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| Ministry of Agriculture Food and Rural Affairs, Ontario. | Garlic production. | http:/ / www.omafra.gov.on.ca/ english/ crops/ facts/ 09-011w.htm |
| Ministry of Agriculture Food and Rural Affairs, Ontario. | Corn. | http:/ / www.omafra.gov.on.ca/ english/ crops/ field/ corn.html |
| Mississippi State University. | Crops: Sorghum. What are the growth stages for grain sorghum? | http:/ / www.msucares.com/ crops/ sorghum/ growth.html |
| MSU. | Farmers take a leap of faith: Drop pesticides and costs, but not yield. | http:/ / fadr.msu.ru/ rodale/ agsieve/ txt/ vol5/ 6/ art1.html |
| MSU. | Legume green manures: A potential substitute for fertilizer in maize. | http:/ / fadr.msu.ru/ rodale/ agsieve/ txt/ vol3/ 3/ a6.html |
| New Mexico State University. | Garlic production in New Mexico. | http:/ / aces.nmsu.edu/ pubs/ _h/ h-234.html |
| Ohio State University Extension Fact Sheet. | Anthracnose of tomato. | http:/ / ohioline.osu.edu/ hyg-fact/ 3000/ 3114.html |
| Oregon Biodynamics Group. | Intercropping for pest reduction -- Successful scientific trials. | http:/ / oregonbd.org/ Class/ intercrop.htm |
| PACIFLY. | How to make a bag? | http:/ / www.spc.int/ pacifly/ Control/ Bagging2.htm |
| Practical Farmers of Iowa. | What is ridge till? | http:/ / www.pfi.iastate.edu/ ofr/ RT_description.htm |
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