scholarly journals A Conceptual Framework for Incorporation of Composting in Closed-Loop Urban Controlled Environment Agriculture

2021 ◽  
Vol 13 (5) ◽  
pp. 2471
Author(s):  
Ajwal Dsouza ◽  
Gordon W. Price ◽  
Mike Dixon ◽  
Thomas Graham
Keyword(s):  
Carbon Dioxide ◽  
Conceptual Framework ◽  
Crop Production ◽  
Closed Loop ◽  
Crop Residues ◽  
Production Systems ◽  
Environmental Benefits ◽  
Future Research ◽  
Controlled Environment ◽  
Controlled Environment Agriculture

Controlled environment agriculture (CEA), specifically advanced greenhouses, plant factories, and vertical farms, has a significant role to play in the urban agri-food landscape through provision of fresh and nutritious food for urban populations. With the push towards improving sustainability of these systems, a circular or closed-loop approach for managing resources is desirable. These crop production systems generate biowaste in the form of crop and growing substrate residues, the disposal of which not only impacts the immediate environment, but also represents a loss of valuable resources. Closing the resource loop through composting of crop residues and urban biowaste is presented. Composting allows for the recovery of carbon dioxide and plant nutrients that can be reused as inputs for crop production, while also providing a mechanism for managing and valorizing biowastes. A conceptual framework for integrating carbon dioxide and nutrient recovery through composting in a CEA system is described along with potential environmental benefits over conventional inputs. Challenges involved in the recovery and reuse of each component, as well as possible solutions, are discussed. Supplementary technologies such as biofiltration, bioponics, ozonation, and electrochemical oxidation are presented as means to overcome some operational challenges. Gaps in research are identified and future research directions are proposed.

scholarly journals Barriers and bridges to the adoption of biodegradable plastic mulches for US specialty crop production

2013 ◽  
Vol 30 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Jessica R. Goldberger ◽  
Robert Emmet Jones ◽  
Carol A. Miles ◽  
Russell W. Wallace ◽  
Debra A. Inglis
Keyword(s):  
Crop Production ◽  
Production Systems ◽  
Ease Of Use ◽  
Biodegradable Plastic ◽  
Environmental Benefits ◽  
Design Development ◽  
Plastic Mulch ◽  
Specialty Crop ◽  
Study Results ◽  
Polyethylene Mulch

AbstractCommercial farmers have been using polyethylene plastic mulch since the 1950s. Despite the affordability and effectiveness of polyethylene mulch, the disposal process is financially and environmentally costly. Biodegradable plastic mulches, an ecologically sustainable alternative to polyethylene mulch films, were introduced in the 1980s. Biodegradable plastic mulches can be tilled into the soil or composted at the end of the season, reducing the labor and environmental costs associated with plastic removal and disposal. However, research results are mixed as to the effectiveness, degradability and ease-of-use of biodegradable plastic mulches. In 2008–2012, researchers, funded by a USDA Specialty Crop Research Initiative grant, conducted surveys and focus groups in three different agricultural regions of the USA to better understand the barriers and bridges to the adoption of biodegradable plastic mulches for specialty crop production systems. Data on the experiences and views of specialty crop growers, agricultural extension agents, agricultural input suppliers, mulch manufacturers and other stakeholders showed that the major adoption barriers were insufficient knowledge, high cost and unpredictable breakdown. The major bridges to adoption were reduced waste, environmental benefits and interest in further learning. These findings are discussed with reference to the classic innovation diffusion model, specifically work on the innovation–decision process and the attributes of innovations. The study results can be used to guide the activities of those involved in the design, development and promotion of biodegradable plastic mulches for US specialty crop production systems.

scholarly journals Comparison of the Effect of Perennial Energy Crops and Arable Crops on Earthworm Populations

Agronomy ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 675 ◽  
Author(s):  
Feledyn-Szewczyk ◽  
Radzikowski ◽  
Stalenga ◽  
Matyka
Keyword(s):  
Winter Wheat ◽  
Crop Production ◽  
Crop Residues ◽  
Production Systems ◽  
Arable Land ◽  
Energy Crops ◽  
Integrated System ◽  
Species Number ◽  
Organic System ◽  
Perennial Energy Crops

