Conflagration
发表于 2025-4-1 04:15:40
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