To successfully grow a crop in an arid area, the best strategy would be:
1. ensuring an extensive irrigation system
2. using NPK fertilizers liberally
3. selecting crops adapted to arid areas
4. practicing shifting cultivation

A plant requires magnesium for

Sulphur is an important nutrient for optimum growth and productivity in:

Which of the following element helps in maintaining the structure of ribosomes?

In which of the following forms is iron absorbed by plants?

Which of the following element is responsible for maintaining turgor in cells?

Minerals known to be required in large amounts for plant growth include

1. phosphorus, potassium, sulphur, calcium
2. calcium, magnesium, manganese, copper
3. potassium, phosphorus, selenium, boron
4. magnesium, sulphur, iron, zinc

The most abundant intracellular cation is :

Manganese is required in
1. nucleic acid synthesis
2. plant cell wall formation
3. photolysis of water during photosynthesis
4. chlorophyll synthesis

Which one of the following elements is not an essential micronutrient for plant growth?