The purpose of the study was to compare earthworm communities under winter wheat in different crop production systems on arable land—organic (ORG), integrated (INT), conventional (CON), monoculture (MON)—and under perennial crops cultivated for energy purposes—willow (WIL), Virginia mallow (VIR), and miscanthus (MIS). Earthworm abundance, biomass, and species composition were assessed each spring and autumn in the years 2014–2016 using the method of soil blocks. The mean species number of earthworms was ordered in the following way: ORG > VIR > WIL > CON > INT > MIS > MON. Mean abundance of earthworms decreased in the following order: ORG > WIL > CON > VIR > INT > MIS > MON. There were significantly more species under winter wheat cultivated organically than under the integrated system (p = 0.045), miscanthus (p = 0.039), and wheat monoculture (p = 0.002). Earthworm abundance was significantly higher in the organic system compared to wheat monoculture (p = 0.001) and to miscanthus (p = 0.008). Among the tested energy crops, Virginia mallow created the best habitat for species richness and biomass due to the high amount of crop residues suitable for earthworms and was similar to the organic system. Differences in the composition of earthworm species in the soil under the compared agricultural systems were proven. Energy crops, except miscanthus, have been found to increase earthworm diversity, as they are good crops for landscape diversification.

Smart Manufacturing and Industry 4.0: A Preliminary Approach in Structuring a Conceptual Framework

2021 ◽  
Vol 18 ◽  
pp. 27-36
Author(s):  
Eleni Didaskalou ◽  
Petros Manesiotis ◽  
Dimitrios Georgakellos
Keyword(s):  
Conceptual Framework ◽  
Concept Mapping ◽  
Industry 4.0 ◽  
Concept Maps ◽  
Production Systems ◽  
Software Tool ◽  
Smart Manufacturing ◽  
Future Research ◽  
Key Concepts ◽  
Comprehensive Framework

Engineering concepts usually, are complex concepts, thus many times are difficult for infusing into curriculums or to be comprehensive for practitioners. A concept that still now is not fully understandable is that of Industry 4.0, an approach that increases the complexity of production systems. Nowadays production systems are facing new challenges, as physical productions systems and internet technologies are directly linked, hence increasing the complexity but also the productivity of the systems. The paper introduces an approach of visualizing the concept of smart manufacturing in the context of Industry 4.0, as the term is not clearly specified, although has attracted attention both academicians and businesses. Concept mapping is a method of capturing and visualizing complex ideas. Concept maps are graphical tools for organizing, representing and communicating complex ideas by breaking them into more key concepts. As Industry 4.0 is a factor that can boost innovation and competitiveness of business, all parties involved in shaping the strategy of an organization, should perceive the issues to be covered. Furthermore, learners must be prepared to meet these challenges and knowledgebuilding activities may enhance their process of learning. The paper makes an interesting and valuable contribution, by identifying key concepts within the subject of smart manufacturing and Industry 4.0, using the method of concept mapping. Taking into consideration these concepts a conceptual framework will be introduced, by using the software tool CmapTools. The map can be used as a basis for future research in constructing a more comprehensive framework and identifying the concepts that describe smart manufacturing in the context of Industry 4.0, in a more thorough manner.

scholarly journals Life Cycle Assessment and Environmental Valuation of Biochar Production: Two Case Studies in Belgium

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2166 ◽  
Author(s):  
Sara Rajabi Hamedani ◽  
Tom Kuppens ◽  
Robert Malina ◽  
Enrico Bocci ◽  
Andrea Colantoni ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Production Systems ◽  
Point Of View ◽  
Environmental Benefits ◽  
Pig Manure ◽  
Future Research ◽  
Life Cycle Perspective ◽  
The Impact

It is unclear whether the production of biochar is economically feasible. As a consequence, firms do not often invest in biochar production plants. However, biochar production and application might be desirable from a societal perspective as it might entail net environmental benefits. Hence, the aim of this work has been to assess and monetize the environmental impacts of biochar production systems so that the environmental aspects can be integrated with the economic and social ones later on to quantify the total return for society. Therefore, a life cycle analysis (LCA) has been performed for two potential biochar production systems in Belgium based on two different feedstocks: (i) willow and (ii) pig manure. First, the environmental impacts of the two biochar production systems are assessed from a life cycle perspective, assuming one ton of biochar as the functional unit. Therefore, LCA using SimaPro software has been performed both on the midpoint and endpoint level. Biochar production from willow achieves better results compared to biochar from pig manure for all environmental impact categories considered. In a second step, monetary valuation has been applied to the LCA results in order to weigh environmental benefits against environmental costs using the Ecotax, Ecovalue, and Stepwise approach. Consequently, sensitivity analysis investigates the impact of variation in NPK savings and byproducts of the biochar production process on monetized life cycle assessment results. As a result, it is suggested that biochar production from willow is preferred to biochar production from pig manure from an environmental point of view. In future research, those monetized environmental impacts will be integrated within existing techno-economic models that calculate the financial viability from an investor’s point of view, so that the total return for society can be quantified and the preferred biochar production system from a societal point of view can be identified.

