8-Natural r and Agriculture -Rev-1

Which of the following is not true about tilling?

• it improves air circulation in soil

• it helps in loosening of soil

• it helps to sow the seeds.

• it is also called ploughing

Which of the following produces manure?

• cattle dung

• human waste

• plant residue

• all of these

Which is the best technique for watering fruit plants,gardens and trees?

• Moat system

• Sprinkler system

• Drip system

• Chain pump system

What does NPK stand for?

• Nutrients, Pancakes, Kittens
• Nitrogen, Phosphorus, Potassium
• Nitrogen, Potassium, Phosphorus

In order to obtain a higher yield, farmers must undertake various agricultural practices. Which is the first step in this process?

• Addition of manure
• Preparation of soil
• Harvesting
• Irrigation 

Which of the following statements about the sowing of seeds is incorrect?

• Seeds should be sown at proper depth.
• Seeds should be sown close to each other.
• Sowing should be done after loosening the soil.
•  Sowing should be done with the help of seed drill.

THIS INSTRUMENT IS USED FOR

• HARVESTING

• CUTTING

• IRRIGATION

• TILLING

Rabi Crops are grown in _______ season

• Summer

• Spring

• Winter

• rainy

Which of these problems can be caused by air pollution?

• Respiratory problems
• Reduced food sources for humans
• Increased disease for humans
• Decrease in global temperatures

What causes acid rain?

• High concentrations of sulfuric or nitric acid from pollution
• Fertilizer use
• Pesticide use
• CFCs