The correct answer is option 2: intercropping. Intercropping is the practice of growing two or more crops in the same field but in different rows. It is a method of crop diversification that allows farmers to maximize the use of space and resources, as well as to reduce the risk of crop failure.

Option 1: Crop rotation is a different farming practice that involves growing different crops in a specific sequence on the same piece of land. It helps in maintaining soil fertility and preventing the buildup of pests and diseases.

Option 3: Alternate cropping is not a commonly used term in agriculture. It is not a correct description of the practice described in the question.

Option 4: Kharif cropping refers to the cultivation of crops during the monsoon season in India. It is not specifically related to growing multiple crops in the same field.

In conclusion, intercropping is the correct term for growing two or more crops in the same field but in different rows.