Improvement in food resources(b or a)
Macronutrients: They are the nutrients required by plants in large amounts. They are present in plant tissues in amounts more than 10 mmole kg –1 of dry matter. Examples include hydrogen, oxygen and nitrogen.
Micronutrients: They are also called trace elements and are present in plant bodies in very small amounts, i.e. amounts less than 10 mmole kg – 1 of dry matter. Examples include cobalt, manganese, zinc, etc.
(b) Intercropping gives a greater yield on a given piece of land by making use of available resources that would otherwise not be utilised by a single crop.