Researchers have studied the cost-effectiveness of growing halophytes -- salt-tolerant plant species -- for animal forage  Halophytes require more water than conventional crops, but can be irrigated with seawater, and pumping seawater into farms near sea level is much cheaper than pumping freshwater from deep wells
Thus, seawater agriculture near sea level should be cost-effective in desert regions although its yields are smaller than traditional, freshwater agriculture
Costs other than the costs of irrigation are different for halophytes grown by means of seawater irrigation than for conventional crops.