1. There is no legal infirmity for an agriculturist to purchase an agricultural land in Karnataka, since all these people formed a group to purchase this property jointly and also all are having agriculture background, there is no issue in it.
2. How can this be considered as in valid, plain reading of the provisions will not get you the correct meaning, you may have to get it interpreted through a lawyer
If the land under consideration is agricultural and if you intend to develop the land for residential, commercial, or industrial use, it has to be converted to non-agricultural land and a non-agriculture order has to be obtained from the collector of the district where the property is located. Along with this, you need to take the latest receipts evidencing the payment of non-agriculture tax. In cases where the conversion from agricultural use to non agriculture use is not done within the stipulated period, there should be an order from the authority concerned extending the period.