Fig. 4From: Differences in growth-economics of fast vs. slow growing grass species in response to temperature and nitrogen limitation individually, and in combinationDaily carbon budget. Dry weight-based rates for net photosynthesis, dark respiration and root respiration rates were converted to a per day basis and the daily rates were weighted according to the number of hours that each gas exchange parameter took place (NP:16Â h; DR: 8Â h and RR: 24Â h). The total size of the circle reflects the RGR that is normalized for fast-growing B.hordaceus at control conditions to 100%Back to article page