STORY OF SEASONS: Pioneers of Olive Town

This trophy is tied to the Reaping skill, so this will be the skill to focus on.

During the tutorial Victor gives you, he will give you, among other tools, the Sickle. When you pull this out of your Tool Bag into the inventory, you can use it to cut down wild grass scattered around the farmland. This particular trait of the land can be noticed in two ways: if you run through it, it will slow your character down, and when you're wielding the Sickle, you can press the action button to swing your scythe and cut it down, generating a small pile of grass.

Count the amount of times you actually cut the grass, not the amount of grass you collect. You can track the amount of times you've worked on this in one of two ways:

1) On the Title Menu, there's a trophy icon. Interact with this and you can see your progress on any of the cumulative trophies by scrolling through (unlocked appears on the top, while still locked will appear on the bottom).
2) In-game, go to your menu by using and then go to the left screen, Records. From here, choose Change Title and then open the appropriate option. For this one, you'd end up opening the Reaping skill field, which will show your progress to unlocking titles in that field.