American Journal of Agricultural Research

  • Out-break, Distribution and Management of fall armyworm, Spodoptera frugiperda J.E. Smith in Africa: The Status and Prospects

    A review was made to highlight various research works done so far regarding to the introduction, distribution and managements of fall army worm in Africa. It has been reported that the fall armyworm, Spodoptera frugiperda (J. E. Smith) is an economically important pest native to tropical and subtropical America has recently invaded Africa there by causing substantial damage to maize and other crops. Accordingly, signals increased negative impacts on agricultural production and food security on the continent. Reports also suggested that this pest has already moved to at least 30 African countries. It was first detected in Central and Western Africa in early 2016 (Sao Tome and Principe, Nigeria, Benin and Togo) and from there proceeded further. Currently, in Africa the pest is causing huge damage to maize crop and has been estimated to 25-67% for maize in many countries. African continent provides favorable climatic conditions for a constant reproduction of the pest, which is expected to result in severe damage to high priority crops. Various control methods, including cultural, chemical and mechanical have been adopted and practiced by farmers in many African countries. Large-scale eradication efforts are neither appropriate nor feasible. Thus, in near future gathering and analyzing experiences and best practices from other countries where the pest is native will help to design and test a sustainable fall armyworm management program for smallholders in Africa. Furthermore, in order to reduce negative impacts associated with inappropriate usage of insecticide, emphasize should be given to develop or adopt the management practices which is environmentally safe.

  • Statistical Analysis Of Impact Of Climate Change On Crop Potentials Productivity On A Regional Scale In Nigeria

    Yield improvement is the main aim of all agricultural activities. Therefore, it is important to have an idea about the yield that can be produced from a piece of land before investing in it. This work is aimed at analysing the impact of climate change on crop yield potential and predicting the crop yield potential in six geo political zones in Nigeria using global solar radiation as the only limiting factors of production. Climatic data were obtained from Nigeria Meteorological Agency (NIMET), Oshodi, Nigeria. Results of impact of climate change on the photosynthetic, light-temperature, and climatic potential productivities of maize and their gap differences are presented using a crop growth dynamics statistical method. The results showed that photosynthetic potential productivity decreased from north to south, with the largest values in two maize-growing zones due to higher average growing season radiation and a longer maize growing season. The light-temperature potential productivity of maize was higher than photosynthetic potential productivity, which varied from 3223.99 to 4425.79 kg ha−1, with a mean of 3821.402 kg ha−1 and climatic potential productivity varied from 11279.92 to 29263.75 kg ha−1, with a similar distribution pattern to light-temperature potential productivity with a mean of 23817.32 kg ha−1. The gap between light temperature and climatic potential productivity varied from 6884.07 to 33506.92 kg ha −1, with the high value areas centered in Southern Nigeria.

  • Change and Instability in Area and Production of Rice in Bangladesh

    Rice is considered as one of the monumental sources of human energy in Bangladesh. It can be stated that a vital element by which agronomic sector has been earned most of the quantity of profits for national development in this country is rice. This study covers the data of rice including the time from1972 to 2016 has been collected from secondary sources of Bangladesh Bureau of Statistics. Different statistical tools have been used to complete the analysis. The analysis exposes that the area, production and yield of rice have improved meaningfully. Despite the production has been increased, It is not enough to full fill the shortage of the country. Therefore, advance research in this sector should be conducted with the assistance of researchers, government and policy makers. By this way new ideas and findings could be generated in order to improve the growth of rice.

  • Media and its Role in Agricultural Technology Transfer: the case of Dendi and Ejere weredas, Oromia, Ethiopia

    Agricultural extension organizations are entrusted with this primary task for which they use a variety of extension teaching methods/media. Among the mass media means of communication, radio is found to be the most important means of communicating agricultural information to the rural farmers. The study was conducted in Ethiopia, Oromia region west shoa zone two weredas of Dendi and Ejere . All the farmers living in the rural union councils of the district were considered as research population of the study. Multistage random sampling technique was used to draw the sample. The list regarding the rural union councils and villages of the district was obtained from office of the District Officer Agriculture (Ext.).From each of the two weredas, three peasant associations (PA) were selected randomly. From each of the selected villages, 30 farmers were selected at random. The sample comprised 180 respondents. Analysis was done by using Statistical Package for Social Sciences (SPSS), interpreted and discussed to draw conclusions. According to the result indicated, the mean value of age of farmers was 38 .Regarding family sizes; the average family size is 5. The average formal education level is grade 5. Majority of them (93.9%) have radio and they follow agricultural programs in Amharic language. Moreover, there are farmers following agricultural information in Radio of Oromifa language (96.7%). There was a great variation of followers in Fana broadcasting corporation (FBC) of Amharic and Oromifa 74 .4 and 95.6 percent respectively. The future intention for getting Agricultural information indicates improving mean value in each case as compared to the present use of electronic media. Concerning the preference for obtaining Agricultural information in future, Mobil was at the top (score=274) with mean value 3.86 indicating medium level of preference. Radio (223) acquired the 2nd position with mean value 3.54 showing preference levels between…

  • The Impact of Elevated CO2 and High Temperature on the Nutritional Quality of Fruits- A Short Review

