Triticum aestivum var spada on left, T. durum in middle, and T. aestivum var mec. on right

Irrigation of spring wheat in the San Luis Valley, Colorado.

Scenic view of rolling fields of winter wheat in southeastern Washington state.

Winter wheat field demonstrating clean tillage during fallow to control wheat streak mosaic virus.

Winter wheat field demonstrating clean tillage during fallow to control wheat streak mosaic virus.

Scenic view of winter wheat fields in southeastern Washington state.

Scenic view of a winter wheat field in the San Luis Valley of Colorado.

Winter wheat field near Cheyenne Wells, Colorado.

Winter wheat disease survey conducted by Vidal Velasco and Merlin Dillon.

Members of a winter wheat disease survey team in 1995: Jack Riesselman, Gary Lancaster, Joe HIll, and Vidal Velasco.

Winter wheat disease survey being conducted by JackRiesselman and GaryLancaster.

Winter wheat field day led by Jerry Johnson, Darrell Hanavan and Scott Haley, Colorado State University, in1999.

Wheat combine.

Tractor and grain wagon used during wheat harvest.

Grain storage bins and elevator, used for winter wheat and field corn.

Irrigation system for a winter wheat field.

Scenic view of a field of winter wheat.

Scenic view of a field of winter wheat.

Field of maturing winter wheat.

Wheat field showing different varieties growing in a trial.

Flowering heads of winter wheat.

Close-up of the flowering head of one variety of winter wheat.

The flowering heads of one variety of winter wheat.

Close-up of the flowering head of one variety of winter wheat.

Seedheads of small grain winter wheat.

Small grained winter wheat.

Grinding mill in use in the laboratory during research on winter wheat.

Printout from a mixograph used to determine protein content of wheat in the laboratory.

Printouts of the mixograph curves of protein content in different wheat varieties.

Mixograph, used in a laboratory for determining the protein content of wheat flour.

Mixograph in use in the laboratory to determine protein content of wheat flour.

PPO test being conducted on seeds of winter wheat in the laboratory.

Winter wheat field day, Colorado State University Extension, with plots undergoing variety trials in the distance.

Inspecting a mature field of winter wheat.

Combines harvesting winter wheat.

Display of breads and other products made from winter wheat.

Using a handheld electronic meter to assess the canopy color and health of a field of wheat.

Using a handheld device to determine temperature of the canopy of wheat in the field.

Seedlings of winter wheat being heat-hardened in the field.

Laboratory equipment set up to conduct a membrane test on winter wheat plants.

Winter wheat leaves undergoing a TTC test in the laboratory.

Test tubes set up to conduct a TTC test on winter wheat in the laboratory.

Leaves of winter wheat inserted into test tubes, ready to undergo testing in the laboratory.

Laboratory equipment set up for doing conductivity tests on the leaves of winter wheat.

Crossing winter wheat in the greenhouse.

Spray coupe for use in applying pesticides to winter wheat.

Spray coupe for use in applying pesticides to winter wheat.

Spray and mixing tanks for applying pesticides to winter wheat.

Spray and mixing tanks for applying pesticides to winter wheat.

Grain storage facility in the San Luis Valley, Colorado.

Center pivot irrigation system in a field of winter wheat, February.

Cattle standing next to the center pivot irrigation system in a field of winter wheat.

Beef cattle in a winter wheat field.

Cattle in a winter wheat field.

Combine harvesting winter wheat.

Combine harvesting winter wheat.

Close view of a combine harvesting winter wheat.

Side view of a combine harvesting winter wheat.

Tractor-driven baler baling wheat straw.

Back end of a wagon loaded with bales of straw gathered from a field of winter wheat.

Disking winter wheat straw.

Winter wheat field at maturity.

Winter wheat variety trial in research plots

Winter wheat variety trials

Field trials of winter wheat.

Grain loading facility for storage of winter wheat and field corn.

Scenic view of a volcano and winter wheat fields overlooking Pasto, Colombia.

Tractor-driven tooth rake in spring, used for cultivating winter wheat.

Tooth rake used in cultivating winter wheat.

Tractor-driven tooth rake in spring, used for cultivating winter wheat.

Tractor-driven tooth rake in spring, used for cultivating winter wheat.

Beef cattle in a field of winter wheat.

Beef cattle in a field of winter wheat.

Close view of winter wheat plants in spring.

Snow melting off of winter wheat plants.

Winter wheat emerging from melting snow.

Winter wheat field with adjacent patch of snow.

Scenic view of a river and wheat and alfalfa fields in southern Chile.

