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AbstractThere is ongoing debate among stakeholders about the future development of agricultural and food systems to meet the global challenges of food supply, biological and cultural diversity, climate change, and social justice. Among other options, agroecology and organic agriculture are discussed. Both have similar goals and use a systems approach; however, they are recognised and received differently by stakeholders. Here we review and compare principles and practices defined and described in EU organic agriculture regulations, International Federation of Organic Agricultural Movement (IFOAM) norms, and agroecology scientific literature. The main finding are as follows: (1) Regarding principles, EU organic regulations mainly focus on appropriate design and management of biological processes based on ecological systems, restriction of external inputs, and strict limitation of chemical inputs. IFOAM principles are very broad and more complete, and include a holistic and systemic vision of sustainability. Agroecology has a defined set of principles for the ecological management of agri-food systems, which also includes some socio-economic principles. (2) Many proposed cropping practices are similar for EU organic, IFOAM, and agroecology, e.g. soil tillage, soil fertility and fertilisation, crop and cultivar choice, crop rotation, as well as pest, disease and weed management. In contrast, the origin and quantity of products potentially used for soil fertilisation and pest, disease, and weed management are different. Additionally, some practices are only mentioned for one of the three sources. (3) In animal production, only a few proposed practices are similar for EU organic, IFOAM, and agroecology. These include integration of cropping and animal systems and breed choice. In contrast, practices for animal management, prevention methods in animal health, animal housing, animal welfare, animal nutrition, and veterinary management are defined or described differently. (4) Related to food systems, organic agriculture focusses on technical aspects, such as food processing, while in agroecology there is a prominent debate between a transformative and conformative agenda. Both agroecology and organic agriculture offer promising contributions for the future development of sustainable agricultural production and food systems, especially if their principles and practices converge to a transformative approach and that impedes the conventionalisation of agro-food systems.

HighlightsAnalyze the primary causes of cathode failure in three representative batteries, illustrating their underlying regeneration mechanism.The latest research status of direct regeneration of spent lithium–ion batteries was reviewed and summarized in focus. The application examples of direct regeneration technology in production practice are introduced for the first time, and the problems exposed in the initial stage of industrialization were revealed.Direct regeneration method has been widely concerned by researchers in the field of battery recycling because of its advantages of in situ regeneration, short process and less pollutant emission. In this review, we firstly analyze the primary causes for the failure of three representative battery cathodes (lithium iron phosphate, layered lithium transition metal oxide and lithium cobalt oxide), targeting at illustrating their underlying regeneration mechanism and applicability. Efficient stripping of material from the collector to obtain pure cathode material has become a first challenge in recycling, for which we report several pretreatment methods currently available for subsequent regeneration processes. We review and discuss emphatically the research progress of five direct regeneration methods, including solid-state sintering, hydrothermal, eutectic molten salt, electrochemical and chemical lithiation methods. Finally, the application of direct regeneration technology in production practice is introduced, the problems exposed at the early stage of the industrialization of direct regeneration technology are revealed, and the prospect of future large-scale commercial production is proposed. It is hoped that this review will give readers a comprehensive and basic understanding of direct regeneration methods for used lithium-ion batteries and promote the industrial application of direct regeneration technology.

High tunnel tomatoes are a high-value crop for many vegetable growers in New England. We conducted a survey to gain a better understanding of grower concerns, production practices, infrastructure, yield, and revenue for tunnels growing in-ground, trellised, and irrigated hybrid “slicer” tomato cultivars. We found that top grower concerns were soil fertility and plant diseases (cited by 51% and 45% of growers, respectively). At least two-thirds of tunnels were managed with organic practices, produced winter greens after tomatoes, had manual roll-up sides and large endwalls for passive ventilation, had horizontal air flow (HAF) fans for air circulation, had plants that were not lowered, used fertigation, relied on passive pollination, were sprayed to manage disease, and used biocontrols for insect pests. Approximately one-half the tunnels had air heating systems, had grafted plants, had not been rotated out of tomatoes, had nonthinned flower clusters, used Geronimo and/or Rebelski cultivars, had a plant density of 4 to 6 ft 2 /stem, and were mulched with black plastic and/or landscape fabric. Total yield reported by growers was 0.74 to 5.35 lb/ft 2 , with an average of 2.18 lb/ft 2 . The average marketable yield was 1.78 lb/ft 2 . The average retail price was $4.56/lb. Tunnels with the 10 highest yields averaged 3.15 lb/ft 2 or twice the average of other tunnels. Practices in the high-yielding tunnels that also had an adoption rate 50% or greater than the rate in the low-yielding tunnels included automatic roll-up sides, air heating, grafted plants, and HAF fans.