    Fruits are essential components of modern diet. Fruit nutrients provide important benefits to human in various ways for better health. Phytochemicals in fruit vary in quality and quantity depending mainly on fruit species and cultivar. Additionally, these phytonutrients can also be affected by different environmental factors including atmospheric carbon dioxide (CO2) and temperature. The current changes and the continuous anticipated increase in the CO2 concentrations and temperature in the atmosphere has become a major challenge in crop production. The literature is rich with investigations of individual and combination effects of elevated CO2 and temperature on growth, development and yield of plants, including fruits. The purpose of this review is to evaluate the impacts of elevated CO2 and high temperature individually and interactively on nutritional quality of fruits. According to the reviewed literature, both elevated CO2 and temperature significantly influenced fruit nutrient content and availability. Elevated CO2 is expected to affect positively the fruits nutrient content, while mixed responses found for high temperature. Interaction effects of these factors are the most important since they are predicted to increase concomitantly. With available literature, the combination impact of these factors on fruit nutrients was discussed under three different hypotheses in this review. (1) high temperature may offset the positive effects of elevated CO2, (2) elevated CO2 would compensate for the negative effects of high temperature and (3) interactively, both elevated CO2 and temperature may increase or decrease the phytonutrients in fruits.

  • The Role of Information and Communication Technology (ICT) in Agriculture Productivity in India

    The study examined the role of ICT in agricultural productivity in India. It also analyzed the determinants of agricultural productivity. The causality test indicated the existence of long-run causality running from ICT and agricultural growth (AG) to economic growth. It showed bi-directional causality between agricultural growth and GDP. The long-run causality from ICT to AG was, however, uni-directional, implying the significance of ICT in agricultural growth. The determinants of agricultural productivity growth revealed increased machinery usage, investment in ICT, gross domestic capital formation and area under cultivation to be significantly contributing to increased productivity growth. The study suggests strengthening the effective implementation of ICT usage in Indian agriculture.

  • Fish Species Composition and Physico-Chemical Properties of Manjekin Reservoir, Adamawa State, Nigeria

    The objective of the study was to determine fish species composition and physico-chemical properties of Manjekin reservoir between March and June 2013. Fish samples were caught in the reservoir using different fishing gears. The results showed 13 fish species belonging to 9 families present in the reservoir which was considered rich enough for that type of water body. Two families, namely, Characidae and Clariidae constituted the dominant fish species in the reservoir with 34.42% and 8.08% respectively. Other fish species with significant dominance were centropomidae (7.84%) and mormyridae (7.36). The meristic and the morphometric features of fish species caught were also determined. The results of water quality showed variations in the monthly means and station values. Despite these variations, the values obtained were within the recommended range for fish culture, which most of the tropical fresh water fishes could tolerate. There is therefore, the need to evolve strong strategies that could allow effective utilization and management of the reservoir and other water bodies for optimum fish production in the study area.

  • Characterization of Some varieties of Durum Wheat (Triticum durum Desf) under Control and Water Stress Conditions.

    An experiment was implemented at INRAA research station located at Baraki, Algiers with the objective to characterize the behavior of seventeen genotypes of Durum wheat (Triticum Durum Desf) under water stress conditions. The experimental design adopted is that of split plot design with water regime (irrigated and non irrigated treatments) as main plots and varieties as sub plots and three repetitions. Leaf area, the relative water content (RWC%), chlorophyll content and tillers production were very significantly (p

  • The most frequent and credible source of information on natural health products

    The study looks at the various information sources of natural health products and credibility of these sources. Television was the most frequent source of information on natural health products as half (51%) of the respondents were frequently exposed to the television. Consumers also trusted television most since this source is regulated. Before consumers purchase natural health products however, they consult family and friends since these sources have testimonies that can be trusted. The researcher recommends that the Food and Drugs Authority should implement policies that would check the efficacy of herbal medicine advertised on the television. If possible, the Food and Drugs Authority should implement policies to make efficacy test of herbal medicine advertised on television the same as orthodox medicine. This would enhance trust in consumers of natural health products. Information source from community center and social media should go through some form of registration authorized by the Food and Drugs Authority in order to increase trust of consumers who patronise these sources.

  • Correlation and Path Coefficient Analysis for Agronomical Traits of Lowland adapted Ethiopian Sorghum [Sorghum bicolor (L.) Moench] Genotypes

    The association of traits that may exist between or among sorghum characters is essential for breeders. Therefore, the present study is aimed to analyze and determine the traits having greater association with yield utilizing the correlation and path analysis for different traits of early and medium maturing lowland adapted Ethiopian sorghum genotypes. A total of 110 early and medium maturing sorghum genotypes were used in alpha lattice design which is replicated twice at two locations in 2016 cropping season. The results of correlation analysis suggested that the magnitude of genotypic correlation coefficients were higher than the corresponding phenotypic correlation coefficients for most of the traits suggesting that there was inherent relationship between these traits. Grain yield showed significant and positive phenotypic correlation with number of heads per plot (r=0.34**), panicle weight (r=0.19**) and hundred grain weight (r=0.21**). The strongest phenotypic association was observed between days to flowering and days to maturity (r= 0.53**) followed by hundred grain weight and plant height (r= 0.47**). In addition path coefficient analysis provides an effective means of finding direct and indirect causes of association.