This means that the plough cannot return along the same line for the next furrow. It bears transversely grooved ridges and a deep furrow running along the middle. According to Hesiod, they had intercourse in a ploughed furrow. They had intercourse as Demeter lay on her back in a freshly plowed furrow. Surface irrigation can be subdivided into furrow," border strip or basin irrigation". The word "delirium" is Latin for "going off the furrow," a plowing metaphor. It is erectile and hidden in a dorsal furrow. Finally, survivin localizes to the midbody at the cleavage furrow. Sometimes there is a large central furrow, with smaller fissures branching perpendicularly. Irrigation can either be managed by drip, sprinkler, furrow or watering can. Center-pivot irrigation uses less labor than many other surface irrigation methods, such as furrow irrigation. Septins in "C.elegans" concentrate at the cleavage furrow and the spindle midbody during cell division. Surface irrigation comes in three major types; level basin, furrow and border strip. The structure had a shallow furrow which opened towards the front. The replacement was a utilitarian post and girder structure supporting a ridge and furrow roof.