Micronutrients are essential to plant growth and health that are only needed in very small quantities. Which of the following are not micronutrients in plants?
(1) Zinc (2) Manganese
(3) Iron (4) Sodium
(5) Potassium (6) Copper
4 and 5 only
Macronutrients are needed in large quantities in plants.These are nitrogen, phosphates and potassium.
The secondary nutrients are calcium, magnesium, and sulphur. For most crops, these three are needed in lesser amounts than the primary nutrients.
Micronutrients are nutrients required by organisms throughout life in small quantities to orchestrate a range of physiological functions. In general, farmers only apply micronutrients when crops show deficiency symptoms, while micronutrient deficiencies decrease yields before symptoms appear. These are Boron, Chlorine, Copper, Iron, Manganese, Molybdenum, Zinc.