Winter wheat plants in a field.

Winter wheat seedlings.

Trailer and storage bin for wheat.

Trailer of wheat parked next to a storage bin.

Field preparation equipment for winter wheat - disk for cultivation and tank of ammonia fertilizer, mounted behind a tractor.

Winter wheat field cultivator, pulled by a tractor.

Close view of a field cultivator for winter wheat.

Winter wheat harvest near Kersey, Colorado.

Winter wheat harvest near Kersey, Colorado - combine and harvest wagon.

Winter wheat combine, Kersey, Colorado.

Irrigated field of winter wheat near Julesburg, Colorado.

Mature irrigated winter wheat near Burlington, Colorado.

Mature heads of winter wheat, Burlington, Colorado.

Tractor-driven planter for winter wheat.

Burned wheat stubble near Yuma, Colorado.

Distant view of a tractor-driven planter sowing seeds of winter wheat.

Wheat planter in action, sowing winter wheat in a field cultivated and prepared for planting.

View of a wheat planter in action.

Side view of a wheat planter sowing wheat.

Truck unloading wheat into an elevator and storage bin.

Truck unloading wheat into an elevator and storage bin.

Elevator and bins for storing wheat.

Combines harvesting wheat.

Combines harvesting wheat.

Close-up view of the seeds of hard red winter wheat.

Close-up view of seeds of hard white winter wheat.

Close-up view of seeds of hard white spring wheat.

Close-up view of seeds of soft white spring wheat.

Tractor-driven winter wheat planter.

Planting winter wheat.

Wheat plant used in research into biological control of the Russian wheat aphid.

Wheat plant used in research into biological control of the Russian wheat aphid.

Winter wheat plants at the pre-boot stage of development.

Winter wheat plants at the pre-boot stage of development.

Winter wheat plants in flower.

Winter wheat plant in flower.

Winter wheat plant in flower.

Seedling of winter wheat.

Winter wheat plants dug up to show the roots.

Winter wheat plant dug up to show the roots.

Winter wheat plants dug up to show the roots.

Surveying a winter wheat field.

Examining stubble in a winter wheat field.

Winter wheat plants dug up to show the roots.

Mature seedheads of winter wheat.

Mature seedheads of winter wheat.

Mature wheat in a field used in a biosolids study.

Study plot of winter wheat being harvested by a combine.

Crossing winter wheat plants in a greenhouse.

Surveyors of seed increase in a field of winter wheat.

Surveying a field of winter wheat at maturity.

Mature field plot of TAM winter wheat.

Using a Hege plot combine to harvest winter wheat grown in experimental plots.

Field set-up for weighing samples of wheat as it is harvested from research plots in the field.

Measuring the height of the wheat variety PI372129 grown in a research greenhouse.

Two Colorado State University wheat researchers: Frank Peairs and Jim Quick.

Comparison of wheat cultivars grown in the greenhouse.

Spring wheat plants growing in a research greenhouse.

Baking bread in a primitive oven.

Comparison of the seeds of the red wheat cultivar "TAM107" and the white wheat "Klasic."

Comparison of the seeds of the white wheat variety "Rio Blanco" and the red "TAM107."

Color test of various wheat flours.

Computer and rapid visco analyser set up to test wheat in the laboratory.

Winter wheat plants, ripening.

Head of a winter wheat plant.

Close-up of the head of a winter wheat plant.

Point source irrigation distribution for wheat.

Point source irrigation distribution for wheat.

Close-up view of a mature head of wheat with black awns.

Distant view of a wheat field being burned after harvest.

Burning crop residue after harvest in a wheat field.

Burning crop residue after harvest in a wheat field.

Burning crop residue after harvest in a wheat field.

Burning crop residue after harvest in a wheat field.

Wheat field that has been disked.

Grain wagon for transporting wheat after harvest.

A winter wheat field at the 'heading' stage of development.

A winter wheat field at the 'heading' stage of development.

A winter wheat plant at the 'heading' stage of development.

A winter wheat plant at the 'heading' stage of development.

A winter wheat plant at the 'heading' stage of development.

A winter wheat plant at the 'heading' stage of development.

Winter wheat plants at the 'heading' stage of development.

Winter wheat plants at the 'heading' stage of development.

Winter wheat plants at the 'heading' stage of development.

Winter wheat plants at the 'heading' stage of development.

Winter wheat plants at the 'heading' stage of development.

Winter wheat plants at the 'heading' stage of development.

Winter wheat plants at the 'heading' stage of development.

Winter wheat plants at the 'heading' stage of development.