Open Access Research Paper Views (284) Download (105) Response of upland rice (Oryzasativa) varieties to poultry manure and spent mushroom substrate in humid agro-ecology of south –south, Nigeria Orluchukwu, Joseph Amadi, Chinonyelum Ugwu Int. J. Agron. Agri. Res.12( 5), 9-18, May 2018. Key: growthPoultry manureSpent mushroom substrateUpland riceYield Details