• Crop and soil specific N and P efficiency and productivity in Finland 

      Bäckman, Stefan; Lansink, Alfons Oude
      Agricultural and Food Science : 3 (MTT Agrifood Research FinlandThe Scientific Agricultural Society of Finland, 2005)
      This paper estimates a stochastic production frontier based on experimental data of cereals production in Finland over the period 1977-1994. The estimates of the production frontier are used to analyze nitrogen and ...