Relative increase of livestock production to feed intake and land use. Values scaled to 1961. (a) Total animal production (red line), total crop feed (black line), area in pastures (dotted green) and crop feed surfaces (dotted purple), estimated by method 1. (b) Productivities in protein conversion efficiency (blue line), overall feed yield (red line) and land based efficiency: crop feed area (dotted green) and pastures area (dotted purple).