Is it permissible for a tenant to take sole possession of a plot of land he rented with a partner, after he himself completed all licensing procedures?

The partnership contract is one of the permissible contracts, so each partner may dissolve it whenever they wish. There is no harm in dissolving the contract, but actions taken before the dissolution are valid and belong to both partners, who divide them according to each one's share. This includes the benefit derived from the leased land.