Titlebook: Long Term Socio-Ecological Research; Studies in Society-N Simron Jit Singh,Helmut Haberl,Martin Schmid Book 2013 Springer Science+Business

Conflagration

Sustaining Agricultural Systems in the Old and New Worlds: A Long-Term Socio-Ecological Comparisonons, but they produced little marketable surplus. A key difference was livestock density. Old World communities kept more animals than needed for food and labour to supply manure that maintained cropland fertility. Great Plains farmers used few animals to exploit rich grassland soils, returning less