As long as crops are growing on the homestead property they benefit from the homestead exemption.
Bailey v. Oliver, 9 S.W. 606 (Tex. 1888).
Oil, gas, and minerals belonging to the property that is a homestead are also a portion of the homestead, Cates v. Greene, 114 S.W.2d 592 (Tex. Civ. App.—Austin 1938, no writ); In re Poer, 76 B.R. 98 (Bankr. N.D. Tex. 1987), and any royalty to which a debtor is entitled upon leasing the minerals is thus also homestead property. In re Poer, 76 B.R. 98 (Bankr. N.D. Tex. 1987).
However, after oil, gas, or minerals have been taken from the land, the homestead exemption is no longer applicable