(involves rights of three brothers (residuary beneficiaries under testamentary trust); one brother leased trust property until trust terminated; trustee terminated lease; district court ruled lease was properly terminated, brother was not entitled to compensation for improvements made to leased property, and loans secured by brother against trust property were his obligation alone; appellate court held that terminated lease at end of crop year in which trust terminates was reasonable; court remanded case to determine whether brother installed tile during farm lease and if entitled to compensation; finally, court held that testator intended to treat sons equally and district court did not err in holding balance owing on farm loan was obligation of son).