こう収量 しゅうりょう品種 ひんしゅじゃありませんでした
kō shūryō hinshujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 高収量品種

1. It was not a high-yield variety.; It wasn't a high-yielding variety.

Past/Perfective
Negative
Polite
Terminal Form