こう収量 しゅうりょう品種 ひんしゅではありませんでした
kō shūryō hinshudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 高収量品種

1. Was not a high-yield variety.; It was not a high-yielding variety.

Past/Perfective
Negative
Polite
Formal Register