Plate 27g.—Sharp ridges, furrows, or top of a crest at the end of a gentle slope.
Examples of hasty individual covers behind a furrow, a crest, a heap of sand or earth:
Dig the ground as near as possible to crest A of the furrow in the manner indicated for the cover installed behind a fallen tree more than 1 foot high.
Plate 27h.—Narrow furrows.
Use the earth excavated between furrows A and B to build up the earth between furrows B and C and fill up furrow C; continue afterwards as for the sharp ridge.
