Question

what was the strip cultivation? state reason why it was introduced

Answer 1

Strip cultivation is when the large fields are divided into strips and the strips of grass are left to grow between crops and this break the force of wind.
It was introduced to control the soil erosion in hilly areas and this also break the force of wind.

Answer 2

Strip cropping is a method of farming which involves cultivating a field partitioned into long, narrow strips which are alternated in a crop rotation system. It is used when a slope is too steep or when there is no alternative method of preventing soil erosion.

Equity. Land was of variable quality and to be fair everyone strips of good and less productive land would be shared out so that the potential crop would be approximately the same of each producer. This meant that strips held by one peasant were rarely adjacent.
A second reason notable in my part of the UK is that the soil was wet and heavy, a rig or strip was often created from slightly higher ground with better drainage