Availability of Micro-Nutrients in Organic and Inorganic Fertilizers(IN PPM)
Plant synthesize their food material by assimilation of 18 element, out of which 3 element (carbon, oxygen and Hydrogen) are obtained from water and remaining 15 element (Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, Sulphur, Iron, Boron, Magnesium, Zinc Molybdenum, Copper, Nickle, Cobalt and vanadium) are obtained from soil.
The elements which are required in small quantity by the plants are called micro-nutrient though these micro- nutrients are required in small quantity by the plants but they are involved in different metabolic activity of the plant and play an important role.
In- organic fertilizers
+ Availability of micro- nutrient
-Non- availability of micro-nutrient.
- 1 PPM to 50 PPM- +
- 51 PPM to 200 PPM- ++
- 201 PPM to 700 PPM- +++