Soil Microbial Biomass Carbon under Rhizosphere and Non-Rhizosphere of Maize after a Long-Term Nitrogen Fertilization and Tillage Systems - Dermiyati, .; Department of Soil Science, Faculty of Agriculture, University of Lampung Jl. Soemantri Brojonegoro No. 1, Bandar Lampung INDONESIA 35145 (UNIVERSITY OF LAMPUNG, 2011)