3: A s4agri:Crop is equivalent to the class obo:PO_0000003, which contains all or most plant varieties.

1: This class represents the set of crop cycles. A crop cycle is a single cycle of cultivating a crop from sowing till harvesting. For a multiyear plant or crop, a crop cycle is the period between first leaving until harvesting.

2: A crop cycle has various attributes, such as the parcel on which the crop is being cultivated as well as various dates, such as first leaves date, blossoming date and fruiting date.