The agricultural cycle is the annual cycle of activities related to the growth and harvest of a crop (Plant.) These activities include loosening the soil, seeding, special watering, moving plants when they grow bigger, and harvesting, among others. The agricultural cycle is the annual cycle of activities related to the growth and harvest of a crop (Plant.) These activities include loosening the soil, seeding, special watering, moving plants when they grow bigger, and harvesting, among others.