Which factor is essential for evaluating the maturity of products like apples and corn?

The essential factor for evaluating the maturity of products like apples and corn is starch content. As fruits and vegetables grow, their chemical composition changes, which includes the conversion of starches into sugars as they reach maturity. Measuring the starch content helps determine the readiness for harvest; higher starch levels typically indicate that the product is still maturing, while lower levels suggest it is more mature and ready for consumption or sale.

Soil quality, water usage, and pest control are all important aspects of agriculture that affect the overall health and yield of crops but do not directly indicate the maturity of the fruit itself. Soil quality can influence growth, while water usage is critical for proper plant development and pest control is essential for preventing damage. However, these factors do not provide direct insight into when a crop is at its optimal maturity for harvesting.