Planting of soybean and maize in alternate rows in the same field :
Inter cropping
The correct option is B.
Explanation of the correct option :
Explanation of the incorrect options :
Option A:
Crop rotation is a practice where different crops are grown on the same land in preplanned succession.
Option C:
Mixed cropping is a method where two or more crops are in the same field simultaneously at the same time without any definite pattern.
Option D:
Micropropagation is the artificial process of producing plants vegetatively through tissue culture or cell culture technique.
Final answer: Planting soybean and maize in alternate rows in the same field is known as intercropping.