The word "fallow" is correct and can be used in written English.
It generally refers to land that has been set aside and left unseeded or untended, usually in order to restore its fertility. For example, you could use it in a sentence like this: "The farmer left the field fallow for the winter in order to replenish the soil."
Dictionary
fallow
verb
To make land fallow for agricultural purposes.
Exact(60)
Under the artists' unemployment insurance system, paid for by employers and workers' contributions, an actor or technician must work for 507 hours in 10-and-a-half months to gain benefits for the fallow periods between intermittent contracts.
Box office looks likely to dip in the coming session, which appears relatively fallow in the wake of Ultron and a week prior to Mad Max: Fury Road.
By the same token, Mr Friess's largesse is widely seen as having salvaged the campaign of Mr Santorum, the current front-runner, during a fallow period.In theory, super PACs must reveal who their donors are.
Food is riddled with state intervention at every turn, from subsidies to millers for cheap bread to bribes for farmers to leave land fallow.
Most of the land where tobacco and maize used to grow lies fallow, taken over by wild vegetation.
Germany's recent resurgence after a brief fallow period can be traced to two reforms: the loosening of naturalization laws that allowed talented young players from Turkish, African and other immigrant backgrounds to play for Germany, and, yes, a radical overhaul of the country youth-development system.
Many farmers have been hit hard by the drought: last year, California farmers let half a million acres (20,230 hectares) go fallow because of the water shortage, according to a satellite study conducted by the University of California, Davis Centre for Watershed Sciences in conjunction with NASA.
In rural areas, the "white spaces" of fallow spectrum are even more vast.
To make up for the lost runoffs, the Imperial Irrigation District, which manages local water resources, pays farmers to leave their land fallow and runs the "mitigation" waters into the lake.
The Palestinians' frustration, with an Israeli overlord that cramps their every move, and a government that is corrupt and unaccountable, will not lie fallow.
With no produce to sell, and with his fields still fallow, Mr Khan has taken out another loan to repay his existing debts.
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