It means to reserve food every year, even if you encounter famine. It also means that you have accumulated money at ordinary times and won't be constrained when you encounter difficulties.
The famine year itself has famine. Famine year, fierce year and bad year refer to famine year, and the year of harvest is not the year of harvest, and the grain harvested by a cow. Completion of maturity refers to bad years, famine years, poor harvests, below-average crop yields and confiscation of crops.