Buz Kloot

Buz Kloot

Mar 12, 2015

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Biomass, Tiller and Plant Tissue N Results

I finally took the time to compare tiller counts, biomass (dry basis) and plant tissue tests for our Feb 15 2015 sample date. A few notes here on the table (below):

  • 1.In the first row we just used ANOVA to compare plots 1-20 to 21-40 (which we are treating as two separate experiments anyway), but you can see for all three measurements Plots 1-20 are invariable better than Plots 21-40 - this has been borne in the field where we have seen lighter soils.
  • 2.In the second row, we compare treatments (TRT) separately for plots 1-20 and 21-40.
  • 3.For Tiller, we found significant differences between TRT 1 and 2 for plots 21-40 but no significant differences by treatment in Plots 1-20.
  • 4.For Biomass, we see significant differences between TRT 4 and 2 for Plots 1-20 but for plots 21-40, no significant differences were detected.
  • 5.Its interesting now to note that the ranking by tiller or biomass is similar in Plots 1-20 and we see a different order but similar correspondence for Plots 21-40. In all cases, tiller and biomass counts were the lowest for Treatment 2.
  • 6.For plant tissue N, we saw no significant difference between treatments. Here we see average N in TMT 4 is the highest in both Plots 1-20 and 21-40. I find it interesting that TRT 2 was consistently the lowest in terms of tillers and biomass, yet ranks 2
    nd
    in plant tissue N.
  • When we went to the field on March 6 the wheat outside the plots had already been top dressed and it is quite clear in the picture below. The adequacy range for N for wheat in this stage (Tillering) is 4%-5% N so the crop N is low without N fertilizer. Carl topdresses this week (with N fertilizer) and we'll see how things go. heres the pic of the field plots (not top dress) and the areas outside the Plots (Topdressed) - note the color differences.

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About This Project

We live in exciting times where commercial farmers are discovering the hope of healthy soils and they are using less commercial fertilizer than they would have imagined.

Our goal is to work with Carl Coleman, farmer from Dillon, SC to test how low we can go with commercial fertilizer as he grows a wheat crop this fall. This will be good for the farmer, his neighbors and for the environment.
Blast off!

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