Elwyn Taylor, Iowa State University climatologist, reported that 200-bushel corn needs 19 to 23 inches of water during the growing season. For 200-bushel corn at 75 degree F (soil temperature), corn needs 1-acre inch of water per week, doubling to 2 inches at 85 degrees F, and doubling again to 4 inches at 95 degrees F. Read more in this article from Ohio's Country Journal.

A study from the University of Florida indicates that Palmer amaranth can evolve life-history traits to increase its potential to grow and reproduce in various cropping systems.

Resistant pigweed has become a big problem in many parts of western Texas and presents a formidable challenge for the fledging no-till movement developing in that area of the state.