Discuss the various methods which are used to control plant diseases.
Discuss the various methods which are used to control plant diseases.
Methods to control plant diseases:
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On a level road, a scooterist applies brakes to slow down from a speed of 10m/s to 5m/s. If the mass of the scooterist and the scooter be 150kg, calculate the work done by the brakes. (Neglect air resistance and friction)
Two objects having equal masses are moving with uniform velocities of 2m/s and 6m/s respectively. Calculate the ratio of their kinetic energies.
Calculate the work done by the brakes of a car of mass 1000kg when its speed is reduced from 20m/s to 10m/s?
Suppose a planet exists whose mass and radius both are half those of the earth. Calculate the acceleration due to gravity on the surface of this planet.
Match the columns I, II and III.
| | Column I | | Column II | | Column III |
| 1. | Oil seeds | a. | Red Sindhi | i. | Sahiwal |
| 2. | Intercropping | b. | Mustard | ii. | Sunflower |
| 3. | Local breeds | c. | Vitamin A | iii. | Maize |
| 4. | Poultry feed | d. | Soybean | iv. | Vitamin K |
