Potassium:

 

  Deficiency of Potassium

• Potassium starvation of sugarcane plants becomes evident in the early age of the plant (the second-third months of vegetation).
• The stems get thinner.
• The leaf margins become yellow and then completely white.
• Red spots appear in the center of the leaf blade.
• Potassium deficit is most frequently observed on light-textured sandy loams and on strongly carboniferous soils.

 

Note: The maximum amount of potassium is absorbed in the first six months of vegetation and before harvesting.