scholarly journals Landfill Gas to Energy: A Demonstration Controlled Environment Agriculture System

HortScience ◽  
2005 ◽  
Vol 40 (2) ◽  
pp. 279-282 ◽  
Author(s):  
Harry Janes ◽  
James Cavazzoni ◽  
Guna Alagappan ◽  
David Specca ◽  
Joseph Willis
Keyword(s):  
Crop Production ◽  
Waste Heat ◽  
Landfill Gas ◽  
Algal Culture ◽  
Controlled Environment ◽  
Successful Implementation ◽  
Fish Feed ◽  
Methanol Production ◽  
Controlled Environment Agriculture ◽  
Turbine Exhaust

A qualitative systems approach to controlled environment agriculture (CEA) is presented by means of several multi-institutional projects integrated into a demonstration greenhouse at the Burlington County Resource Recovery Complex (BCRRC), N.J. The greenhouse has about 0.4 ha of production space, and is located about 800 m from the about 40-ha BCRRC landfill site. A portion of the landfill gas produced from the BCRRC site is used for microturbine electricity generation and for heating the greenhouse. The waste heat from the turbines, which are roughly 15 m from the greenhouse, is used as the main heat source for the greenhouse in the winter months, and to desalinate water when heating is not required. Recovery of this waste heat increases the energy efficiency of the four 30-kW turbines from about 25% to 75%. Within the greenhouse, aquaculture and hydroponic crop production are coupled by recycling the aquaculture effluent as a nutrient source for the plants. Both the sludge resulting from the filtered effluent and the inedible biomass from harvested plants are vermicomposted (i.e., rather than being sent to the landfill), resulting in marketable products such as soil amendments and liquid plant fertilizer. If suitably cleaned of contaminants, the CO2 from the landfill gas may be used to enrich the plant growing area within the greenhouse to increase the yield of the edible products. Landfill gas from the BCRRC site has successfully been processed to recover liquid commercial grade CO2 and contaminant-free methane-CO2, with the potential for this gas mixture to be applied as a feedstock for fuel cells or for methanol production. Carbon dioxide from the turbine exhaust may also be recovered for greenhouse enrichment. Alternatively, algal culture may be used to assimilate CO2 from the turbine exhaust into biomass, which may then be used as a biofuel, or possibly as fish feed, thus making the system more self-contained. By recycling energy and materials, the system described would displace fossil fuel use, mitigating negative environmental impacts such as greenhouse gas emissions, and generate less waste in need of disposal. Successful implementation of the coupled landfill (gas-to-energy · aquaponic · desalination) system would particularly benefit developing regions, such as those of the Greater Caribbean Basin.

scholarly journals Risk of Low Productivity is Dependent on Farm Characteristics: How to Turn Poor Performance into an Advantage

2019 ◽  
Vol 11 (19) ◽  
pp. 5504 ◽  
Author(s):  
Peltonen-Sainio ◽  
Jauhiainen
Keyword(s):  
Crop Production ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Production Systems ◽  
Poor Performance ◽  
Farming System ◽  
Environmental Benefits ◽  
Farm Size ◽  
Production Region ◽  
Farm Type

The principle role of agriculture is to produce food for the increasing human population. However, the environmental footprint needs to be simultaneously reduced. Data from the Finnish Food Authority (181,108 parcels in the south-western crop production region of Finland) were used to identify the farming system, farm type, farm size, field parcel scale, physical parcel characteristics, cultivated crops, crop rotations and cultivars. Sentinel-2 derived Normalized Difference Vegetation Index (NDVI) values were used to identify fields with very low productivity. Thereby, the impacts of farm and field characteristics on risks of low NDVI values and their associated means of coping by the farmer were studied. High variations in field parcel characteristics and growth capacity were typical in the studied area. Although it is challenging for farmers, high variation can provide many opportunities for the development of multifunctional and resource-smart production systems, e.g., by optimizing land use: allocating high-quality fields for food production, and poorly performing fields for extensification, i.e., the production of environmental benefits. Many usable policy instruments are available to support such a transition, but more focus should be put onto the most efficient means to enable progress towards environmentally, economically and socially sustainable high-latitude agricultural systems.