The current study examined the impact of adult black soldier fly (Hermetia illucens (L.)), age on reproductive output. Four treatments consisting of an equal sex ratio of the following combinations were used: 2-day-old males with 2-day-old females (YMYF); 6-day-old males with 2-day-old females (OMYF); 2-day-old males with 6-day-old females (YMOF); 6-day-old males with 6-day-old females (OMOF). Adult age was a significant factor for the overall number of mating events observed, withYMYF having 2.2× more thanYMOF and 2.7× more than OMOF. Time was a significant factor in the number of mating events observed, with 97.8% observed on days 2–6. Age was not a significant factor for the total number of oviposition events, but the inclusion of time as a factor was significant, with 91.5% of all events occurring on days 2–6. Treatment and trial significantly interacted with egg production. This response can be attributed to treatments containing old females, which had a 50% variation in egg output across trials. Treatments containing young females were consistent in terms of egg production. As anticipated, due to oviposition events, 94.8% of total eggs were oviposited on days 2–6. Fecundity and egg hatch were also significantly impacted by female age, with a 50% reduction in both cases across trials occurring in old females.Young females paired with old males had a 20% reduction in egg hatch, but this difference was not statistically significant.

PurposeExploring ways to sustain competitive positions as well as improve firm performance through environmental production initiatives has been a major preoccupying topic for mostly practitioners and researchers. Despite several studies on the influence of environmental initiatives on firm performance, many questions remain unanswered as to how to further extract more gains from environmental production initiatives. This study, thus, explores environmental production practices impact on firm performance from proactive and reactive perspectives.Design/methodology/approachThe study adopted a survey research design, a quantitative approach and partial least square structural equation modelling (PLS-SEM) technique in making data analysis and interpretations due to its suitability for predictive research models.FindingsThe results indicated that proactive environmental production practices positively related with process and environmental performances but negatively associated with financial performance. Although the findings contrast with majority of past findings, they gain the support of other scholars in establishing that early adoption stages of proactive environmental production initiatives strain financial capabilities and thus present a negative relationship. Reactive environmental production practices are positively and significantly related with process, environmental and financial performances.Originality/valueThe study is among the first to expose environmental production practices from a proactive and a reactive perspective and in the context of a developing country. As such, the study provides guidance to relevant authorities in further promoting sustainable production practices to preserve the environment by manufacturing safer consumer products through efficient sustainable production processes and practices.

Insect manure or “frass” has emerged as an alternative nutrient source for alleviating the dependence on fossil fuel-based fertilizers, reducing food waste, and promoting food security. Yet, research on insect frass chemical composition is in its infancy. Here, we assessed the chemical properties of yellow mealworm (Tenebrio molitor L.) frass compared with poultry litter (PL). Insect frass was obtained from the National Biological Control Laboratory (NBCL; IF-L) and an insect-rearing company (IF-C). PL was collected from facilities in Arkansas (PL-AR) and North Carolina (PL-NC). Samples were analyzed for pH, electrical conductivity, macro- and micronutrients, heavy metals, pathogens, and indicator microorganisms. On average, insect frass had 43% and 47% higher C and N than PL, respectively (P < 0.05). Considering a 5 mg/ha application rate, IF-C can supply 159 kg N/ha, twice the N supply of PL-AR (78 kg/ha). IF-L had a 53% higher P supply than PL-NC. Mean K, Ca, S, and micronutrient contents were higher in PL than in frass (P < 0.05), whereas As, Cd, Cr, and Pb were nearly absent in frass. Chemical composition and pathogens in fertilizer sources were largely affected by insect-rearing substrate and supplements used in poultry and insect production. Insect frass utilized in this study had optimum C and N rates relative to PL, suggesting a promising soil amendment for improving soil health and C sequestration, thus contributing to sustainable agricultural intensification and reuse of food waste in circular economies. Graphical Abstract

