What are some common symptoms of nutrient deficiency in crops?

The symptoms identified in the correct choice—yellowing leaves, stunted growth, and poor fruit or seed development—are classic indicators of nutrient deficiency in crops. Yellowing of the leaves, often referred to as chlorosis, typically occurs in response to insufficient nitrogen, iron, or magnesium. Stunted growth often suggests that the plant is not receiving adequate nutrients necessary for cellular function and development, leading to reduced size and vigor. Poor fruit or seed development indicates that the plant is lacking essential nutrients critical for reproductive processes, which can impact both yield and quality.

These symptoms play a crucial role in diagnosing nutrient deficiencies in agricultural practice, as they help growers make informed decisions regarding fertilization and crop management. In contrast, the other options present symptoms associated with different plant conditions or misinformation; for instance, wilting leaves may indicate water stress rather than a nutrient issue, while dark green leaves with rapid growth can suggest over-fertilization rather than deficiency, and brittle stems with delayed flowering might point to environmental stressors or diseases rather than nutrient status. Understanding these symptoms helps in implementing the right agronomic practices to improve crop health and productivity.