IPI International Potash Institute
IPI International Potash Institute

Table 2. Treatments applied in the experiments (A in 2009 and B in 2011).

                           
  Table 2. Treatments applied in the experiments (A in 2009 and B in 2011).  
  No. Fertilizer Autumn   Spring  
      N P2O5 K2O MgO S   N K2O MgO S  
      kg ha-1  
      Trial A (Bardarski Geran, Montana region)  
  1 Control 0 0 0 0 0   0 0 0 0  
  2 NP 27 69 0 0 0   160 0 0 0  
  3 NPK 27 69 180 0 0   160 0 0 0  
  4 NPKMg (autumn Mg) 27 69 180 27 18   160 0 0 0  
  5 NPKMg (split Mg) 27 69 180 27 18   160 0 40 32  
  6 NPKMg (split K; spring Mg) 27 69 120 0 0   160 60 9 6  
  7 NPKMg (split K and Mg) 27 69 120 18 12   160 60 9 6  
      Trial B (Samovodene, V. Tarnovo region)  
  1 Control 0 0 0 0 0   0 0 0 0  
  2 NP 27 80 0 0 0   160 0 0 0  
  3 NPK 27 80 180 0 0   160 0 0 0  
  4 NPKMg (autumn Mg) 27 80 180 27 18   160 0 0 0  
  5 NPKMg (spring Mg) 27 80 180 0 0   160 0 40 32  
  6 NPK (split K) 27 80 120 0 0   160 60 0 0  
  7 NPKMg (split K and Mg) 27 80 120 18 12   160 60 9 12