> Low values of embodied crop calories are related to production systems for ruminants based on fodder and forage, while large values are usually associated with production systems for non-ruminants fed on crop products.
Cows are ruminants.
> First, we estimated country-wise feed requirements. We calculated feed required per grid cell for each livestock types in ton per year multiplying regional and livestock-wise daily feed requirements (Haberl et al 2007) with the gridded livestock counts.
Honestly, I'm not very interested in their results after reading this. If they're just estimating based on number of livestock x calories required for livestock along with a bucket of crop yields for an area then this is just paper shuffling. You'll have my attention when you get real numbers directly from the farmers themselves rather than just aggregating 3rd hand information over a grid area.
Cows are ruminants.
> First, we estimated country-wise feed requirements. We calculated feed required per grid cell for each livestock types in ton per year multiplying regional and livestock-wise daily feed requirements (Haberl et al 2007) with the gridded livestock counts.
Honestly, I'm not very interested in their results after reading this. If they're just estimating based on number of livestock x calories required for livestock along with a bucket of crop yields for an area then this is just paper shuffling. You'll have my attention when you get real numbers directly from the farmers themselves rather than just aggregating 3rd hand information over a grid area.
https://iopscience.iop.org/article/10.1088/1748-9326/8/4/044...