Paisancharoen, K., Nunthakit, A., Meunchang, S. and Panpruik, P. (2008) “Effect of Organic, Chemical land Bio-Fertilizers on Maize (var Nakhon Sawan 2) Production in Wang Saphung Soil Series ”, Thai Agricultural Research Journal, 26(1), pp. 82–90. doi: 10.14456/thaidoa-agres.2008.8.