Answer:
Due to difference in planting of crops.
Step-by-step explanation:
There are many vegetables and crops that are planted in the spring season is known as spring planting while on the other hand, some crops are grown in the autumn season is known as autumn planting. The crops that require spring season can't be planted in the autumn season and vice versa. The Manor System is a type of system of agricultural that is present in the Middle Ages, owned by a Lord and run by peasants. Lords provide protection from the external environmental threats whereas peasant provide labour for the plantation of crops.