any referance books also can help..
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Have a look at http://www.agriculture.com\nThat's basically a US farming website. \n\nIf that doesn't help try the US Department of Agriculture website: http://www.usda.gov\n\nThey should be able to provide you with stats and figures for grain production. I found this one example after about 1 minute of searching:\n\nhttp://www.fas.usda.gov/grain/highlights/1999/99-08/us_canada/canwht1.pdf
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Following are websites which may be helpful to you.
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Did you try your local library? There are even people there to help you. You'll find them at the Reference Desk
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It helps. \n\nBuying the book helps, too.
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go to your local library and request access to Reference USA, Harris Infosource or Dunn & Bradstreet.  Access to these sites will be free through your library...or there might be a way for you to access them from home using your libray's site as a portol and your library card as a log on
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Reading the book will help.
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Here's the website you're looking for.  For future reference with other subjects, if you go onto the website of the company that publishes the book, you can usually find a link to the book that you are using.
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Here's a couple of web sites that may be helpful:
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I have listed below some websites that you can look at in the source section that could be an assistance to you.
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Please go thru these sites below very helpful.
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if you have a link to the information ill take a look and see if i can help you out.
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Talk to your librarian. They are well-versed in helping people find appropriate resources for their needs.
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get a reputable guide.
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Go to Barnes and Noble they have some great books on that subject...K
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Perhaps the link will help.  Good luck.
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Below is a webpage that I think will help your.  :)
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These links should do it for you.  Best of luck with it.