Well ... that was interesting.  Did you know you can accidentally hit 2 buttons and erase everything you just typed and close the browser window?  Rather than retype the entire thing, let me just post a few links to follow and consider. There are folks who swear by and swear at each of them.  You just need to find what works for you.

www.farmworks.com

http://www.easyfarm.com/

http://www.agmis.com/

http://www.iowafarmbusiness.org/pcmarsaccounting.html