Abstract
Pastures and grasslands are important part of the pre-Alpine and Alpine landscape ranging from intensive grasslands in the lover regions to highly diverse seasonal mountain pastures and specialized natural ecosystems. Economic value and significant role of vegetation in grassland C and N cycling but spatially explicit information on grassland management and yields are rarely available. Here we analyse the potential to map biomass and plant N content with two different UAS based multispectral sensors and compare three statistical modelling approaches.