What is the chemical symbol for Iron in agricultural contexts?

The chemical symbol for Iron is Fe, which is derived from the Latin word "ferrum." In agricultural contexts, Iron is a critical micronutrient essential for plant growth, playing a vital role in processes such as chlorophyll synthesis and enzyme function. This is particularly important because Iron deficiency can lead to poor crop development and reduced yields.

The other options presented do not represent Iron. For instance, Fm does not correspond to any chemical element, while Ir denotes Iridium, and In represents Indium, both of which are not relevant in the context of plant nutrition or agriculture. Therefore, Fe is the only correct choice when discussing Iron in agricultural contexts.