7Rishikesh Singh J.Nagendra Babu.Multifaceted Application of Crop Residue Biochar as a Tool for Sustainable Agriculture: An ecologicalPerspective[J].Ecological Engineering,2015,77(4):324-347.
8ShenggenFan,Joanna Brzeska.Productivity, and Public Investment in East Asian AgricuIture[J].Handbook of AgriculturalEconomics,2010,4(5) :3401-3434.
9StelaTodorovajordanka Ikova.Multifunctional Agriculture: Social and Ecological Impacts on the Organic Farms in Bulgaria[J].Procedia Economicsand Finance,2014,9(2):310-320.