Low hanging fruit?

Low hanging fruit?

Nitrogen rate management (MRTN) is the low-hanging fruit of the Iowa Nutrient Reduction Strategy, a win-win for profitability and the environment.  On closer inspection, that fruit is even juicier than we thought; but harder to reach.   Here’s the paradox of nutrient management that the general public fails to grasp.  We don’t know with any certainty at application time how much nitrogen the corn crop will need or how much nitrogen will be left in the soil come July when the crop starts maturing.  Corn stalk nitrogen tests and split applications can improve the accuracy of the guess, but farmers still have to guess.  If they guess too low, they lose income.  So most farmers err on the high side, which means that (all else being equal) more nitrogen will end up in our streams. Figure by John Sawyer at ISU.  The economically optimum nitrogen rate varies by year, even on the same field. We may not know what’s the right amount of nitrogen...
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3 Lessons from the Iowa Water Conference

3 Lessons from the Iowa Water Conference

Several of our staff attended the Iowa Water Conference on March 12 and 13.  The event brings together hundreds of smart, hard-working people that are working  to improve water quality, restore aquatic habitat, and control flooding across the state of Iowa.  We always learn a lot from both the presenters and the other attendees, and come away energized.  Here are our top three lessons we learned this year: 1. Farms can simultaneously improve water quality and wildlife habitat Adam Janke, Extension Wildlife Specialist, talked about how the practices being used for nutrient reduction can also benefit many of Iowa's species of greatest conservation need.  For example, trumpeter swans like CREP wetlands. Migrating ringneck ducks and Topeka shiners use oxbow wetlands.   Meadowlarks use prairie strips. We will be pursuing these kinds of synergies in three watersheds with a National Fish and Wildlife Foundation grant, so it was great to hear specifics. 2. Retailers of agricultural products need to be part of water quality solutions Chris...
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