agriculatural
Maybe it is needed to add the "industrial" adjective here, because I think that methane emissions are correlated here with the decreasing rate of grazing in bovine battery.
CH4 emissions are less in a "agro-sylvo-pastoral" equilibrium case. Wish to find a good reference for that... maybe that one? https://www.ncbi.nlm.nih.gov/pubmed/12549566