I am an expert in the development of sustainable farming in arable and vegetable production with focus on soil, water and fertilizer management. My drive is to achieve practical and sustainable solutions for and with entrepreneurs: solutions that are both good for business (sufficient income and farm subsistance) and for society (such as reduced emissions and the use of finite resources). Cooperation with entrepreneurs and other stakeholders is essential in this.
I am working on a wide range of solutions: I am working on highly technological solutions as soilless cultivation in which I act as program manager of the research program in this area. I have worked on the possibilities of fertigation in vegetable crops. Currently I am working on more ecological solutions such as improved soil management with a focus on organic matter, tillage and fertilization. I am project leader of two farming system projects in the field of soil management: Soil Quality on Sandy Soils and Soil Quality Veenkolonien. In these projects, several measures are combined in a crop rotation in order to achieve better soil and crop production with reduced emissions from fertilizers.
I am also secretary of the Standing Commission on Fertilisation in Arable Crops and Field vegetables, which determines soil and fertilizer recommendations in the Netherlands and publishes the Manual Soil & Fertilizer management. Janjo has international expertise in EU projects in the EU's focus groups (Fertilizer Efficiency in Horticulture and Water and Agriculture) and as a coordinator of the ISHS workgroup Vegetable Nutrition and Fertilization and the EUVRIN workgroup Fertilization and Irrigation.