Home Discussion Forum Nutrient Management Not your Father's N Management

This topic contains 5 replies, has 2 voices, and was last updated by Profile photo of Josh Hiemstra Josh Hiemstra 2 years, 3 months ago.

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  • #736
    Profile photo of Amber Radatz
    Amber Radatz
    Participant

    Here’s an interesting article from Cliff Snyder of IPNI. You may have heard him at the Discovery Farms Annual Conference a few years ago. He eloquently states why we have renewed a focus on nitrogen with our Nitrogen Use Efficiency program. What changes have you seen/made in your tenure on the farm?

    http://www.ipni.net/publication/pnt-na.nsf/0/433F43380AD4F28F8525807A00559E98/$FILE/PNT-2016-Winter-02.pdf

  • #828
    Profile photo of Josh Hiemstra
    Josh Hiemstra
    Participant

    Have not made many changes to N yet as we are dairy and rely on rotation, manure, psnt and now covers. Basic program 25# 2*2 w planter, but also added 3 gal 6-24-6 w/pt of zinc in furrow. If psnt was lacking over top w urea at v4_v5 for ear set. I am thinking we need to start running multiple pants to better determine our timing and apps. Related, I am running a field study for spring applied ams/gypsol/no sulfer to determine if it will boost yield or reduce n needs. It is on a field that was wwheat folled by tillage radish and forage peas.

  • #829
    Profile photo of Amber Radatz
    Amber Radatz
    Participant

    Good stuff Josh! What do you credit for manure? Are you seeing variability in it? Are you relying on some nitrogen from covers too? Give yourself a little more credit for all you’ve already done to fine tune the N side. How long have you been doing PSNT? Really great to have multiple years of data to look back on for that so the results make a little more sense sometimes.

  • #831
    Profile photo of Josh Hiemstra
    Josh Hiemstra
    Participant

    Amber we use SNAP+ to track N from manure use all 2nd and 3rd year credits and legume credits. We sample manure every other year and it stays fairly consistent unless we change our system or handling. We are roofed confinement so water wise we stay close. We do however use our pen pack statigicly to improve poor performing areas in our fields. We have been using PSNT since 2004. I am not veey confident in cover crediting yet, that is why I want to staer running multiple PSNTs during the year to help determine when the N is given back by the covers. Unless you or someone has started that research or has hard data on it that I havent come across.

  • #832
    Profile photo of Amber Radatz
    Amber Radatz
    Participant

    Really great to hear you’re able to get all that value out of the manure. Our NUE project is really showing that manure complicates nitrogen cycling, but also that N credits from manure are ‘real’, meaning that you can feel very good about the system you’ve implemented with crediting as much as possible.

    I know Matt Ruark is working on some N in cover crop questions but yours is really the million dollar question about when N is given back by the covers, if ever. I’ve even heard some talk of N not returning to the soil but instead volatilizing as the cover crop decomposes. Where are you located?

  • #834
    Profile photo of Josh Hiemstra
    Josh Hiemstra
    Participant

    Our farm is southwest of Rosendale(the speed trap) in Fond du Lac county. We are in the upper Rock River watershed.

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