The practice of leaving land either uncropped and weed-free, or with volunteer vegetation during at least one period when a crop would normally be grown; objective may be to control weeds, accumulate water, and/or available plant nutrients
Fallow land has been dug or ploughed but nothing has been planted in it, especially so that its quality or strength has a chance to improve. The fields lay fallow
the period during which land is left to recover its productivity (reduced by cropping) mainly through accumulation of water, nutrients, attrition of pathogens, or a combination of all three During this period, the land may be bare or covered by natural or planted vegetation The term may be applied to the land itself or to the crop growing on it [GBA]
cultivated land that is not seeded for one or more growing seasons undeveloped but potentially useful; "a fallow gold market" left unplowed and unseeded during a growing season; "fallow farmland
Land that has lain a year or more untilled or unseeded; land plowed without being sowed for the season