You’ll draw cards equal to the number of land cards put into graveyards from the discards and sacrifices. Only count the cards that are land cards in the graveyard. If a player sacrifices a land token, you won’t draw a card for it. Similarly, if a player sacrifices Ashaya, Soul of the Wild (which has an ability that makes it a land on the battlefield), it is a creature card in the graveyard, not a land card, so you won’t draw a card for it.