We are no longer updating the Research Digest. All content remains.
The Permaculture Research Digest has summaries of newly published permaculture-related research. All items are
hyper-linked to the original publication.
The 'January 2013' archive contains 60 items published in 2012.
Items marked with a # have restricted public access, although abstracts are freely available.
Permaculture Research Digest
▼
Tuesday 30 September 2014
Difference and inequality in alternative food (book)
Savoring Alternative Food: School Gardens, Healthy Eating and Visceral Difference
Advocates of the alternative food movement often insist that food is our "common ground" – that through the very basic human need to eat, we all become entwined in a network of mutual solidarity. In this challenging book, the author explores the contradictions of alternative food activism by examining the movement through various lenses of social difference – including class, race, gender, and age. While the solidarity adage has inspired many, it has also had the unfortunate effect of promoting sameness over difference, eschewing inequities in an effort to focus on being "together at the table". The author explores questions of who belongs at the table of alternative food, and who gets to decide what is eaten there. Case studies are presented from school gardens and slow food movements in Berkeley, California and rural Nova Scotia.Intro to the green economy (book)
An Introduction to the Green Economy: Science, Systems and Sustainability
This textbook provides a comprehensive introduction to the green economy, using a strongly interdisciplinary approach based on environmental science, rather than treating it as a sub-set of economics. The scientific principles of sustainability are presented, which provide the foundations of the green economy, with a particular focus on systems-based approaches. Examples of real-world case studies are used to illustrate how the green economy can be achieved in practice, drawing from a wide range of disciplines including ecology, geography, social science, psychology, sustainability science, environmental science, law and economics.Half the world's animals lost since 1970 (report)
The Living Planet Report 2014
This latest edition of the Living Planet Report is not for the faint-hearted. The Living Planet Index (LPI), which measures more than 10,000 representative populations of mammals, birds, reptiles, amphibians and fish, has declined by 52 per cent since 1970. Put another way, in less than two human generations, population sizes of vertebrate species have dropped by half. We are using nature’s gifts as if we had more than just one Earth at our disposal. By taking more from our ecosystems and natural processes than can be replenished, we are jeopardizing our very future. Nature conservation and sustainable development go hand-in-hand. They are not only about preserving biodiversity and wild places, but just as much about safeguarding the future of humanity – our well-being, economy, food security and social stability – indeed, our very survival.The 13 greatest weeds (book)
The Wild Wisdom of Weeds 13 Essential Plants for Human Survival
Farming the woods (book)
Europe's vegetation cover mapped (#journal)
Semi-natural vegetation in agricultural land: European map and links to ecosystem service supply
Semi-natural vegetation in agricultural land includes extensively
managed grassland, agro-forestry and vegetated features not used for crop production, such as hedgerows and woodlots. Semi-natural vegetation plays a major role
in the supply of ecosystem services such as pollination, pest control,
water quality control and erosion prevention. In spite of such a
relevance, semi-natural vegetation in agricultural land has never been
mapped at the European scale. This article presents the first 1- km
resolution map of semi-natural vegetation in agricultural land in the EU. Results show that semi-natural
vegetation is usually beneficial for regulating services, whereas the
relation to provisioning services is context-dependent. The study supports greening measures in the Common
Agricultural Policy. Results also will help to identify
green infrastructure elements and priority areas for ecological
restoration.
Reduced tillage in organic farming (#journal)
Long-term feasibility of reduced tillage in organic farming
Soil tillage emits greenhouse gases, so reducing tillage could both reduce greenhouse emissions and improve soil quality. In Europe about 25 % of arable land is managed under reduced tillage, but a major drawback for organic farmers is the increase in weed infestation. This study compared reduced tillage and conventional tillage in a 2002–2011 field experiment in Switzerland. Weed abundance was 2.3 times higher under reduced tillage, however yields were similar for reduced tillage and conventional tillage. This study represents the first long-term trial under organic management showing that reduced tillage improves environmental performance.
Weeds and climate change (journal)
Impact of climate change on weeds in agriculture: a review
Climate change has induced transformations in the weed flora of arable ecosystems in Europe. The authors review the mechanisms of responses of arable weeds to climate change. Climate change effects are categorized into three distinct types of shifts: (1) range shifts at the landscape scale, (2) niche shifts at the community scale, and (3) trait shifts of individual species at the population scale. The main conclusions are changes in the species composition and new species introductions are favored, with major ecological and agronomical implications. Current research mainly considers processes at the landscape scale, but processes at the population and community scales have prevalent importance to devise sustainable management strategies.
