Correct Answer: D
Explanation:
Potassium is the third major plant and crop nutrient after nitrogen and phosphorus. It has been used since antiquity as a soilfertilizer (about 90% of current use). Potash is important for agriculture because it improves water retention, yield, nutrient value, taste, colour, texture and disease resistance of food crops. It has wide application to fruit and vegetables, rice, wheat and other grains, sugar, corn, soybeans, palm oil and cotton, all of which benefit from the nutrient’s quality enhancing properties.