Where does “jarovisaatio” come from?

jarovisaatio (Finnish) comes from Russian яровизация, from Russian яровой, from Proto-Slavic jarovъ, from Proto-Slavic *jaro, from Proto-Indo-European yóh₁r̥ — year.

Ancestry of “jarovisaatio”, step by step

StepLanguageWordMeaning
1Russianяровизация—
2Russianяровойspring
3Proto-Slavicjarovъspring
4Proto-Slavic*jaro—
5Proto-Indo-Europeanyóh₁r̥year
Every word from Proto-Indo-European yóh₁r̥ →Every word from Proto-Slavic *jaro →Every word from Proto-Slavic jarovъ →