1) the income limit from non agricultural sources for purchase of agricultural land has been increased to Rs 25 lakhs per annum in karnataka
2) your mother can purchase agricultural land if her income is below the limit
3) she can execute gift deed of agricultural land
4) consent of your brothers and sisters is not required
5)SECTION 79A (3) TO (6). Every acquisition of land otherwise than by way of inheritance or bequest in contravention of this section shall be null and void.4. Where a person acquires land in contravention of sub-section (1) or acquires it by bequest or inheritance he shall, within ninety days from the date of acquisition, furnish to the Tahsildar having jurisdiction over the Taluk where the land acquired or the greater part of it is situated a declaration