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rebuilder

Posted 12/12/2017 15:01 (#6424158)
Subject: N-serve SIDE DRESSED year 3 plot results......long post

Bourbon,Indiana

First... here are the last 2 years posts to bring some of you up to speed about how & why I am doing this:

Year 1: http://talk.newagtalk.com/forums/thread-view.asp?tid=591744&posts=40#M4901698

Year 2: https://talk.newagtalk.com/forums/thread-view.asp?tid=679160&posts=39#M5751488

I had planned on having four different plots again this year with four different varieties, and in two different covercrops (rye, and ARG) along with straight no-till. Due to conditions this year I was unable to get my NH3 put on the rye and had to come in with a UAN application very late. So that planned plot was thrown out. Plot 1 is a long term cover crop field of ARG. There was a lot of winterkill this year, so in the planting pics you will notice I don't have a very even stand of ARG. Plots 2 & 3 are long term no-till (more than 30 years). All 3 plots are long term 100% no-till fields in a corn-soy-corn rotation. All 3 plots are within 1 mile of each other.

On all 3 plots I used starter fertilizer--2x2 and consists of=> 30#N / 35.2#P / 8.3#S / 1 qt Zinc.

N-serve I applied a 2/3 rate (0.67 qt ) {see year 1's post about why I use a 2/3 rate}.

Plot 1 had 100# AMS spread prior to planting to allow for the ARG, 30# N via starter, and 115#N via NH3 ( I reduced the NH3 rate to account for the earlier 21#N from the AMS) for a total applied N of 166#.

Plots 2&3 had just the 30# of starter, then 136#N from NH3.

This means ALL THREE PLOTS received the same amount of applied N: 166#

All 3 plots were planted as a whole... no changes of variety of rate in any one plot. N-serve swaths were flagged (every other 20' swath ).

Now for the data....I will expand on rainfall etc in my conclusion.

Plot 1 planting: planted May 8th, to Beck's 5234AMX(102 day )@ 32,000 population. This variety has a LOW response to higher Nitrogen applications ( it has a high NUE-Nitrogen use efficiency).

Plot 1 side dress: June 4th

Plot 1 Fungicide: August 2nd for GLS pressure

Plot 1 harvest: October 27/28. Out of 53 acres with alternating swaths of bare NH3 vs N-serve, I chose 6 random reps along the field. Field length is 1793' and 1/2 round was made for each rep to total 0.823 acres / rep. Results below are in bushels per acre.

Plot 1 data: pounds moisture T.W. corrected Bu. N-serve advantage

Rep 1 N-serve 10320 18.3 58.0 216.50 2.49

Rep 1 Bare 10140 17.8 57.5 214.01

Rep 2 N-serve 10175 17.8 58.9 214.75 10.06

Rep 2 Bare 9710 17.9 58.3 204.69

Rep 3 N-serve 10010 17.8 58.1 211.27

Rep 3 Bare 10100 17.6 58.4 213.69 -2.42

Rep 4 N-serve 10060 17.6 59.3 212.84 6.84

Rep 4 Bare 9760 17.8 58.3 206.0

Rep 5 N-serve 10215 17.5 59.4 216.39

Rep 5 Bare 10280 17.4 58.7 218.03 -1.64

Rep 6 N-serve 10005 17.2 58.3 212.72 0.76

Rep 5 Bare 9910 16.7 58.7 211.96

Plot 1 conclusion: N-serve gained bushels this plot. N-serve reps were 2.68 Bu/a higher on average. I was able to visually pic out the N-serve reps at harvest, as the plant tops were standing better than the bare reps in this field. Also.... this field had q substantial amount of greensnap from a July storm which you will notice in the harvest pics.