Coffee polycultures minimise carbon footprint (#journal)
Carbon footprints and carbon stocks reveal climate-friendly coffee production
Two aspects of the climate impact of coffee production were studied: the standing carbon stocks in the production systems and the product carbon footprint. We collected data from 116 coffee farms in five Latin American countries for four coffee production systems: (1) traditional polycultures, (2) commercial polycultures, (3) shaded monocultures, and (4) unshaded monocultures. Polycultures were found to have a lower mean carbon footprint and much higher carbon stocks in the vegetation than monocultures. Several other strategies were identified to reduce climate impacts of coffee production, including diversification with trees, use of their wood to substitute for fossil fuel and building materials, targeted use of fertilizer, and use of ecological processing instead of the traditional fully washed process.Manure for rice production (#journal)
Increase of available soil silicon by Si-rich manure for sustainable rice production
Depletion of bio-available silicon, Si, in paddy soils can decrease the yields of rice. A potential solution is to amend soil with Si-rich organic wastes such as manure from animals fed with rice crop residues. Here, we studied Si in soils from 2000 to 2010 field experiments in Eastern China. Results showed that available Si in soils doubled, either as a direct input of available Si or due to Si produced by mineralization of Si minerals. These results show that amending soil with Si-rich manure in the long term is a solution for sustainable rice production.Organic control of strawberry diseases (#journal)
Soil biosolarization for sustainable strawberry production
Strawberry diseases are commonly controlled by soil fumigation with toxic chemicals. However, we have tested soil biosolarization, a new technique combining soil biofumigation and soil solarization, to cultivate the Camarosa strawberry in southwestern Spain. Soil was biofumigated by amendment of fresh chicken manure at 12,500 kg/ha; chicken manure at 25,000 kg/ha; Brassica juncea pellets at 2,000 kg/ha; sugar beet vinasse at 15,000 kg/ha; or dried olive pomace at 12,500 kg/ha. Soil was then solarized for 30 days by covering with a clear plastic mulch. The highest yield averaging 70,543 kg/ha and the lowest percentage of 12.6 % of second-class fruits were obtained by amendment of fresh chicken manure. Yields were similar to yields reported for chemical fumigation. In addition, biosolarization is about 20 % cheaper than chemical treatment.Monday 29 September 2014
Sustainable food sytems in Queensland (#journal)
Sustainable Food Systems in Northern Queensland
This paper explores the development of sustainable food systems in Northern Queensland and draws conclusions as to how they can grow and become more stable in the future. It shows how a community is actively and creatively deploying local networks and local resources in order to gain access to locally-grown, sustainable food. The development of this alternative agri-food network (AAFN) is driven by grassroots movements. The opportunities and challenges faced by actors in alternative food systems are discussed. At federal government level, the adoption of intensive, productivist-based agriculture runs counter to the philosophy of AAFNs, so how can local communities influence food and agricultural policy?Emily Floyd's permaculutre art (#journal)
Emily Floyd: In the knowledge garden
Art Monthly Australia April 2014
Gardening
is perhaps the most cultured activity in which most people participate.
It is constructed, dismantled, renewed constantly and often in front of
our eyes. Through understanding gardening - and I use that term to
encompass agriculture as well as the humble garden bed - we gain a
greater understanding of our society and community.
Integrated Forest Gardening: The Complete Guide to Polycultures and Plant Guilds in Permaculture Systems
The first, and most comprehensive, book about plant guilds, covering in detail both what guilds are and how to design and construct them, complete with extensive colour photography and design illustrations. The guild concept is one of a “functional relationship” between plants. In other words, it is the integration of species that creates a balanced, healthy, and thriving ecosystem. A guild is also a metaphor for all walks of life, including a group of people working together to craft works of balance, beauty, and utility. This book will benefit readers from permaculture designers to backyard growers.
Permaculture
is a movement that is coming into its own, and the concept of creating
plant guilds is increasingly at the forefront of every farmer’s and
gardener’s permaculture practice.
Authors Wayne Weiseman, Daniel Halsey, and Bryce Ruddock have created the first, and most comprehensive, book about plant guilds, covering in detail both what guilds are and how to design and construct them, complete with extensive color photography and design illustrations. While other permaculture books address this topic of guilds, none provides enough depth to be replicable in a serious way.
Though detailed, Integrated Forest Gardening will benefit readers of any scale, from permaculture designers and professional growers to backyard growers new to the concept of permaculture.
