The purposes of this chapter are to—
(1)
carry out the trust responsibility of the United States and promote the self-determination of Indian tribes by providing for the management of Indian agricultural lands and related renewable resources in a manner consistent with identified tribal goals and priorities for conservation, multiple use, and sustained yield;
(2)
authorize the Secretary to take part in the management of Indian agricultural lands, with the participation of the beneficial owners of the land, in a manner consistent with the trust responsibility of the Secretary and with the objectives of the beneficial owners;