A fourth step for {HEAD ~ a hybrid cross} may comprise {TAIL ~ cross pollination} between the first and second parent pea plants 
A fourth step for { HEAD ~ a hybrid cross } may comprise { TAIL ~ cross pollination } between the first and second parent pea plants
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH