8 pages, Commercial, Industrial and agricultural wastes are major soil pollutants, which contain inorganic, organic compounds and heavy metals. When these heavy metals accumulate in agricultural lands, they adversely affect on growth and physiology of crops ultimately causing decrease in food productivity. In this experiment maize was used to investigate the effects of heavy metals on plant physiology and growth. Maize is cultivated throughout the world for its importance as cereal. It is the third most important cereal crop, following wheat and rice. Maize is a significant food source for humans providing essential minerals, vitamins, carotene and ascorbic acid. Apart from its importance as a cereal source, it also serves as important raw material for various products such as syrup, starch and oil. Various concentrations of Cr and Mn were applied individually as well as in combination to examine their effects on growth and physiology of maize. Analysis of recorded data showed that the treatment 0.5 mM MnCl2 + 0.25 mM CrCl3 had the most harmful effect and caused significant decrease in height, number of leaves and chlorophyll 'a' and 'b' in the stems and leaves. While less harmful effects were seen when heavy metals were applied individually such as 0.25 mM CrCl3, 0.25 mM MnCl2 and 0.5 mM MnCl2 as these treatments did not significantly impact on height, leaf area and chlorophyll content in stems and leaves. So, from these results it can be concluded that. when chromium was applied separately, it had minimal impact on plant physiology and growth, but in combination with manganese, it severely affected on maize plants. Similarly, a small concentration of manganese alone did not affect plant growth, but combined with chromium, it negatively impacted photosynthetic pigments and growth traits.
14pgs, As an unobservable attribute, food safety is likely to be under-provided by markets where regulatory enforcement is weak. In such settings, stimulating consumer demand for safer food can potentially encourage market actors to invest in food safety. Through a randomized trial in Kenya, we test the impact of informing consumers about which maize flour brands are most likely to comply with the regulatory standard for aflatoxin, a carcinogenic fungal byproduct. Providing information on safer brands alone does not significantly affect consumption behavior. However, when the same information is combined with a test performed on the maize flour stocked by the household, the likelihood that a safer brand is consumed 2 months later is 76% higher than in the comparison group. Our findings suggest that providing information on the relative riskiness of substitute foods could encourage consumers to make safer choices.
9 pages, This paper compares the supply and demand of agricultural technologies related to maize crop in Sussundenga district, Mozambique. The field work was carried out in February and March 2018 and comprises of a survey of 140 households’ maize growers, interviews with 15 agricultural technicians and six focus group meetings (four with maize growers and two with agricultural technicians). Data analysis was done using Bardin’s content analysis and descriptive statistics. The results reveal that agricultural research and rural extension focus more on supplying technologies related to maize production. But farmers have holistic expectations that go beyond production technologies to include the entire marketing chain. It makes the technical support provided with little use to maize growers. Besides it, there are also farmers’ unanswered demands and the supply of non-demanded technologies. It means that there is a mismatch between supply and demand of maize farming technologies. Agricultural research and rural extension organizations are suggested to supply not only agricultural technologies that maximize crop yield, but also services that help households improve their ability to store agricultural products and to sell it when prices are high. These actions have the potential to improve agricultural market performance and make the agricultural technologies more useful to maize growers.
27pgs, This study examines the effect of gender on marketing efficiency among maize producing households using data collected in the Dawuro zone, southern Ethiopia. Results indicate that the amount of maize assigned to the first ranked (most efficient) channel for male, female and joint decision-making households is significantly larger than that of the second, third, and fourth ranked channels, respectively. Significant results vary across gender categories at the same stage of marketing channel. Female decision-making households receive a lower producer price, as well as cover higher marketing costs and margins of middlemen, as compared to male and joint decision-makers at the same stage of the marketing channel. This study also found a limited financial ability for local institutions to establish maize storages in the study area. There is a need for an integrated agricultural marketing information system that would help female decision-making maize producers to better engage in available market opportunities.
20 pages, This paper assesses the impact of access to agricultural credit on the agricultural productivity of 422 smallholder farmers that cultivate maize or rice in the Western and Eastern province of Rwanda. Stratified, simple random and convenience sampling techniques were used to sample districts, sectors, cells and households. Data were collected using structured interviews and analyzed using propensity score matching techniques. Results indicated that productivity was higher by 44% among the farmers who accessed credit implying that they harvested on average an extra 440 kilograms of maize or rice. According to a crop-specific analysis, agricultural credit access had a more significant impact on maize productivity, with a difference in proportion of 68% (p = 0.000) but had no impact on rice productivity (p = 0.149). The study concludes that agricultural credit was important for Rwanda’s agricultural productivity. Thus policy measures should aim at improving smallholder farmers’ access to agricultural credit and promoting the use of modern agricultural inputs, particularly among rice farmers in Rwanda
35 pages, We use data from a randomised experiment in Uganda to examine effects of incentives
on the decision to adopt drought-tolerant maize varieties (DTMVs) and mechanisms
through which effects occur. We find that social recognition (SR) incentives to a
random subset of trained farmers – disseminating farmers (DFs) – increase knowledge
transmission from DFs to their co-villagers and change information networks of both
DFs and their neighbours. SR also increases DFs’ likelihood of adopting DTMVs.
However, the corresponding results for private material rewards are not conclusively
strong. We find no evidence that incentives for knowledge diffusion increase the
likelihood of co-villagers adopting DTMVs
An analysis of secondary data from the National Panel Survey in Tanzania revealed physical, socioeconomic, and institutional factors influencing the adoption of soil conservation technologies among small-scale maize farmers. Findings revealed, for example, only 13.9 percent of those had adopted soil conservation technology. This was cited as small, compared with other countries.
26 pages., via online journal., This paper employs the patent data of four major genetically modified (GM) crops, soybeans, cotton, maize and rapeseed, to illustratee how the innovation of GM crop technology diffused and distributed globally over time. Data collected from the Derwent Innovation Index, were employed to construct country patent citation networks, from 1984 to 2015, and the results revealed that developed countries were early adopters, and the primary actors in the innovation of GM crop technology. Only seven developing countries appeared in the country citation network. Most developed countries were reluctant to apply GM crop technology for commercial cultivation. Private businesses stood out in the patent citation network. The early adoption and better performance of developed countries can be explained by the activities of large established private companies.
