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.
10 pages, Agricultural environment in many developing economies has become increasingly unpredictable in recent decades as a result of climate change, increasing the risk of crop failure. Access to meaningful information is required to mitigate the negative effects of the changing environment. This study examined the impact of agricultural extension services on the adoption of soil and water conservation (SWC) practices using data obtained from farming households in Northern Ghana. A multivariate probit model was used to assess the simultaneous or/and substitution adoption of SWC practices, while endogenous switching probit (ESP) was used to estimate the impact of extension services on adoption of SWC practices to account for observed and unobserved heterogeneities. The results showed that most of the SWC practices were adopted jointly, and factors such as non-farm economic activites and farm size influence the adoption of SWC practices. Moreover, farmers who accessed agricultural extension services had a higher probability of adopting most of the SWC practices (crop rotation, contour ploughing and manure application), and those who did not benefit from extension services would have had an equally higher likelihood of adopting the SWC practices had they accessed the services. The findings of the study imply that enhancing agricultural extension services will reduce adoption gaps in SWC practices, and consequently reduce farmers’ exposure to climate-related agricultural production risks. With growing information and communication technologies, pluralistic extension service delivery that mixes governmental and private-sector-led approaches to extension operations to foster demand-driven extension delivery services are highly recommended.
19 pages, The global climate change and rapid population increase are raising challenges for food security, and it demands efficient crop improvement methods that ensure superior quality and quantity of the crops. The advancements in nanotechnology can be explored to enhance sustainable crop improvement. Recently, nanotechnology has made massive revolutions in solving various problems faced by the human population, including the agriculture, environment and food sectors. In agriculture, nanotechnology has implications on every stage of farming, including seed germination, growth, harvest, processing, storage and transport of agricultural products. Nano fertilisers, nano herbicides, nano-fungicides, nano biosensors, nanoscale genetic carriers, nano-bioremediating agents and nanocomposites for packing are the novel applications of nanotechnology in the crop improvement area. Nanotechnology ensures the site-specific delivery of the nutrients in the plant's target region, which minimises the loss and increases efficiency. The reduced size of the nanomaterials offers a broader surface area for pesticides and fertilisers, drastically escalating disease and pest control in crops as they promise to overcome the shortcomings caused by traditional pesticide application. The advancement in nanotechnology is rapidly contributing to the digitalization of agriculture also. For example, nanotechnology widens the horizons of high-tech agricultural farms with the aid of biosensors.
The synthesis of nano enzymes also revolutionized the stress-tolerant mechanism of the plants by acting as an efficient antioxidant enzyme, and it has been widely used against salinity tolerance recently. The contribution of nanotechnology in effective transfer of genetic material in gene editing and genetic engineering techniques has also significantly contributed towards crop improvement. Nanobioremediation and nanophotocatalysis methods can also remove toxic substances from the environment. It is clear that, nanotechnology driven agri-food sector is expected to bloom in the near future. This review article summarizes the potential benefits of nanotechnology in agriculture and related fields, including the environment and food industry. Although nanotechnology has contributed a lot to the betterment of the world in various ways, they also face several limitations. Despite being a frontier of scientific advancement in the modern era, the negative impacts caused by nanotechnology cannot be sidelined. Therefore, this review also discusses the limitations of nanotechnology in the last section.
