Back to profile Projects - dr.ir. JA (Jelle) Hiemstra Projects by JA Hiemstra End user plays decisive role when developing and distributing new crop protection agents against diseases and pests Fruit researchers from Wageningen University & Research (WUR) are taking part in the European ‘EMPHASIS’ project. The purpose of... Evaluation of the ecosystem services of roof- and facade green What is the (potential) impact on district/city level? Literature studies indicate that green roofs and walls have many beneficial effects on cities,...