At each stage ሺݐሻ, the information needed to know for
decision making in order to obtain the optimal solution is the
land available for plantation ሺܮሻ as well as the land being
planted and waiting until harvest in the next particular
periods ሺܮ′ሻ in which ݇ is a set of vegetables being planted
and not yet harvested. That information can be regarded as a
state of the sub problem. Vegetables ሺܮ′ሻ are associated with
the remaining time to harvest ሺݐ′ሻ