-
Fate of urea nitrogen applied in solution in furrows to sunflowers growing on a red-brown earth: transformations, losses and plant uptake
C.J. Smith, J.R. Freney, P.M. Chalk and 3 others · 1988
-
Use of surface films to reduce ammonia volatilization from flooded rice fields
G.X. Cai, J.R. Freney, E. Humphreys and 3 others · 1988