Crop & Pest Report

Accessibility


| Share

Plant Now, Feed Later (5/11/17)

Due to the early spring fertilizer application delayed by weather, and early planting also delayed due to snow and field wetness, all crops and all fertilizer demands are being compressed into this week and next.

Plant Now, Feed Later

Due to the early spring fertilizer application delayed by weather, and early planting also delayed due to snow and field wetness, all crops and all fertilizer demands are being compressed into this week and next. Many fertilizer retail outlets are booked out for several days to over a week on custom application orders. Because planting date is so critical to farm profitability, it would be best to plant now and apply the fertilizer to the soil surface after planting. Nitrogen is the greatest worry. If the field is neutral to acid in pH, and little residue remains on the surface, urea can be exposed for over a week with little ammonia volatilization. This is one of the only advantages of a tilled-black field, which is a field condition I have little love for. If the soil pH is over 7 regardless of residue and/or there is over 30% residue on the field, the urea should be treated with an NBPT containing product such as Agrotain or Limus to delay ammonia volatilization for around 10 days. If the grower bets that at least ½ inch of rain will fall within a few days of application, then the NBPT product should not be necessary. For more on urease inhibitors, see the NDSU publication Nitrogen Extenders and Additives for Field Crops (SF1581). Fertilizer P, K and S can also be applied to the surface.

Dave Franzen

NDSU Extension Soil Specialist

Creative Commons License
Feel free to use and share this content, but please do so under the conditions of our Creative Commons license and our Rules for Use. Thanks.