One of the essential practices of permaculture is to develop perennial agricultural systems that thrive over several decades without expensive and harmful inputs. Those systems include perennial-plant guilds, food forests, agroforestry, and mixed animal-and woody-species polycultures.
The guild concept often used is one of a “functional relationship” between plants. In other words, it is the integration of species that creates a balanced, healthy, and thriving ecosystem. But it goes beyond integration. A guild is a metaphor for all walks of life, most importantly, a group of people working together to craft works of balance, beauty, and utility.
- See more at: http://www.chelseagreen.com/bookstore/item/integrated_forest_gardening:paperback#sthash.G3lw9Pok.dpuf
Authors Wayne Weiseman, Daniel Halsey, and Bryce Ruddock have created the first, and most comprehensive, book about plant guilds, covering in detail both what guilds are and how to design and construct them, complete with extensive color photography and design illustrations. While other permaculture books address this topic of guilds, none provides enough depth to be replicable in a serious way.
Though detailed, Integrated Forest Gardening will benefit readers of any scale, from permaculture designers and professional growers to backyard growers new to the concept of permaculture.
One of the essential practices of permaculture is to develop perennial agricultural systems that thrive over several decades without expensive and harmful inputs. Those systems include perennial-plant guilds, food forests, agroforestry, and mixed animal-and woody-species polycultures.
The guild concept often used is one of a “functional relationship” between plants. In other words, it is the integration of species that creates a balanced, healthy, and thriving ecosystem. But it goes beyond integration. A guild is a metaphor for all walks of life, most importantly, a group of people working together to craft works of balance, beauty, and utility.
- See more at: http://www.chelseagreen.com/bookstore/item/integrated_forest_gardening:paperback#sthash.G3lw9Pok.dpuf
Permaculture
is a movement that is coming into its own, and the concept of creating
plant guilds is increasingly at the forefront of every farmer’s and
gardener’s permaculture practice.
Authors Wayne Weiseman, Daniel Halsey, and Bryce Ruddock have created the first, and most comprehensive, book about plant guilds, covering in detail both what guilds are and how to design and construct them, complete with extensive color photography and design illustrations. While other permaculture books address this topic of guilds, none provides enough depth to be replicable in a serious way.
Though detailed, Integrated Forest Gardening will benefit readers of any scale, from permaculture designers and professional growers to backyard growers new to the concept of permaculture.
One of the essential practices of permaculture is to develop perennial agricultural systems that thrive over several decades without expensive and harmful inputs. Those systems include perennial-plant guilds, food forests, agroforestry, and mixed animal-and woody-species polycultures.
The guild concept often used is one of a “functional relationship” between plants. In other words, it is the integration of species that creates a balanced, healthy, and thriving ecosystem. But it goes beyond integration. A guild is a metaphor for all walks of life, most importantly, a group of people working together to craft works of balance, beauty, and utility.
- See more at: http://www.chelseagreen.com/bookstore/item/integrated_forest_gardening:paperback#sthash.G3lw9Pok.dpuf
Authors Wayne Weiseman, Daniel Halsey, and Bryce Ruddock have created the first, and most comprehensive, book about plant guilds, covering in detail both what guilds are and how to design and construct them, complete with extensive color photography and design illustrations. While other permaculture books address this topic of guilds, none provides enough depth to be replicable in a serious way.
Though detailed, Integrated Forest Gardening will benefit readers of any scale, from permaculture designers and professional growers to backyard growers new to the concept of permaculture.
One of the essential practices of permaculture is to develop perennial agricultural systems that thrive over several decades without expensive and harmful inputs. Those systems include perennial-plant guilds, food forests, agroforestry, and mixed animal-and woody-species polycultures.
The guild concept often used is one of a “functional relationship” between plants. In other words, it is the integration of species that creates a balanced, healthy, and thriving ecosystem. But it goes beyond integration. A guild is a metaphor for all walks of life, most importantly, a group of people working together to craft works of balance, beauty, and utility.
- See more at: http://www.chelseagreen.com/bookstore/item/integrated_forest_gardening:paperback#sthash.G3lw9Pok.dpuf
Permaculture
is a movement that is coming into its own, and the concept of creating
plant guilds is increasingly at the forefront of every farmer’s and
gardener’s permaculture practice.
Authors Wayne Weiseman, Daniel Halsey, and Bryce Ruddock have created the first, and most comprehensive, book about plant guilds, covering in detail both what guilds are and how to design and construct them, complete with extensive color photography and design illustrations. While other permaculture books address this topic of guilds, none provides enough depth to be replicable in a serious way.
