To no-tillers, atrazine, nitrogen and phosphate are indispensable for maximizing yields of corn, soybeans, wheat and other crops.

Mixing 2 tons of ammonium nitrate with motor oil, Timothy McVeigh produced enough cheap, yet powerful explosive to destroy the Oklahoma City federal building more than 6 years ago. Along with the Sept. 11 terrorist attacks, these disasters may bring changes in the way you purchase fertilizer for your no-till fields.