scholarly journals Controlled Environment Agriculture for Effective Plant Production Systems in a Semiarid Greenhouse

2016 ◽  
Vol 50 (2) ◽  
pp. 101-113 ◽  
Author(s):  
Masahisa ISHII ◽  
Sadanori SASE ◽  
Hideki MORIYAMA ◽  
Limi OKUSHIMA ◽  
Atsuo IKEGUCHI ◽  
...  
Keyword(s):  
Production Systems ◽  
Plant Production ◽  
Controlled Environment ◽  
Controlled Environment Agriculture

Integrating crop and livestock production in Inland Northwest farming systems

1996 ◽  
Vol 11 (2-3) ◽  
pp. 121-126 ◽  
Author(s):  
Linda H. Hardesty ◽  
James A. Tiedeman
Keyword(s):  
Crop Production ◽  
Crop Residues ◽  
Production Systems ◽  
Farming Systems ◽  
Livestock Production ◽  
Domestic Demand ◽  
Forage Crops ◽  
Inland Northwest ◽  
Production Cycles ◽  
Crop And Livestock Production

AbstractThe demand for more ecologically and economically sustainable agriculture arises because we currently integrate products economically in a fashion that distorts ecologica I relationships. Earfy farms were ecologically integrated through feeding of forage crops and crop residues to livestock, with livestock contributing draft power and manure for crops. Today we have almost entirely uncoupled plant and animal production, eliminating the contribution that each can make to the productivity of the other. Barriers to integrating farming systems include the large volume of information needed for sophisticated production systems and the lack of infrastructure. Also, many chemicals used on crops have not been evaluated for their safety in food animals. Winter feeding and calving may conflict with crop production cycles; balancing year-round forage supplies is another obstacle. Opportunities include using the Conservation Reserve Program to shift land to livestock production. Domestic demand for meat is changing, and range livestock production is seen by some people as more humane than confinement. Animals fed less grain may be more acceptable in some markets. As agriculture responds to changes in society, ecologica I integration may become more compatible with economic integration.

PARTICIPATORY EVALUATION OF IMPROVED GRASSES AND FORAGE LEGUMES FOR SMALLHOLDER LIVESTOCK PRODUCTION IN CENTRAL AMERICA

2018 ◽  
Vol 55 (5) ◽  
pp. 776-792 ◽  
Author(s):  
EDWIN GARCIA ◽  
PABLO SILES ◽  
LISA EASH ◽  
REIN VAN DER HOEK ◽  
SEAN P. KEARNEY ◽  
...  
Keyword(s):  
Central America ◽  
Management Practices ◽  
Production Systems ◽  
Participatory Evaluation ◽  
Livestock Production ◽  
Environmental Benefits ◽  
Future Research ◽  
Forage Legumes ◽  
Cattle Systems ◽  
Livestock Systems

SUMMARYSmallholder livestock systems in Central America are typically based on pastures with traditional grasses and associated management practices, such as pasture burning and extensive grazing. With the rise of the global population and a corresponding increase in demand for meat and milk production, research efforts have focused on the development of improved grasses and the incorporation of legume species that can increase productivity and sustainability of Central American livestock systems. However, farmer adoption remains very limited, in part due to the lack of site-specific evaluation and recommendations by local institutions. Using a multi-site participatory approach, this study examined the potential of five improved grasses and five species of forage legumes as alternatives to the broadly disseminated grass Hyparrhenia rufa (cv. Jaragua) in pasture-based cattle systems in western Honduras and northern El Salvador. Improved grasses (four Brachiaria sp. and Megathyrsus maximus) produced significantly more biomass than H. rufa; also four of the five legume varieties evaluated (Canavalia ensiformis, Canavalia brasiliensis, Vigna unguiculata, and Vigna radiata) demonstrated high adaptability to diverse environmental conditions across sites. Farmer participatory evaluation offers a valuable means to assess performance of forages and will likely contribute to their improved utilization. Future research is needed on more refined management recommendations, pasture system design, costs and environmental benefits associated with the adoption of these forages in local livestock production systems.

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