"People have gone crazy with chickpeas. It's unbelievable how many acres there are," said Kirk Hansen, who farms 350 acres (142 hectares) south of Spokane in eastern Washington, where wheat's reign as the king crop has been challenged.

American farmers still plant wheat over a vast landscape that stretches from the southern Plains of Oklahoma and Texas north through Kansas, Nebraska and the Dakotas as well as dry regions of Washington and Oregon. However, this year's crop of 45.7 million acres (18.49 million hectares) is the smallest since 1919.

North Dakota harvested wheat acres are down 15 percent, Montana 11 percent and Nebraska 23 percent, to the state's lowest winter wheat acres on record.

Fewer farmers planted wheat after a 2016 crop that was the least profitable in at least 30 years, said grain market analyst Todd Hultman, of Omaha, Nebraska-based agriculture market data provider DTN.

Many farmers took notice of a surging demand for crops driven by consumer purchases of healthy high-protein food.

"The world wants more protein and wheat is not the high-protein choice and so that's where your use of those other things come into play and are doing better," Hultman said. "Up north around North Dakota you will see more alternative things like sunflowers, lentils and chickpeas."

How long the new trend will continue is unknown. While some farmers will likely switch back to wheat when profitability returns, others may keep planting the alternatives because demand is expected to remain strong, keeping prices at attractive levels.

According to the US Department of Agriculture, acres planted in chickpeas, also known as garbanzo beans, are at 603,000 (244,030 hectares) this year, up nearly 86 percent from last year.

North Dakota more than tripled chickpea acres planted to 44,100 (17,847 hectares) and Montana increased acres 150 percent to 247,000 (99,960 million hectares). Nebraska increased chickpea acres 79 percent to 5,200 acres (2,104 hectares).

The USDA says lentils reached a US record high 1.02 million acres (0.41 million hectares) planted this year.

A farmer in southwest North Dakota, for example, could expect to earn $105 an acre on small chickpeas and around $89 an acre planting lentils this year, according to data compiled by North Dakota State University. The same farmer would lose $21 an acre on winter wheat and $4 an acre on spring wheat.

Wheat profitability has fallen precipitously.

In Illinois, wheat fell from more than $7.13 a bushel in 2012 to $4.30 this year, while for the same period land costs rose 10 percent.

Lentils are increasingly used in cereals, energy bars, chips and pasta as a way to boost protein and fiber content. General Mills now offers Cheerios Protein, which includes lentils, and Barilla Protein Plus pasta contains flour from lentils and chickpeas as an ingredient.

About 20 percent of US consumers now say they eat at least one meatless meal daily and get their protein instead from plant-based sources, said Kelly Weikel, director of consumer insights at Technomic, a Chicago-based market research firm that tracks food trends.

"We've been able to maintain a strong demand for these crops, which is why farmers in that northern Plains and Washington and Idaho area continuing to grow them and increase their acreage," said Tim McGreevy, an eastern Washington farmer.

High-protein snacks that were once found primarily in health food stores are now available in typical grocery stores.

Hummus is a good example. Made from chickpeas, the dip and sandwich spread was considered an exotic Middle Eastern food just a few years ago but is now found in more than a quarter of US households. Hummus sales have grown to $700 million to $800 million in recent years from $10 million in the late 1990s.

USDA reports show other crops have been pushed to record planting this year by changing consumer tastes including canola and hops.

Canola, used for frying and baking and as an ingredient in salad dressings and margarine, was planted on 2.16 million acres (0.87 million hectares) this year, 22 percent higher than the previous record set in 2015, the USDA said. (AP)