Stubble Nutrient Value Calculator                
Select Crop
  N  P K S Zn Total    
Grain yield (t/ha)              
Grain protein (%)           Nutrient   Elemental Cost $/kg
Grain nutrient concentration(% DM)
Units - mg/kg

Typical values for cereal grains. Range generally plus or minus 10%
Nutrient utilisation efficiency (%)
Grain harvest index           K
Maximum  crop dry matter (kg/ha)           S
Nutrient removal in grain (kg/ha)      
Nutrient removal in grain (kg/t)   Income from crop residue removed
Crop nutrient uptake (kg/ha)   Stubble removed (t/ha)
Weight of crop stubble (kg/ha)           Stubble value  ($/t)
Nutrient in stubble (kg/t)   Income ($/ha)
%  stubble removed              
Total  stubble nutrient removed (kg/ha)      
Total nutrient removed in grain and stubble (kg/ha)      
Nutrient value removed in stubble ($/ha)    
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