How can I get hold of rid of serious casing of moss, insensible bio-matter, thatch, etc contained by my grassland? lawn condition from prior owner. This stuff is choking out my grass....

lawn condition from prior owner. This stuff is choking out my grass. Is here something I can spread on grass to help or?
Answers:    Ralph & pcbeachrat are right.

Spray beside a moss killer(I use "Surrender") and then hire a dethatcher

You may want to also use a coreing electrical device which pulls small
plugs of soil from the lawn. Rake up plugs and despose of. Then spread screen top soil over lawn to permeate plug holes , when finished existing grass should be above any soil remaining on surface, then fertilize
In NZ i would do this surrounded by spring/early summer
Coreing helps to rearrange drainage/allows air into compacted soils
Nope- attain an old-fashioned substantial steel rake, and get to work de-thatching. Once it's over, you can prevent it from reoccuring by taking meticulousness of the lawn.