Sprayer applying herbicide over corn stubble.

Ears of field corn with poor seed fill due to an unidentified abiotic factor.

Tool for installing an adjustable gate in an irrigation system in use on field corn.

Graphic illustrating various factors affecting crop yield.

Graph showing interacting influences on crop yield of corn.

Diagram illustrating leaf orientation in field corn.

The center pivot sprinkler irrigation sysem in use on a young field corn field.

A cultivator in operation in  a field corn field.

A field corn field under cultivation.

Deep chiseling a field of corn stubble.

A cultivator in operation on a field corn field.

A planter in use during a field corn planting operation.

A planter in use during a field corn planting operation.

Herbicide sprayer on corn stubble.

Center pivot irrigation system watering a field of corn.

Harvester loading a truck with recently cut corn silage.

Combine harvesting field corn.

Combine harvesting field corn.

Tractor-driven dammer-diker cultivator in field corn.

Close-up view of a dammer-diker cultivator for field corn.

Ammonium fertilitizer injector in field corn.

Close-up view of the pipe and cable of a cablegation system irrigating field corn.

Center pivot irrigation system with boombacks, used for irrigating field corn.

View down the line of a center pivot irrigation system equipped with LEPA nozzles.

Center pivot irrigation system with spray heads on drops, used for irrigating field corn.

Close-up view of the LEPA head of a center pivot irrigation system, in bubble mode, watering field corn.

View of the LEPA heads of a center pivot irrigation system, in spray mode, watering field corn.

Supply ditch and linear move irrigation system for field corn, at the Agricultural Research, Development and Education Center of Colorado State University.

Surge irrigation system in use on field corn.

Close-up view of surge valve used in irrigation systems.

Flexible gated pipe for use in irrigating field corn.

Crawler tractor moving corn silage into a pit for storage.

Field corn silage cutter at Fruita, Colorado.

Close-up view of the cutting mechanism of a field corn silage cutter.

Lay-flat pipe used for irrigation of field corn.

Lay-flat pipe irrigating fieldcorn.

Surge irrigation of field corn.

Gated irrigation pipe, with socks, irrigating field corn.

Fertilizer injector for irrigating (fertigating) field corn.

Surge irrigation of field corn in Colorado.

Pit for storage of corn silage after harvest.

Oil well in operation in a corn field.

Ear of corn that was only partially pollinated.

Field corn plants - showing ears - at the early milk stage.

Ear of field corn at the milk stage, with husks pulled back to show kernels.

Field corn plants, with ears.

Ear of corn at the late silk stage, with husks pulled back to show kernels.

Mature ear of sweet corn on the stalk

Mature ear of sweet corn on the stalk near Delta, Colorado, with husk removed to show kernels.

Close-up view of mature ear of sweet corn on the stalk near Delta, Colorado, with husk removed to show kernels.

Ear of field corn at the dent stage - husk peeled back to show kernels.

Ear of field corn at the dent stage - husk peeled back to show kernels.

Very young ear of field corn nearly at the silk stage.

Ear of field corn at the silk stage.

An ear of sweet corn on the cob.

Close-up view of an ear of sweet corn on the cob.

Ear of sweet corn at the silking stage.

Seedheads of teosinte (Zea mexicana), a close relative of corn, near Tecoman, Mexico.

Close view of sweet corn silks.

A graphic morphological description of a field corn ear (upper panel) and a filed corn kernel/grain (lower panel) in the laboratory.

Close-up view of three cobs of blue corn, showing variation in pigmentation of the kernels.

A scenic view of a cultivated field corn field.

A scenic view of a  field corn field under cultivation.

Scenic view of a subsistence farm growing field corn in Ecuador.

Irrigation furrows in a field of corn 8 inches tall.

Sweet corn plants in the field.

Line source distribution for field corn.

Landscape view of an extensive crop of field corn.

Tassels of field corn.

Close-up view of a field corn tassel.

Sweet corn being harvested in the field.

Combine harvesting field corn and loading it into a truck in the field.

Combine harvesting field corn and loading it into a truck in the field.

Chopping and harvesting field corn plants damaged by freezing temperatures.

Harvesting field corn silage.

Volunteer field corn (Zea mays) in a drybean field as weeds.

A volunteer field corn on the field of an economic crop as a weed.

Inspection of field corn plants in the field.

Scenic view of corn fields and mountainous terrain near Pasto, Colombia.

Ear of corn left in the field to sprout into volunteer plants -- close-up view of sprouting kernels.

Ensilage of field corn for use as livestock feed.

Rows of young corn plants at the pre-tassel stage.

Field corn plants ready for harvest.

Field corn plants, with tassels.

Field corn plants at the early milk stage.

Irrigated field corn in western Colorado.

Volunteer corn in peanut

Some young field corn plant at the 5-leaf stage of development on the field.

Corn plant at the tassle stage, displayed to show features of the entire plant.

A field corn planter in operation.

Ears of field corn spread to dry in the sun near Cajibio, Colombia.

Market standard for #1 field corn.

Plant breeding (field corn) in progress.

Corn field and bridge in the steep countryside near Tenerife, Colombia.

Field corn and squash gourds piled in the field near San Luis Potosi, Mexico.

Scenic view of field corn and mountainous terrain near Pasto, Colombia.

Scenic view of a field of sweet corn in western Colorado.

Close-up view of white popcorn seeds.

Close-up view of white corn seeds to be ground into flour.

Close-up view of flint corn seeds.

Close-up view of the seeds of Rainbow Inca sweet corn.

A field corn seedling on the field.

Field corn seedlings dead from an unidentified abiotic factor.

Field corn seedlings dead due to an unidentified abiotic factor.

Seedlings of field corn.

Field corn seedling.

Irrigation furrows in a corn field.

Run-off of irrigation water from an irrigated field corn field.

Stalks of field corn cut to show shape of the cross-section.

Pheromone dispenser intended as a mating disrupter for insect pests of sweet corn.

Pheromone trap set for insect pests of sweet corn.