A farmer introdued garden lizards into his agricultural fields to eradicate insects. What do you name this method ?

What do you mean by crossed fields?

How do you appreciate the farmer, in the agriculture field?

When the farmer cultivated Bananas in his field , most of the banana plants were infected by virus can you suggest any method for the propagation of healthy virus free bananas plants ?

How do you test the pH of the soil in the agriculture field ?

What do you mean by uniform magnetic field?

A scientist with a stopwatch says that he can measure the speed at which he throws a stone upward. What do you think his method is?