IPI International Potash Institute
IPI International Potash Institute

Table 1. A detailed description of the fertilization treatments.

             
  Table 1. A detailed description of the fertilization treatments.  
  Symbols   Treatment details   Abbreviation used in text  
  T1   Control (no NPK)   T1; Control  
  T2   Farmers’ practice (18:46:30 kg NPK ha-1).   T2; FP  
  T3   Full (100%) recommended PK dose: 40 kg P2O5 ha-1;
40 kg K2O ha-1, all at sowing (basal).
  T3; RDF, Kb  
  T4   Full (100%) recommended P dose+150% RD of K:
60 kg K2O ha-1, basal.
  T4; RDF+50% K, Kb  
  T5   150% P: 60 kg P2O5 ha-1+200% K: 80 kg K2O ha-1, basal.   T5; RDF+50% P+100% K, Kb  
  T6   Full (100%) recommended PK dose: 40 kg P2O5 ha-1;
40 kg K2O ha-1. K dose split between basal and bloom
(30 DAS) applications, 20 kg K2O ha-1 each, respectively.
  T6; RDF, Ks  
  T7   100% P: 40 kg P2O5 ha-1+150% K: 60 kg K2O ha-1.
K dose split between basal and bloom (30 DAS) applications, 30 kg K2O ha-1 each, respectively.
  T7; RDF+50% P+50% K, Ks  
  T8   150% P: 60 kg P2O5 ha-1+200% K: 80 kg K2O ha-1.
K dose split between basal and bloom (30 DAS) applications, 40 kg K2O ha-1 each, respectively.
  T8: RDF+50% P+100% K, Ks