The utilization of yellow mealworm, Tenebrio molitor (Linnaeus, Coleoptera: Tenebrionidae), for food and feed is gaining interest globally. However, its production is hindered by expensive commercial diets. This study assessed mealworm growth performance, survival, bioconversion, and nutritional composition when fed on wheat bran (WB) with different inclusion levels (25%, 50%, 75%, and 100%) of Irish potato waste (PW). Results indicated that mealworms fed on diets with 25%–75% PW had increased body length and 1–2 times higher weight gain compared to sole WB and PW diets. The survival rate was 93%–94% across all diets. Mealworms fed on WB had a feed conversion ratio of 3.26, while the efficiency of diet conversion increased with PW inclusion levels. Mealworms fed on diets with 75% PW inclusion had the highest crude fat (48%) and energy levels (598 kcal/100 g), while sole WB produced mealworms with the highest crude protein (55%). The acid detergent fiber achieved using 100% WB was 2- to 3-fold higher, but the crude fiber and neutral detergent fiber did not vary significantly. Considerable amounts of lysine (1.6–2 mg/100 g), methionine (0.5–0.7 mg/100 g), leucine (1.4–2 mg/100 g), and threonine (0.8–1 mg/100 g) were achieved in the mealworm larvae. Our findings revealed that cheap agricultural by-products could be successfully used for the mass production of mealworms, substantially contributing to reduced production costs. Further exploration of the nutrient-dense mealworm larvae for the development of novel food and feed products is crucial.

Over the past 2 decades, the potential of insects as food and feed has been recognized globally. Insects as feed ingredients can improve sustainability because of their lower greenhouse gas emissions and their potential to transform organic wastes into high-quality feed rich in nutrients. However, currently, the practical use of insects as food or feed is limited by the high costs of insect production. A great deal of effort is required to improve the rearing technology necessary to establish the principles of insect farming. Several insect species have become industrialized using existing methods of production. The most common industrialized insect species intended as feed and food include the yellow mealworm, Tenebrio molitor L. (Coleoptera:Tenebrionidae); the house cricket, Acheta domesticus L. (Orthoptera: Gryllidae); the black soldier fly, Hermetia illucens L. (Diptera: Stratiomyidae); and the house fly, Musca domestica L. (Diptera: Muscidae). This review focuses on describing the existing rearing methods for these 4 insect species, which may provide a basis for future research to enhance insect production capabilities.

PurposeThe purpose of this paper is to investigate the direct and mediation effects of small- and medium-sized enterprises' (SMEs) ecopreneurship posture (EP), green inbound practices (GIP), green production practices (GPP), green outbound practices (GOP), community-based performance (CBP) and green competitiveness (GC).Design/methodology/approachEmpirical data for the study were garnered by utilizing questionnaire from Ghanaian manufacturing SMEs. Structural equation modeling, specifically partial least squares is applied to test the hypothesized relationships.FindingsThe findings suggest that SMEs' EP, GIP and GPP have significant positive effects on CBP and GC. However, while GOP has a significant effect on GC, it has no significant effect on CBP. Moreover, the mediation result demonstrates that while GIP and GPP significantly mediates the relationship between SMEs' EP and CBP, GOP does not provide any mediation mechanism through which SMEs' EP influence CBP. The result further confirms the mediation roles of GIP, GPP and GOP between SMEs' EP and GC.Originality/valueThis research offers novel empirical evidence by exploring the mediation roles of GIP, GPP and GOP between EP, CBP and GC through the lenses of the natural resource-based view and stakeholder theoretical perspectives.

Sustainable cashmere production in Mongolia needs to reduce the negative impact of production on the environment and society. However, the industry still bears responsibility for significant resource consumption and disposal and has not yet taken the necessary transformative measures to fully sustainable production transition. In this context, the production method enhancement is still insufficient although it is preparing for the transition to sustainable practices. This study aims to determine the valid attributes of sustainable production as a hierarchical structure and the interdependence relationships using a hybrid of the fuzzy Delphi method, fuzzy decision-making trial and evaluation laboratory, and analytic network process. As a result, 4 aspects and 15 criteria are validated as a sustainable production hierarchical structure. Cleaner production practices and supply chain greening are indicated as the major aspects. The practical criteria are carbon accounting, wastewater reduction, investment in recycling-related research and development, eco-design, and green manufacturing.