The methodology was to review and compare bodies of literature from countries with the best agricultural extension and rural advisory services, particularly some countries in Asia, and show how insights from those countries can inform a new research direction in effectively communicating agricultural innovations to Nigerian rural farmers. Drawing on experiences from those countries, it was confirmed that Nigeria's extension system is not effective and efficient in communicating innovations in global agricultural practices to farmers in the rural areas, and research efforts in extension services in the country are still fixated on the role of extension agents as teachers to farmer-pupils and one-way communication delivery from research through extension to farmers, and the availability and ability to use communication channels. Based on the current challenges in farming and agriculture at large, there is a need to rethink the concept of extension in Nigeria, emphasize training of agents, acquisition of communication skills and adoption of a two-way communication delivery that recognises farmers as autonomous agents and co-designers of agricultural innovations and not just passive receivers. The value of this paper is that it is arguably the first attempt to chart a new perspective and communication delivery methods for research and practice in agricultural extension programmes in Nigeria.
