Demo trial with different composts in tree nursery

15 April 2020 - Published by Hanne Lakkenborg Kristensen
Last week, Delphy started a demo trial at her Research Nursery using different composts and other organic materials. The demo is part of the European Interreg-project Soilcom.

In this project, several partners from the North Sea region are working together to improve the soil quality by applying specific composts.

In the Netherlands, Delphy will set up study groups with growers to share knowledge about composts. Compost trials will show the effects and benefits of compost use.

In the trial various composts are applied on top of the soil in a field of Boxwood.  Boxwood is a fast growing crop with a high nutrient requirement, sensitive roots and shallow rooting. It concerns a total of 9 different treatments. Some composts are mixed with other organic materials, both stable organic materials like cocoa shells and less stable materials of for example straw. In one of the treatments we also mixed iron sludge with compost. With the idea of ​​lowering the phosphate availability.

During cultivation, growth is monitored and various analyzes are taken to monitor effects on nutrient content of the soil and soil life. With the compost trial Delphy aims to have more insight into the combination of specific compost application and different soil condtions.