0907CornCropNutrientssr.cfm 0907CornCropNutrientssr.cfm Managing corn crop nutrients
Home News Livestock Crops Markets Hay, Range & Pasture Home & Family Classifieds Resources This Week's Journal



Farm Survey


AgriMartin
Journal Getaways

Advertisement
Reader Comment:
by Wheat_Harvest movie

"Thanks so much for the article! These are the types of people we hope to"....Read the story...
Join other discussions.

Managing corn crop nutrients


By David G. Hallauer

Meadowlark District Extension Agent

With a corn crop like many of you saw this year, any input cost reduction you can make for 2013 is likely on the table. Should your nutrient management plan change? Likely not.

According to Dave Mengel, Ph.D., KSU Soil Fertility specialist, the biggest nutrient "carryover" occurs with severely stunted plants--those 3- to 4-foot tall that didn't form any grain. If that's your situation, you may have retained a large portion of the applied nutrients.

In many cases, we were damaged, but we did form grain. On those fields (close to normal height but with poor grain yields due to heat/drought stress), the nutrient uptake will likely be near normal. Why? Most nutrients are first taken into the vegetation and used or stored, and then translocated to developing grain. Can we see higher residual nutrient levels? Sure, but not to the degree found in the more extreme drought situations.

Remember as well that the release of nutrients can be hard to predict. Nutrient release is based on the carbon to nitrogen ratio of decaying plants. Corn stalks are normally 60:1. Severely damaged stalks may be closer to 35:1 (we need organisms to reduce to 25:1 before N mineralization will occur). We're likely somewhere between, meaning little credit to our 2013 crop for N, P, and S.

How do you measure? Do a soil test. Potassium increases will likely be "captured" in surface soil tests pulled next spring. A profile sample (0" to 24") for nitrogen and sulfur in the spring or late winter will give a better feel for residual nutrients remaining. Phosphorous increases may or may not show up in a spring sampling program.

Date: 9/17/2012



Google
 
Web hpj.com

Copyright 1995-2014.  High Plains Publishers, Inc.  All rights reserved.  Any republishing of these pages, including electronic reproduction of the editorial archives or classified advertising, is strictly prohibited. If you have questions or comments you can reach us at
High Plains Journal 1500 E. Wyatt Earp Blvd., P.O. Box 760, Dodge City, KS 67801 or call 1-800-452-7171. Email: webmaster@hpj.com

 

Archives Search



Inside Futures

Editorial Archives

Browse Archives