ਖੇਤੀਬਾੜੀ: ਰੀਵਿਜ਼ਨਾਂ ਵਿਚ ਫ਼ਰਕ

| style="text-align:left;" | ਯੂਨਾਈਟਿਡ ਸਟੇਟਸ<ref name="ers.usda.gov">{{cite web|url=http://www.ers.usda.gov/Publications/ERR94/|title=Energy Use in the U.S. Food System|year=2010|publisher=United States Department of Agriculture|author1=Patrick Canning|author2=Ainsley Charles|author3=Sonya Huang|author4=Karen R. Polenske|author5=Arnold Waters|work=USDA Economic Research Service Report No. ERR-94|access-date=2017-05-09|archive-date=2010-09-18|archive-url=https://web.archive.org/web/20100918182458/http://www.ers.usda.gov/publications/err94/|dead-url=yes}}</ref>