When natural malefic owns trine(9th or 5th
houses) then it will act like a malefic, if natural malefic owns kendra(4th
or 7th or 10th houses)then it will act like benific.For
Taurus ascendant Saturn rules one malefic house and one kendra house so it should
behave like both malefic and benefic and it should not be yoga karaka
planet But why saturn is yoga karaka for
this ascendant?? because its first own
good house( trine house which is 9th) after that only bad house (10th
house rulership which is generally bad
for natural malefic ) and it mostly gives good results