Pasture Land
Ranch
noun
A pasture field is pasture land. It's also a ranch.
ぼくや
まきの
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
The secondary reading is a bit different. That's a family name, and uses the kun'yomi readings of both kanji. We'll consider this secondary for now, but you may have to come back to this when you see this as a name and are all like "what's going on here??"
二、三年くらいしたら、父親が死んで、俺は父さんの牧野を相続する事になると思うよ。
In a few years my father will die and I’ll inherit his ranch.