Category — Soil
The addition of organic fertilizers tended to increase most enzyme activities and available nutrients in the soils, as compared to that of inorganic fertilizers
By Avanthi Deshani Igalavithana, Sang Soo Lee, Nabeel Khan Niazi, Young-Han Lee, Kye Hoon Kim, Jeoung-Hun Park, Deok Hyun Moon, and Yong Sik Ok
Feb 20, 2017
Urban agriculture has been recently highlighted with the increased importance for recreation in modern society; however, soil quality and public health may not be guaranteed because of continuous exposure to various pollutants. The objective of this study was to evaluate the soil quality of urban agriculture by soil microbial assessments. Two independent variables, organic and inorganic fertilizers, were considered. The activities of soil enzymes including dehydrogenase, ?-glucosidase, arylsulfatase, urease, alkaline and acid phosphatases were used as indicators of important microbial mediated functions and the soil chemical properties were measured in the soils applied with organic or inorganic fertilizer for 10 years. Fatty acid methyl ester analysis was applied to determine the soil microbial community composition.
February 25, 2017 Comments Off on Assessment of Soil Health in Urban Agriculture: Soil Enzymes and Microbial Properties
In general, fruit and vegetables produced in city environments contain more undesirable substances than rural produce.
Andrew A. Meharg
Nature: International Weekly Journal of Science
March 16, 2016
Andrew A. Meharg is a plant and soil scientist at Queen’s University Belfast, UK.
It may be possible to build new cities that avoid the current contamination issues. But in existing cities, where urban farming is an afterthought, some lateral thinking is required to give urban agriculture a future. Growing non-food crops such as textile fibre plants, biomass crops and timber would make use of urban and suburban waste land, green the city, recycle waste water and biosolids, and produce crops that currently take up rural land that is ideal for food production.
March 23, 2016 Comments Off on Perspective: City farming needs monitoring
“It is highly unlikely that urban agriculture will increase incidences of elevated blood Pb for children in urban areas. This is due to the high likelihood that agriculture will improve soils in urban areas, resulting in reduced bioavailability of soil Pb and reduced fugitive dust.”
By Michelle Ma
University of Washington
Feb 2, 2016
(Must see. Mike)
Using compost is the single best thing you can do to protect your family from any danger associated with lead in urban soils. Good compost will also guarantee that you will have plenty of vegetables to harvest.
That’s the main finding of a paper appearing this month in the Journal of Environmental Quality. The University of Washington-led study looked at potential risks associated with growing vegetables in urban gardens and determined that the benefits of locally produced vegetables in cities outweigh any risks from gardening in contaminated soils.
February 3, 2016 Comments Off on Risk of lead poisoning from urban gardening is low, new study finds
The producers of this film are allowing a full and FREE viewing of Symphony of the Soil through 12/11/2015.
Winner of the Merit Award for Scientific Information 2012 Montana CINE International Film Festival
Winner Best in Festival of the Life Sciences Film Festival 2012 Czech University of Life Sciences
Winner of the Food Award 2013 Cinema Verde Film Festival
Filmed on four continents, featuring esteemed scientists and working farmers and ranchers, Symphony of the Soil is an intriguing presentation that highlights possibilities of healthy soil creating healthy plants creating healthy humans living on a healthy planet.
December 7, 2015 Comments Off on ‘Symphony of the Soil’ – Watch film free online for a few more days
Universidad Politécnica de Madrid researchers assess potential risk for human health associated with metals in urban gardens
Results show that there exist significant differences in the average total concentration of the elements among the studied urban gardens depending on their localization and previous uses of the soil.
Nov 11, 2015
Researchers from the School of Mining and Energy Engineering at UPM collected samples of arable soil layers of different urban gardens and assessed the metal content and the physicochemical properties of the soil. Most of the risk assessment models are based on the total concentration of pollutants in the environment, but they do not consider that just one part is really absorbed by our organism.
November 19, 2015 Comments Off on Universidad Politécnica de Madrid researchers assess potential risk for human health associated with metals in urban gardens
Our organic veggies could be growing in contaminated soil.
By Katharine Gammon
July 21, 2015
They found that in the majority of examples, eating vegetables grown in the contaminated soils studied was safe. Levels of contaminants in root vegetables, such as carrots, were higher than in tomatoes and collard greens. But the researchers said there was no reason to avoid gardening in city soils, as long as precautions are taken.
“Washing hands thoroughly after gardening, covering pathways with woodchips or gravel, and keeping soil moist during dry and windy conditions to prevent dust generation are all effective preventative measures to ensure safe gardening,” said Ganga Hettiarachchi, a soil chemist at Kansas State University and lead author of the study.
July 28, 2015 Comments Off on Here’s how to keep homegrown food safe
“The main thing to do is remember that soil is alive,” says Lorraine Johnson
By Sarah Elton
Special to The Globe and Mail
May 27, 2015
Michael Levenston, of Vancouver’s City Farmer, the go-to urban agriculture non-profit that runs a compost demonstration garden and teaches gardening skills, believes this recognition can be gained by working in the garden, and composting. “Making soil, that’s really transformative,” he says.
May 28, 2015 Comments Off on The dirt on soil: Keep it healthy for the sake of your veggies
Urban soil farming helping feed more people
By Sarah Elton
CBC News Story
April 3, 2015
At a high school close to downtown Toronto, grade eleven student Deshanel Evans is getting back to the earth.
That is, he’s making the stuff.
As a part-time job, Evans collects kitchen scraps from the school’s culinary program and layers the carrot peelings and apple cores with leaves and other organic material in the bin. Evans then oversees the composting, turning the pile to aerate it and waiting as worms and bacteria transform the food scraps into nutrient-rich soil.
