Organic agriculture world-wide allows farmers to produce healthy food with low levels of external inputs, and often shortens the value chains, giving farmers a higher share of the consumer dollar. ...This book reports on long-term comparative organic farming systems research trials carried out over the last four years in South Africa's Southern Cape, as well as research on the organic sector and the technical tools it requires in South Africa, Zambia, Uganda and Tanzania. The trials show how the yield gap between organic and conventional crops was closed over 3 years. Water use efficiency was also greater in the organic farming system, and pests and diseases were effectively controlled using biological products. Farmer training approaches, soil carbon analysis, participatory guarantee systems, the Zambian organic farming sector (agronomy) and Ugandan organic farmer training support, and a sector plan for southern African organic farming are examined.
Euphorbia dentata (Euphorbiaceae), an invasive weed, is rarely eaten by herbivorous insects and could secrete a large amount of white latex, causing a serious threat to local natural vegetation, ...agricultural production and human health. In order to prevent this plant from causing more negative effects on humans, it is necessary to understand and utilize the chemical relationships between the latex of E. dentata and herbivorous insects. In this study, three new norsesquiterpenes (1–3), together with seven known analogues (4–10), were isolated and identified from the latex of E. dentata. All norsesquiterpenes (1–10) showed antifeedant and growth-inhibitory effects on H. armigera with varying levels, especially compounds 1 and 2. In addition, the action mechanisms of active compounds (1–3) were revealed by detoxifying enzyme (AchE, CarE, GST and MFO) activities and corresponding molecular docking analyses. Our findings provide a new idea for the development and utilization of the latex of E. dentata, as well as a potential application of norsesquiterpenes in botanical insecticides.
Beginning as a small protest to the industrialization of agriculture in the 1920s, organic farming has become a significant force in agricultural policy, marketing, and research. No longer dismissed ...as unscientific and counterproductive, organic techniques are now taken seriously by farmers, consumers, scientists, food processors, marketers, and regulatory agencies in much of the world. Organic farming is both dynamic and forward-looking but is also rooted in tradition. It is these traditions that can provide valuable starting points in debates over how organic farming should meet new challenges such as globalization, the emergence of new production techniques, and growing concern over equity and social justice in agriculture. Complementing general discussions with case histories of important organic institutions in various countries, this comprehensive discussion is the first to explore the development of organic agriculture. This title is now also available in paperback.
This book provides a timely analysis and assessment of the potential of organic agriculture (OA) for rural development and the improvement of livelihoods. It focuses on smallholders in developing ...countries and in countries of economic transition, but there is also coverage of and comparisons with developed countries. It covers market-oriented approaches and challenges for OA as part of high value chains and as an agro-ecologically based development for improving food security. It demonstrates the often unrecognised roles that organic farming can play in climate change, food security and sovereignty, carbon sequestration, cost internalisations, ecosystems services, human health and the restoration of degraded landscapes. The chapters specifically provide readers with:
an overview of the state of research on OA from socio-economic, environmental and agro-ecological perspectives
an analysis of the current and potential role of OA in improving livelihoods of farmers, in sustainable value chain development, and in implementation of agro-ecological methods
proposed strategies for exploiting and improving the potential of OA and overcoming the constraints for further development
a review of the strengths and weaknesses of OA in a sustainable development context
As organic food increases in popularity, there has been increased interest in the history of organic farming. Previous scholarship has done excellent work documenting the social and political aspects ...of organic and sustainable agriculture, but less research has been done on the history of organic farming methods. The purpose of this study was to address this deficiency by surveying the organic and sustainable farming community in the midwestern and northeastern United States to identify influential authors, publications and organizations. Information about influences on farming practices was created using an anonymous online survey, distributed through organic and sustainable agriculture organizations in the target region. Out of the 224 respondents who completed the survey, 171 (76%) listed books, 169 (75%) listed organizations and 123 (55%) listed influential individuals. A total of 218 authors were identified, with Eliot Coleman receiving the most mentions, followed by Rodale publications, Wendell Berry, Acres U.S.A. magazine, Masanobu Fukuoka, Joel Salatin and Michael Pollan. 242 organizations were listed, with Marbleseed (MOSES), MOFGA, NOFA, PASA, OEFFA, LSP, SFA-MN and MOFFA most frequently mentioned. These results provide a useful starting point for future research on the development and dissemination of farming methods in this region. Research priorities include conducting oral histories with still-living authors of influential books and archiving organizational records before critical historical information is lost.
The quality of flour is influenced by various factors including genotype, environmental and agronomic conditions, post-harvest grain storage, and milling technology. Currently, the EU focuses on ...reducing mineral fertilization and promoting less intensive agrotechnology (organic and integrated farming). This research aimed to assess the baking value of flour obtained from four spring wheat cultivars cultivated in three farming systems: organic (ORG), integrated (INT), and conventional (CONV). The wheat grains were sourced from a three-year field experiment (2019–2021) conducted at IUNG-PIB in Pulawy, Poland. Results indicate that the CONV generally yielded more favourable qualitative parameters for the flour, including significantly higher protein content, wet gluten, falling number, and farinographic characteristics such as dough development, stability time, and quality number. Nevertheless, most flours from the ORG system met the quality requirements for the baking industry, showing adequate protein content, wet gluten, and falling number. However, flours from the INT system stood out due to significantly higher water absorption, resulting in increased dough and bread yield. Additionally, bread baked from these flours exhibited a significantly higher bread volume. In sensory evaluation, bread from CONV flours received the highest scores, although the differences in the overall acceptability were not significant.
Legumes and their interaction with rhizobia represent one of the most well-characterized symbioses that are widespread across both natural and agricultural environments. However, larger distribution ...patterns and host associations on isolated Pacific islands with many native and introduced hosts have not been well-documented. Here, we used molecular and culturing techniques to characterize rhizobia from soils and 24 native and introduced legume species on the island of O'ahu, Hawai'i. We chose two of these isolates to inoculate an endemic legume tree, Erythina sandwicensis to measure nodulation potentials and host benefits. We found that all rhizobia genera can be found in the soil, where only Cupriavidus was found at all sites, although at lower abundance relative to other more common genera such as Rhizobium (and close relatives), Bradyzhizobium, and Devosia. Bradyrhizobium was the most common nodulator of legumes, where the strain Bradyrhizobium sp. strain JA1 is a generalist capable of forming nodules on nine different host species, including two native species. In greenhouse nursery inoculations, the two different Bradyrhizobium strains successfully nodulate the endemic E. sandwicensis; both strains equally and significantly increased seedling biomass in nursery inoculations. Overall, this work provides a molecular-based framework in which to study potential native and introduced rhizobia on one of the most isolated archipelagos on the planet.
“Africanized” honey bees (AHB) have been part of California's agricultural and natural landscapes for nearly three decades. Prior to their arrival in 1994, leading honey bee experts expressed concern ...over the potentially disastrous impact of AHB on California agriculture and public safety. Despite these concerns, the state's agricultural production has not been significantly impacted by AHB. However, some evidence suggests that the abundance of AHB in natural habitats can have negative consequences for native pollinators. At the same time, AHB may provide a genetic resource for improving managed honey bee health. We recommend updating the term “Africanized” honey bees to more accurately reflect their biology and to avoid unfortunate connotations.
PDF
