fallow (n.) Look up fallow at Dictionary.com
O.E. fealh "fallow land," from P.Gmc. *falgo (cf. O.H.G. felga "harrow," E.Fris. falge "fallow," falgen "to break up ground"), perhaps from a derivation of PIE base *pel- "to turn," assimilated in Eng. to fallow (adj.) because of the color of plowed earth. Originally "plowed land," then "land plowed but not planted" (1523).
fallow (adj.) Look up fallow at Dictionary.com
O.E. fealu "pale, faded, dark, yellowish-brown," from P.Gmc. *falwaz (cf. O.N. fölr, M.Du. valu, Ger. falb), from PIE *polwos "dark-colored, gray" (cf. O.C.S. plavu, Lith. palvas "sallow," Gk. polios, Welsh llwyd "gray," L. pallere "to be pale"). It also forms the root of words for "pigeon" in Gk. (peleia), L. (palumbes), O.Prus. (poalis).