Agricultural income / foreign income

Hi,

 what if i'm having agricultural loss. is there any provision to set off , if not then what is the remedy ?

what is treatment for foreign income, should we need to disclose it if tax is already deducted in foreign(DTAA) or is there any section under which i can get relief  & what if i don't disclose it ?

Please help me out asap !!!

Thanks a lot in Advance !!!