Blanca Arce and Andrés Peña

In: UA Magazine no 23 - Urban nutrient management, pp. 29-30

There is a need for low-cost, locally produced substrates for urban agricultural production in Bogotá, Colombia. The Colombian Agricultural Research Corporation (CORPOICA) coordinates participatory research on substrate mixtures using a wide variety of low-cost organic materials.

Sohal Behmanesh

In: UA Magazine no 23 - Urban nutrient management, pp. 27-28

The disposal of waste presents an increasing challenge to the administrative bodies of megacities. The Municipal Corporation of the Indian city Pune has introduced source separation systems and onsite organic waste composting. The citizens concerned are looking for practical ways to treat their organic wastes and they have found city farming to be a viable solution.

Bolanle Wahab, M.K.C. Sridhar and A.A. Ayorinde

In: UA Magazine no 23 - Urban nutrient management, pp. 25-26

Solid waste disposal is a nagging problem faced by various communities in Ibadan in southwest Nigeria and other state capitals. Ibadan, the capital of Oyo State, is the most densely populated city in the state with over three million inhabitants. It is said that in Ibadan every street is a market. Many backyards are used for growing local vegetables and medicinal herbs.

Bruno Martins Dala Paula, Ivana Cristina Lovo, José Divino Lopes Filho

In: UA Magazine no 23 - Urban nutrient management, pp. 22-24

As part of the RUAF’s Cities Farming for the Future programme (1), a project called the Jardim Produtivo (Productive Garden) was initiated to transform a vacant plot(2) of 3,500 m2 into a multifunctional urban space.

Roland Linzner

In: UA Magazine no 23 - Urban nutrient management, pp. 20-21

It is estimated that two out of three people will live in urban centres in West Africa within the next 20 years. According to UNOWA (2007) more than ninety per cent of the urban population lives under substandard conditions. An important issue is the management of urban solid organic waste. Currently, these wastes contribute to urban pollution, while large amounts of nutrients are lost.

Diana Lee-Smith, Nancy Karanja, Mary Njenga, Thomas Dongmo and Gordon Prain

In: UA Magazine no 23 - Urban nutrient management, pp. 17-19

Dionys Forster, Harald Menzi, Roland Schertenleib and Bernd Lennartz

In: UA Magazine no 23 - Urban nutrient management, pp. 15-16

To identify the potential for organic waste reuse for agricultural production in and around a city, in socalled “spatially explicit scenarios of re-use”, it is necessary to analyse existing patterns of nutrient management. These management patterns are mainly influenced by the type of crops cultivated, the distance between the field and the farmer’s homestead and the perceived soil fertility.

Agnès Montangero

In: UA Magazine no 23 - Urban nutrient management, pp. 13-14

In Hanoi, Vietnam, water bodies are polluted by high levels of nutrients, which are discharged in wastewater. At the same time, farmers in and around the city use artificial fertilisers. A nutrient accounting tool indicates where to set priorities to enhance nutrient recovery, and in this way reduce water pollution and the mining of limited phosphorus
reserves. The analysis in this article focuses on phosphorus.

Pay Drechsel and Marco Erni

In: UA Magazine no 23 - Urban nutrient management, pp. 11-12

To better understand the linkage between sanitation and agriculture at municipal scale, a study was carried out that addressed the following research questions:
- How does a larger investment in flush toilets affect water quality and urban farmers?
- How much of the nutrient demand of urban farmers could be covered through waste composting?

Pay Drechsel, Olufunke Cofie and George Danso

In: UA Magazine no 23 - Urban nutrient management, pp. 8-10