April 4, 2015 Comments Off on 2015 International Year of Soils – FAO
The New York State Department of Health, along with those same soil-researchers at Cornell, put together a list of 10 best practices for healthy gardening in and around contaminated urban soils.
By Liz Core
21 Nov 2014
Vigil told me that the farms have soil tested every year for lead levels, and the results have always come out safe. So when the press started railing against the toxic dangers of his veggies, Vigil was put off (OK, he was royally ticked). He wrote an open letter about what’s really going on and how urban farmers are handling soil toxins. Here’s a taste:
In the past two years we have partnered with the Department of Sanitation to distribute over 5,000 bags of NYC Compost to East New York gardens, and applied over 10 cubic yards of new compost to our farm.
December 11, 2014 Comments Off on Are your urban veggies really toxic?
The impact of soil variables
By Murray B. McBridea, Hannah A. Shaylera, Henry M. Spliethoffb, Rebecca G. Mitchellb, Lydia G. Marquez- Bravob, Gretchen S. Ferenzc, Jonathan M. Russell-Anellia, Linda Caseyc, and Sharon Bachmand
Published in Environmental Pollution – August 2014
Paired vegetable/soil samples from New York City and Buffalo, NY, gardens were analyzed for lead (Pb), cadmium (Cd) and barium (Ba). Vegetable aluminum (Al) was measured to assess soil adherence. Soil and vegetable metal concentrations did not correlate; vegetable concentrations varied by crop type. Pb was below health-based guidance values (EU standards) in virtually all fruits.
December 11, 2014 Comments Off on Research Paper: Concentrations of lead, cadmium and barium in urban garden-grown vegetables
16 Oaks Community Garden in Vancouver. A recent study detected metal contamination associated with high traffic ares in the soil. Photograph by: Arlen Redekop.
Soil research suggests study required before growing food on land near busy transportation corridors
By Randy Shore,
December 2, 2014
An eight-month study of Vancouver garden and agricultural soils has found levels of lead and other metals above the most stringent Canadian standards for human health.
Samples taken from the 16 Oaks community garden averaged 219 parts per million of lead, which exceeds the standard of 70 to 140 ppm for agricultural, residential and park land set by the Canadian Council of Environment Ministers.
December 2, 2014 Comments Off on Metal contamination found in Vancouver community garden, brownfield sites
Extols the Importance and Mystery of Soil
By Dr. Mercola
Oct 1, 2014
One of Earth’s greatest treasures is soil, without which we could not survive. Soil is the mother of nearly all plant life, and ultimately, all animal life on this planet. It’s the interface between biology and geology—the living skin of the earth.
A new documentary, “Symphony of the Soil,” extols the importance and mystery of soil, as discussed by some of the world’s most esteemed scientists, farmers, and activists.1 This visually stunning film reveals how the future of humankind largely depends on how well we care for this vital natural resource.
October 7, 2014 Comments Off on Documentary ‘Symphony of the Soil’ online until October 10
Brisbane City Council has closed the Northey Street City Farm ahead of its huge Winter Solstice celebrations on Saturday after finding asbestos.
The Australian News
June 20, 2014
Mr Copeman said without prior notice, council shut down 3.5 acres of the site with fencing after the discovery of demolition waste, including asbestos and possibly heavy metals.
The discovery was made during a BCC inspection related to an approved development of a picnic shed on the site; Mr Copeman said NSCF was cooperating with BCC in the investigation and management of the demolition waste.
June 30, 2014 Comments Off on Asbestos discovery at Northey Street City Farm, Brisbane, Australia
Urban cultivation in allotments maintains soil qualities adversely affected by conventional agriculture
Typical urban soils are shown to be comparable to semi-natural ecosystems and of considerably better quality than agricultural soils, and this is maintained under cultivation in allotments, which receive regular organic inputs from manures and composts.
By Jill L. Edmondson1,*, Zoe G. Davies2, Kevin J. Gaston3 andJonathan R. Leake1
Journal of Applied Ecology
Article first published online: 24 Apr 2014
This research demonstrates that own-growing in urban allotments, in contrast to arable crop production, does not trade off the soil quality measures that are positively associated with regulating and supporting ecosystem services, in order to deliver provisioning ecosystem services. Typical urban soils are shown to be comparable to semi-natural ecosystems and of considerably better quality than agricultural soils, and this is maintained under cultivation in allotments, which receive regular organic inputs from manures and composts. Allotment cultivation may provide a model for understanding management systems for sustainably delivering multiple ecosystem services without the provision of one type of service compromising the delivery of another. Further work is now required to quantify the ecosystem services provided by allotments, the potential and actual yield of crops in urban environments, and the area currently under cultivation. For urban allotment cultivation to be more sustainable, efforts should be made to replace OM and nutrient inputs derived directly from agriculture with those derived from composting putrescible wastes in cities. Our findings lend additional support to the view that own-growing provides multiple human and environmental benefits and has a role to play in more sustainable living in urban areas.
June 11, 2014 Comments Off on Urban cultivation in allotments maintains soil qualities adversely affected by conventional agriculture
In New York City, there are more than 700 community gardens and urban farms.
By Vinnie Mancuso
New York Observer
Bad news for people who like to support their local community gardens when shopping for their vegetables. Good news for people who love ingesting arsenic and lead with their vegetables.
The New York Post reports that a study on soil contamination by the state Center for Environmental Health found toxic soil at 70 percent of New York’s gardens. A shocking 44 percent of the total gardens had lead levels above federal guidelines.
A Freedom of Information Law request by the Post revealed the exact names and locations those gardens most contaminated. Brooklyn did not come out looking so hot.
May 13, 2014 Comments Off on Concerns about toxic soils in New York’s Community Gardens