Residual Effect of Nitrogen Fertilization on Nitrous Oxide Flux and Yield of Three Cowpea Varieties (Vigna unguiculata L.) in Rainfed Rice Fields. j Trop. Soils [Internet]. 2019 Feb. 14 [cited 2025 Oct. 31];23(2):91-8. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/274