Replenishing the soil

Plants are autotrophs. They can prepare their own food. Do they need any more nutrients?

• yes

• No

Manures are added to the soil to

• It increases the water holding capacity of the soil

• It aerates the soil

• To keep balance of nutrients in the soil

• All the above

The N2​ fixing bacterium associated with root nodules of legumes is known as

• Azatobacter

• Rhizobium

• Lactobacillus

Ravi Wants To Know That Which Activity Promotes The Growth Of Microbes In The Field.

• Watering in the soil.

• Adding manure in the soil.

• Adding fertilizers in the soil.

• Ploughing and adding manure.

Which of these components of food can be synthesized by plants-?

• Carbohydrate

• Fats

• Proteins

• All of these

Which one of the following is not a micronutrient?

• Magnesium

• Molybdenum

• Boron

• Zinc

The minerals involved in water-splitting reaction during photosynthesis are

• Molybdenum Manganese

• Magnesium Chlorine

• Potassium and Manganese

• Manganese and Chlorine

Carnivorous plants are found on

ANitrogen deficient soilBO2 deficient soilCCO2 deficient soilD

• O2 deficient soil

• Nitrogen deficient soil

• CO2 deficient soil

• None of these

Essential macro elements are

• Manufactured during photosynthesis

• Produced by enzymes

• Absorbed from soil

• Produced by growth hormones

Hydroponics are

• Growing of aquatic plants

• Growing of floating aquatic plants

• Growing of plants in sand

• Growing of plants aqueous balanced nutrients