furrow, thirty tsubo, ridge, rib
畝 centers on a raised line in a field: a furrow or ridge in farming, and by extension a rib-like raised line. The unit 'thirty tsubo' is a specific land-measurement application of the same field-ridge idea.
畝 combines 亩 (a field-related component) with 久, which likely contributes a phonetic element. The character expresses the idea of furrows or ridges in a field.
The left side 亩 looks like a field with a top mark, and the right side 久 suggests something long-lasting. Picture a field with permanent raised ridges that last season after season.
For ボウ, imagine a bow-shaped furrow in the field: bow -> ボウ, and the curved ridge looks like a bow stretched across the land.
ridge (in field); row of raised earth when planting crops
to wind (of a road, river, etc.); to meander; to twist; to snake
ridges of and paths between fields
units of square measure (for rice fields, forests, etc.)
mu (Chinese measure of land area, formerly approx. 600 m.sq., currently approx. 667 m.sq.)
se (Japanese unit of area equal to 30 tsubo, approx. 99.174 m.sq.)
furrow ridges
building rice-field ridges
ribbed fabric; corded fabric; ridged fabric; corduro; repp; rep
furrow; room with ridged roof
ridged whale meat used to make whale "bacon"
warp rib weave (cloth)