What word contains both grass and soil?

There are five qualifying words:

1. Zeng, the same as "Shi" in ancient times, is the name of a kind of rice.

2. Zang means that the crops are not growing strong.

3. Rice, as a verb, means harvest, and as a noun, it means ears of grain.

4. Edge, same as "edge", refers to the strip-like protrusion on an object, or the part where two planes in different directions are connected. When used as an adjective, it can mean majesty and severity.

5. Zhen refers to the grains that are planted later and ripen first.