Rentals shall constitute a first lien on any and all improvements and crops upon the land leased, prior and superior to any other lien or encumbrance whatsoever whether created with or without notice of the lien for rental due or to become due. When any rental is due and unpaid the commissioner may forthwith attach, without attachment bond, all improvements and crops upon the land leased, or so much thereof as may be sufficient to pay such rental together with all costs necessarily incurred in the enforcement of such lien, and the enforcement of such lien shall work a forfeiture of such lease. The failure of any lessee of state land to pay the rental therefor when due or to furnish additional security for any deferred payment, when required by the commissioner, shall be sufficient cause for declaring any such lease forfeited.