Micro-nutrients or Multi-micronutrients
Micronutrients are element like Ferrous, Zinc, Copper, Magnesium, Boron & Manganese which are required in small quantity but are equally important to make the primary fertilizer available to plant like NPK.
In essence, without Micronutrients, all the nutrients are not available to the crops.
Plant Growth Promoters
Apart from multi-nutrients it is important that the plants get the right amounts of certain organic compounds and biological agents or derivatives that assist in their development and growth. These are called Plant Growth Promoters that help maintain the overall health of the plants. These include:
These improve mineral and vitamin absorption by plants and assist in natural production of hormones that promote growth and enhanced yield quality.