Q. No.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
| 1. holding cells together | 2. protein synthesis |
| 3. chlorophyll synthesis | 4. cell wall development |
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Sulphur is an important nutrient for optimum growth and productivity in:
| 1. pulse crops | 2. cereals |
| 3. fibre crops | 4. oilseed crops |
Which of the following element helps in maintaining the structure of ribosomes?
| 1. Magnesium | 2. Zinc |
| 3. Copper | 4. Molybdenum |
In which of the following forms is iron absorbed by plants?
| 1. Ferric | 2. Ferrous |
| 3. Free element | 4. Both ferric and ferrous |
Which of the following element is responsible for maintaining turgor in cells?
| 1. Magnesium | 2. Sodium |
| 3. Potassium | 4. Calcium |
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
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?
| 1. Mn | 2. Zn |
| 3. Cu | 4. Ca |
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