Wihardjaka, A. (2019). Residual Effect of Nitrogen Fertilization on Nitrous Oxide Flux and Yield of Three Cowpea Varieties (Vigna unguiculata L.) in Rainfed Rice Fields. JOURNAL OF TROPICAL SOILS, 23(2), 91–98. https://doi.org/10.5400/jts.2018.v23i2.91-98