Nanomaterials and nanotechnology for the delivery of agrochemicals: strategies towards sustainable agriculture

Nanomaterials (NMs) have received considerable attention in the field of agrochemicals due to their special properties, such as small particle size, surface structure, solubility and chemical composition. The application of NMs and nanotechnology in agrochemicals dramatically overcomes the defects of conventional agrochemicals, including low bioavailability, easy photolysis, and organic solvent pollution, etc. In this review, we describe advances in the application of NMs in chemical pesticides and fertilizers, which are the two earliest and most researched areas of NMs in agrochemicals. Besides, this article concerns with the new applications of NMs in other agrochemicals, such as bio-pesticides, nucleic acid pesticides, plant growth regulators (PGRs), and pheromone. We also discuss challenges and the industrialization trend of NMs in the field of agrochemicals. Constructing nano-agrochemical delivery system via NMs and nanotechnology facilitates the improvement of the stability and dispersion of active ingredients, promotes the precise delivery of agrochemicals, reduces residual pollution and decreases labor cost in different application scenarios, which is potential to maintain the sustainability of agricultural systems and improve food security by increasing the efficacy of agricultural inputs. Graphical Abstract

Rice quality and its impacts on food security and sustainability in Bangladesh

Rice market efficiency is important for food security in countries where rice is a staple. We assess the impact of rice quality on rice prices, food security, and environmental sustainability in Bangladesh. We find that while price varies as expected for most quality attributes, it is unaffected by a broken percentage below 24.9 percent. This reveals a potential inefficiency, considering the average 5 percent broken rate observed in the market. An increase in the broken rate of milled rice within the limits supported by our findings can, ceteris paribus, increase rice rations by 4.66 million a year, or conversely, yield the current number of rice rations using 170.79 thousand fewer hectares and cutting emissions by 1.48 million metric tons of CO2 equivalent. Thus, producing rice based on quality assessment can improve food security and its sustainability.

PELATIHAN DAN PENYULUHAN PENDIRIAN BUMDES DAN KOPERASI PADA KELOMPOK TANI DESA PESISIR BUKIT, KECAMATAN GUNUNG TUJUH, KABUPATEN KERINCI

Agricultural development policies are implemented to improve food security, develop agribusiness, and improve farmers' welfare so that the agricultural products produced must meet the requirements for quantity, quality, and sustainability, as well as being competitive and easy to obtain at affordable prices. The potential that exists in the form of food agricultural products, horticultural plantations, livestock, and agro-tourism development needs to be managed properly through the existence of BUMDes and village cooperatives. Therefore, mentoring activities, in the form of training and counseling on the procedures for establishing BUMDes and cooperatives for the sustainability of agricultural product management, both pre- and post-harvest. This service will provide training and counseling to farmer groups in Pesisir Bukit Village, Kerinci Regency, so that they can establish BUMDes and cooperatives to increase agricultural commodity yields and develop village potential. The end result of this service activity is that farmers can manage agricultural products and develop village potential through BUMDes and cooperatives so that they have an impact on improving living standards.

Millets Cereal Grains: Nutritional Composition and Utilisation in Sub-Saharan Africa

Millets are small to medium size cereal grain crops that are cultivated throughout the tropics and subtropical region. The grains are used for food and fodder for feeding animals around the globe. Millets have great economic, health importance, gluten-free, have low glycemic index and are known as “nutra–cereals”. The grains are mostly utilised as a food source by population with lower socio-economic factors which are traditional consumers in the farm and village levels. They are rich sources of carbohydrates, protein, crude fibre, phytochemicals, minerals, and vitamins. They are processed by using different traditional processes such as soaking, germination, malting, fermentation, milling or grinding, cooking, roasting and popping. Millet grains/ flours are utilised and consumed as flat breads, biscuits, snacks, beverages, porridges, chapati, dosa, pastas. There is a need to produce new value-added products from millets which is underutilised crop to improve food security and prevent micronutrients deficiencies.

Rheological Characterization of Chapatti (Roti) Enriched with Flour or Paste of House Crickets (Acheta domesticus)

Addition of edible insects to food products may improve the nutritional status but can also influence their techno-functional properties. This study investigates the impact of supplementing wheat flour by cricket flour or paste at different levels (5–15%) on the rheological and textural properties of flour, dough, and baked chapatti. Addition of freeze-dried cricket flour resulted in the highest water absorption. The storage modulus increased at higher level (10–15%) of supplementation to wheat flour indicating an increased dough consistency. Similarly, biaxial extension of the dough showed an increased resistance to extension and decreased extensibility at higher level of supplementation due to a reduced strength of the gluten network. Uniaxial extension of baked chapatti showed less extensible and harder chapatti with the addition of a higher amount of cricket flour or paste. At lower level (5%), incorporation of cricket flour resulted in chapatti with textural properties comparable to the reference. Oven dried cricket powder is suggested as the best option for incorporating in chapatti dough to improve food security in Asian Countries.

Social Learning and Paulo Freire Concepts for Understanding Food Security Cases in Brazil

Food insecurity is a wicked, complex, and critical problem. Although evidence supporting a wide range of assertions regarding the outcomes of social learning is still being investigated, its potential to improve food security challenges is growing. Nonetheless, more work is needed to understand when and how social learning-oriented approaches are effective in food security situations. We address this gap by investigating how elements of social learning and Freire’s key concepts are exemplified in existing real-world experiences of food security in rural communities. The case studies in Brazil, Community Seed Banks in Paraíba State, in the northeast and Biodiversity Kit in Guaraciaba, Santa Catarina State, in the south, are examples of small farmers facing and overcoming their limit-situation of food insecurity through celebrating, planting, and saving traditional seeds (landraces). A mixed-methods approach was applied based on semi-structured interviews and a literature review. The key findings show that local initiatives based on the interconnections of social learning and Freire´s concepts have improved food security in two cases. The practice of landrace rescue as a food security strategy is strengthened through a culture of closeness and solidarity, through values that are celebrated in the festivities, community meetings, and other exchanges of experiences. Applications of our conceptual framework in operational interventions show clear potential for generating the necessary changes for a more sustainable world, specifically in food security and sovereignty projects, as described in the cases studies.