A farming in which different types of crops are grown in quick succession, in a ...

The practice being described here is known as crop rotation. It's a method where different types of crops are grown in a specific sequence on the same piece of land. The purpose of this method is to maintain soil fertility and health, and to control pests and diseases. This is accomplished by not growing the same crop in the same place two years in a row, which would deplete the soil of certain nutrients and potentially encourage disease and pest build-up.

Now let's quickly look at the other options to understand why they are not correct in this context:

Mixed farming refers to a system where a single farm engages in both crop cultivation and animal rearing. It doesn't necessarily imply a sequence or rotation of crops.

Land rotation is not a commonly used term in agriculture. It could be confused with crop rotation, but it's not accurate in this context.

Continuous cropping, also known as monoculture, is a practice where the same crop is grown year after year on the same piece of land. This is the opposite of crop rotation and can lead to soil degradation and increased vulnerability to pests and diseases.

Therefore, the correct answer is crop rotation.