It depends on how you are using the word in a sentence. For example, "The farmer hired workers to harvest the crops." In that sentence, the word harvest is used as a verb. It tells what the workers were doing to the crops. However, harvest can also be used as a noun, which could mean "the season for gathering crops".
At harvest time, the workers harvested the harvest.
The farmers worked hard to bring in the fall harvest.
People helped each other harvest and shuck the corn.After the harvest, people in the 1800s threshed the wheat.
What Betty wants is to harvest the corn.The noun clause is What Betty wants, the subject of the sentence.
Some examples:I went outside to harvest the corn.We always wait to harvest the corn in October.
The term "harvest" should not be capitalized unless it is at the beginning of a sentence or part of a title.
Circumscription was used to dictate the proper timeline for planting the crops as it was imperative for us to have an abundant harvest.
Mechanical equipment made it possible to harvest corn much more rapidly.It was time to harvest the vegetables that were growing in the garden.
In Spain, the grape harvest begins in late summer. Iowa's corn harvest is the largest in years. We usually harvest the first peas in April.
The farmer used a sickle to harvest the ripe wheat in the field.
A. Betty wants to harvest the corn.B. When should Betty harvest the corn?C. Betty would like to harvest the corn.D. What Betty wants is to harvest the corn.The answer is D. What Betty wants... the noun clause that acts as the subject of the sentence. Also, ...to harvest the corn. is also a noun clause that is the object of the verb is. See the link below.