Soil Trust Yuen Long Compost

Material categories:

Soil / Soil based (organic/mineral)

Plant / Plant based

Identification number:


Sample produced by:


Sample date:

14 Apr 2023 (Received)

Sample condition:


Source-driven material

This compost sample is from Soil Trust's test plot in Yuen Long. It is a mixture of decaying organic matter, bokashi and soil that has been mixed and monitored in the raised compost beds. The temperature of the compost beds are monitored as high temperatures indicate that decomposition is occurring, however too high of temperatures can kill helpful microbes and result in a halt in the composting process. Unfortunately the program has been closed as of May 2023, but if you would like to learn more about local, traditional agricultural and soil amendment practices, as well as plant-soil-human interactions please visit their website:

Soil Trust summarizes "Responding to the absence of household-level organic waste recovery in Hong Kong, Soil Trust (泥玩 :集「棄」還田) is building a soil commons — a community of flourishing — around recovering food scraps that brings food consumers and producers together for mutually invigorating local soils. Particular attention is paid to the processes involved to make grassroots nutrient cycling desirable for urban households without land access. The aim of Soil Trust is to (1) make food scrap cycling an integral part in Community-Supported Agriculture (CSA) for strengthening producer-consumer relations, (2) stimulate eco-farm practice innovation towards probiotic soil regeneration, and (3) demonstrate the importance of a vibrant, localised First Sector in Hong Kong for resource recovery as well as climate change mitigation.

For exploring bokashi fermentation as metabolic link between urban households and local production farms, Soil Trust established since autumn 2021 a field trial inside the Hong Miu Organic Farm (康苗有機農場) with 17 member households of the community-supported agriculture (CSA) platform TinYeah (回歸). At the bi-weekly Farm Care Mornings, the families are invited to produce their bokashi bedding, tend to compost, mulch the soil, and raise the vegetables grown out of it. At their homes, families source-separate, collect, and bokashi-ferment their kitchen scraps, as well as self-document their experience. Families unable to attend Farm Care Mornings send their bokashi-filled bins and receive empty bins as well as bedding supply through the CSA’s weekly vegetable delivery system. The Soil Trust team with the support from the Research Institute for Future Food (香港理大未來食品研究院) provides the necessary know-how transfer, scientific validation, social arena, and material supplies for orchestrating this native bokashi collective."

Location of Sample Extraction:

Yuen Long, Hong Kong

22.446881, 114.068826

Surface Condition:


Depth of sample extraction:

On/Above Ground

Slope at extraction point:

< 35°

Land Use:

Agricultural land




5YR 2.5/1

Soil Structure

Organic Matter: 99.0 %

Coarse: 0.0 %

Sand: 0.0 %

Silt: 0.0 %

Clay: 0.0 %

Production Attribute

Distance from source location: <= 100km

Production Energy: Low

Water Footprint for Production: Low

Collatoral Pollution:Low

CO2 Footprint: Low

Ecological Attributes

Recycling Percentage: 100%

Reclaimed Components: 100%

Sensory Attributes

Odour: Strong