土壌 どじょう流出 りゅうしゅつじゃなかったです
dojōryūshutsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 土壌流出

1. Soil erosion didn't happen.; It wasn't soil erosion.

Past/Perfective
Negative
Polite
Casual Register