3West T O, Marland G. A synthesis of Cardon Seques- tration, Carbon Missions and Net Carbon Flux in Agricul- ture. Comparing Tillage Practices in United States. Neth- erlands . Agriculture Ecosystems and Environment, 2002, p. 91. 被引量:1
4Dubey A, lal R. Carbon footprint and Sustainability of Agricultural Production Systems in Punjab, India, and O- hio, USA. India . Crop Improvement, 2009. 被引量:1