Question

Soil fertility can be increased with out addition of fertilisers by

• A. Strip cropping
• B. Crop rotation
• C. Terracing
• D. Roots

Answer 1

The correct option is B Crop rotation

Crop rotation is the practice of growing a series of different types of crops in the same area in sequential seasons. Crop rotation gives various nutrients to the soil. Growing the same crop in the same place for many years in a row disproportionately depletes the soil of certain nutrients. With rotation, a crop that leaches the soil of one kind of nutrient is followed during the next growing season by a dissimilar crop that returns, that nutrient to the soil or draws a different ratio of nutrients: for example, rice followed by cotton.

Strip cropping or strip farming is defined as alternating crop rows between heavy-rooted plants and loosely-rooted plants to minimize erosion. Terracing is the practice of creating nearly level areas in a hillside area. The terraces form a series of steps, each at a higher level than the previous.