SSDI Farm Rental

I Sold my farm 2 years ago to pay medical bills and the income for the crop does not get pay till the following year 2010. Since than I went on SSDI how will this effect my earnings since I was not working/

SSDI Income

I receive SSDI income, and my child receives income as my dependent. If that is his only source of income, does he have to file a tax return, or is it necessary for me to claim his income on my own tax return?

SSD Question

My wife is disabled and recieves SSD checks every month. She can no longer work. Can I claim her as a dependent.