Though detailed, Integrated Forest Gardening will benefit readers of any scale, from permaculture designers and professional growers to backyard growers new to the concept of permaculture.
One of the essential practices of permaculture is to develop perennial agricultural systems that thrive over several decades without expensive and harmful inputs. Those systems include perennial-plant guilds, food forests, agroforestry, and mixed animal-and woody-species polycultures.
The guild concept often used is one of a “functional relationship” between plants. In other words, it is the integration of species that creates a balanced, healthy, and thriving ecosystem. But it goes beyond integration. A guild is a metaphor for all walks of life, most importantly, a group of people working together to craft works of balance, beauty, and utility.
- See more at: http://www.chelseagreen.com/bookstore/item/integrated_forest_gardening:paperback#sthash.G3lw9Pok.dpuf
Authors Wayne Weiseman, Daniel Halsey, and Bryce Ruddock have created the first, and most comprehensive, book about plant guilds, covering in detail both what guilds are and how to design and construct them, complete with extensive color photography and design illustrations. While other permaculture books address this topic of guilds, none provides enough depth to be replicable in a serious way.
Though detailed, Integrated Forest Gardening will benefit readers of any scale, from permaculture designers and professional growers to backyard growers new to the concept of permaculture.
One of the essential practices of permaculture is to develop perennial agricultural systems that thrive over several decades without expensive and harmful inputs. Those systems include perennial-plant guilds, food forests, agroforestry, and mixed animal-and woody-species polycultures.
The guild concept often used is one of a “functional relationship” between plants. In other words, it is the integration of species that creates a balanced, healthy, and thriving ecosystem. But it goes beyond integration. A guild is a metaphor for all walks of life, most importantly, a group of people working together to craft works of balance, beauty, and utility.
- See more at: http://www.chelseagreen.com/bookstore/item/integrated_forest_gardening:paperback#sthash.G3lw9Pok.dpuf
Agro-ecology and climate change (online)
Diversity in organic and agroecological farming systems for mitigation of climate change impact, with examples from Latin America.
Chapter five in this book (free to download) considers the three-fold role of agro-ecology in addressing climate change: reducing emissions, mitigating impacts, and providing food security. Case studies are provided from Latin America.
Wednesday 24 September 2014
FAO advocates perennial grains (report)
Perennial Crops for Food Security: Proceedings of the FAO expert workshop
In the past few years the potential benefits of developing perennial grain-based cropping systems has become widely acknowledged. Much attention has been focused on the ecological benefits that communities of perennial plants can confer on a landscape: erosion prevention, efficient capture and use of water and nutrients, protection of water resources, carbon sequestration, and maintenance of thriving soil ecosystems. There is also growing recognition of the potential benefits for smallholder farmers: reduced expenditure for seed, fertilizer, and other inputs; more reliable stand establishment and early vigour; less effort expended on weed control; extended growing seasons; less transplanting; and protection of biodiversity. Perhaps the most important benefit of perennial agriculture will be the protection and development of healthy soil ecosystems that can ensure food security over the long term.Intensification won't feed Africa (journal)
When yield gaps are poverty traps: The paradigm of ecological intensification in African smallholder agriculture
Yield gaps are pervasive in African smallholder agriculture, and are large for almost all crops in all regions. Poor soil fertility and nutrient availability are the major biophysical limitations to agricultural production in the continent. Estimates of yield gaps are given for major crops, together with a framework for how yield gaps can be estimated. The paradigm of ecological intensification which focuses on yield potential, soil quality and precision agriculture is explored. Our analysis suggests that smallholder farmers are unable to benefit from yield gains offered by plant genetic improvement, while continued cropping without sufficient inputs of nutrients and organic matter leads to soil degradation. This necessitates a rethink for development policy.
Yield gaps are pervasive in African smallholder agriculture, and are large for almost all crops in all regions. Poor soil fertility and nutrient availability are the major biophysical limitations to agricultural production in the continent. Estimates of yield gaps are given for major crops, together with a framework for how yield gaps can be estimated. The paradigm of ecological intensification which focuses on yield potential, soil quality and precision agriculture is explored. Our analysis suggests that smallholder farmers are unable to benefit from yield gains offered by plant genetic improvement, while continued cropping without sufficient inputs of nutrients and organic matter leads to soil degradation. This necessitates a rethink for development policy.