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Urban agriculture: cultivating soils in the city

Posted by BigHaat India on

The rapid growth of cities in the developing world is placing enormous demands on urban food supply systems.

With most living in urban areas, agriculture is increasingly spreading to towns and cities and an increasing number of people are engaging in urban agriculture globally. Urban and peri-urban agriculture (or UPA) can provide fresh food, generate employment, recycle urban wastes, create greenbelts and strengthen cities’ resilience to climate change. Notably, UPA is also having a positive impact on urban soils.

How horticulture and community gardening help grow nutritious food for city dwellers and restore soils in urban areas

It is widely known that soils and vegetation have a reciprocal relationship. Fertile soil encourages plant growth by providing plants with nutrients, acting as a water holding tank, and serving as the substrate to which plants anchor their roots. In return, vegetation prevents soil degradation by stabilizing the soil, maintaining water and nutrient cycling, and reducing water and wind erosion.

In order to ensure healthy food and plants, urban gardeners and farmers must first ensure a healthy soil, making sure that there are no contaminants in the soil or water being used. 

By converting vacant lots to productive, well-managed community gardens, degraded soil is restored and safeguarded for the production of food and the creation of green belts in urban areas.  Restoring soil quality and fertility also yields benefits such as increased carbon sequestration, reduced storm water runoff and improved water-holding capacity.

It is estimatd that garden plots can be up to 15 times more productive than rural holdings. An area of just one square metre can provide 20 kg of food a year.

The intensive cultivation of a wide range of vegetables, roots and tubers, and herbs in small spaces, known as micro-gardening, is sustainable and highly productive and can be easily managed by anyone. FAO studies show that a micro-garden of one square metre can produce any one of the following:

•          Around 200 tomatoes (30 kg) a year

•          36 heads of lettuce every 60 days

•          10 cabbages every 90 days

•          100 onions every 120 days

From the soil up

Good agricultural practices and sustainable soil management are central to ensuring that urban and peri-urban horticulture (or UPH) is environmentally sustainable and that the produce grown is of high quality.

Ensuring product quality while protecting the environment is crucial to FAO's approach. This is directly linked to soils. FAO uses Farmer Field Schools to promote intensification and diversification of horticultural production. Field schools introduce small-scale growers to Integrated Production and Protection Management (which reduces the use of toxic chemicals to control pests and diseases), and to improved cultivars and cropping practices adapted to local conditions.

By fostering good agricultural practices, field schools help to build sustainable production systems that are environmentally friendly and ensure the safety and quality of produce. FAO projects encourage the use of organic compost in urban environments and train vegetable growers in the safe recycling of wastewater for irrigation. All of these practices impact directly on urban soils, restoring them and safeguarding them for future generations. 

How can I help?

You can help by preserving and increasing vegetation in your garden, basically plant more! Get people involved by starting a community garden. Always practice sustainable soil management like composting, which enhances overall soil health; and finally, spread the word about soils and raise awareness for this silent ally. 

 

Source:

http://www.fao.org/soils-2015/news/news-detail/en/c/329009/


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