By WCM Staff on 6/21/2006 7:18 PM

Sidedress nitrogen (N) applications on field or sweet corn can improve the effectiveness of fertilizer N by lowering losses that might occur from preplant-applied N through leaching or denitrification. On sandy soils, leaching is the greatest risk of N loss, and sidedress or split sidedress applications can help control these losses.

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By WCM Staff on 6/15/2006 3:29 PM

The UW revised nitrogen (N) fertilizer guidelines for corn now consider corn and nitrogen prices to determine the most profitable N rate. To assist in applying this new approach, the NPM Program has published a pocket card that summarizes the new guidelines.

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By WCM Staff on 6/1/2006 3:16 PM

Where corn planting has been delayed due to wet soils or where replanting is necessary due to poor stand establishment, use of starter fertilizer is important to increase yields and profits with these plantings.

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By WCM Staff on 5/16/2006 6:21 PM

The University of Wisconsin has recently adopted the Maximum Return to Nitrogen (MRTN) approach for corn N rate guidelines. The MRTN approach considers the N:corn price ratio and is most applicable where purchased N fertilizer is used, but can be used to guide manure or other N-containing organic material application rates. The MRTN approach provides greater flexibility to fine-tune N management based on economic factors and site-specific field conditions.

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By WCM Staff on 5/4/2006 3:03 PM

Should high potash prices change alfalfa fertilization practices? This question has been on producers minds recently. An evaluation of previous research using current economics suggests that some producers might want to consider adjusting their potash fertilization rates.

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