Combined controlled-released nitrogen fertilizers and deep placement effects of N leaching, rice yield and N recovery in machine-transplanted rice
Keywords: CRNF; controlled-release nitrogen fertilizer; BBF; bulk blending mixture fertilizer; PCU; polymer-coated urea; SCU; sulphur-coated urea; B; a single basal application with broadcasting; S; deep placement fertilizer by mechanical side-dressing fertilizatio