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Plot 2 planting: planted May 9th, to Beck's 6225 RR(112 day ) @ 32000 population. This variety has a HIGH response to higher Nitrogen applications, so a low NUE

Plot 2 side dress: June 9th

Plot 2: August 2nd, fungicide applied at tassel for GLS

Plot 2 harvest: November 14. Out of 44 acres with alternating swaths of bare NH3 vs N-serve, I chose 5 random reps along the field. Field length is 1429' and 1/2 round was made for each rep to total 0.656 acres / rep. Results below are in bushels per acre.

Plot 2 data: pounds moisture T.W. corrected Bu. N-serve advantage

Rep 1 N-serve 8820 20.5 58.8 225.90 2.77

Rep 1 Bare 8690 20.3 58.7 223.13

Rep 2 N-serve 8870 20.5 59.4 227.17 3.02

Rep 2 Bare 8730 20.3 58.6 224.15

Rep 3 N-serve 8760 20.4 59.3 224.62

Rep 3 Bare 8805 20.6 58.8 225.20 -0.58

Rep 4 N-serve 9005 20.8 59.1 229.74

Rep 4 Bare 8980 20.2 58.7 230.84 -1.10

Rep 5 N-serve 8735 20.3 59.4 224.28

Rep 5 Bare 8780 20.2 58.9 225.70 -1.42

Plot 2 conclusion: N-serve lost with this plot...but not by much. Loss was 0.538 Bu/a on average. This is a pattern tiled field, but we had a LOT of rain. So there were spots of drowned out corn in the lowest areas. What surprised me was, with a Nitrogen loving variety, I expected the N-serve to stick out, especially as we headed into higher, lighter, ground. The reps started in the lower ground as soon as long as there were no bare spots, and reps 4/5 were in lighter soils.

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Plot 3 planting: planted May 10, to Beck's 5828(110 day ) @ 34,200 population. This variety has a low response to N (high NUE)

Plot 3 side dress: June 13th

Plot 3 harvest: October 28: Out of 15 acres with alternating swaths of bare NH3 vs N-serve, I chose 4 random reps along the field. Field length is 1168' and 1/2 round was made for each rep to total 0.536 acres / rep. Results below are in bushels per acre.

Plot 3 data: pounds moisture T.W. corrected Bu. N-serve advantage

Rep 1 N-serve 7050 19.3 58.4 224.31 2.71

Rep 1 Bare 7000 19.7 58.0 221.60

Rep 2 N-serve 7410 19.4 57.1 235.47 6.98

Rep 2 Bare 7190 19.4 57.6 228.49

Rep 3 N-serve 7490 18.8 57.8 239.78 5.06

Rep 3 Bare 7350 19.0 58.0 234.72

Rep 4 N-serve 7720 19.2 58.1 245.95 7.17

Rep 4 Bare 7505 19.3 58.0 238.78

Plot 3 conclusion: On the obvious plus side for N-serve with this plot. N-serve advantage was 5.48 Bu/a on average. Finally making some money over and above the cost of N-serve.

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General conclusion: Rainfall was a big factor this year. Rainfall totals:

February - 2.6"

March - 4.16"

April - 4.19"

May - 6.42"

June - 4.04"

July - 9.32"

August - 2.53"

September-1.45"

October - 3.72"

November-10.24"

Total for 2017: 48.67"

Our average rainfall for this area is in the mid 30's to put that in perspective. I believe our July was the wettest on record. So, I had high confidence that the N-serve reps would stick out, although I thought they would stick out more like Plot 3 with a 5 Bushel advantage.

Any way.... this is my last year putting this test out. Bottom line, I will probably NOT be adding N-serve to my side dress NH3 applications at this time. However, if price points change, or we have generally wetter weather (here), or if they start tightening up regulations on Nitrogen applications for farmers to improve water quality.....I will have no problems adding N-serve in, as I think I have proved (to myself at least), that it can improve yields enough to be viable.

....and NO cainfarmer, before you even ask.....I did not get last years N-serve reps put to beans measured this year to see if N-serve affects beans the following year. I had planned on it, but weather, and lack of help left that for someone else to prove or disprove. Maybe next year? We'll see. Interesting concept though. Enjoy

rebuilder