Oakes Irrigation Research Site |
Carrington
Research Extension Center * North Dakota State University |
P.O. Box 531,
Oakes, ND 58474-0531, Phone: (701) 742-2744, FAX: (701) 742-2700, E-mail: |
Blaine.Schatz@ndsu.edu |
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Leonard.Besemann@ndsu.edu |
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Strip-Till, Corn
on Soybean, Nitrogen Rate Study |
L. Besemann and H.
Eslinger |
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The objective of
this study was to compare corn yields of a corn/soybean rotation to those in
a companion corn/corn rotation and to find differences in N response and
other agronomic measurements in no-till rotations, utilizing strip-till. |
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MATERIALS AND
METHODS |
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Soil: |
Embden sandy loam, Embden loam, Gardena loam and Maddock sandy
loam; pH=7.1; 1.6% organic matter; Soil N average 12 lbs/acre; soil-P
and soil-K was very high; soil-S was medium. |
Previous Crop: |
2013 – soybean. |
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Seedbed preparation: |
Strip-till May 9 with an
Orthman strip-till machine. |
Hybrid: |
Pioneer P9917AMX |
Planting: |
Planted May 18 @ 33,000 plants per acre in 30-inch rows. |
Plots: |
Plots were 37 ft long by 15 ft (6 rows) wide. There were four replications. |
Fertilizer: |
All plots received 10 lbs
N/acre as 10-34-0 via strip-till May 9.
Stream‑bar all plots with 10 lbs N/acre and 23 lbs S/acre as
12‑0-0-26 May 22. Stream-bar 79
lbs N/acre as 28-0-0 to the 100 lb treatment and 44 lbs N/acre as
28‑0-0 to the 100D, 150 and 200 lb treatments May 23. Sidedress N treatments as 28‑0-0
(three inches deep) June 17; 200 lb treatments received 135 lbs N/acre,
the 150 lb treatment received 85 lbs N/acre and the 100D received 35 lbs
N/acre. |
Irrigation: |
Overhead sprinkler irrigation as needed. |
Pest control: |
Harness (2 pt/acre) May 22, Laudis (3 oz/acre) + AAtrex 9-O (0.5 lb ai/acre) + Destiny
(0.05%v/v) + AMS (1½ lbs/acre) June 3. |
Remote sensing: |
Remote sensing was achieved
with an Opti-Sciences CCM 200 Plus chlorophyll meter and a Holland Crop
Circle ACS active canopy sensor (normalized difference red edge – NDRE). |
Harvest: |
Hand harvest October 16. Harvest
area was the two center rows from each plot (72 feet of total row). |
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RESULTS |
Determining nitrogen sufficiency in
time is important to achieve N efficiency.
Remote sensing utilizing a Holland Crop Circle ACS 430 active canopy
sensor (normalized difference red edge – NDRE) and an Opti-Science CCM 200
chlorophyll meter were tested to determine ability to measure N
sufficiency. |
Increasing nitrogen
rates (N) increased grain yield, chlorophyll meter readings and normalized
difference red edge (NDRE). Remote
sensing by chlorophyll meter and the Crop Circle Sensor did well in
predicting corn N status. |
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Table 1. Strip-till, corn on soybean nitrogen rate
study at the Oakes Irrigation Research Site in 2014. |
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Grain |
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Chlorophyll |
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Fertilizer |
Grain |
Yield |
Harvest |
Test |
Meter |
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Nitrate-N |
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Seed |
Seed |
Seed |
Emerge |
Silk |
Mature |
N Rate |
Yield1 |
2009-14 |
Moisture |
Weight |
Reading2 |
NDRE3 |
Stalk |
Fall Soil |
Population |
Protein |
Oil |
Starch |
Date |
Date |
Date |
lb/acre |
bu/ac |
bu/ac |
% |
lb/bu |
4-Aug |
4-Aug |
ppm |
lbs/ac |
plants/ac |
----------%----------- |
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22 |
108.3 |
125.9 |
16.3 |
53.0 |
11.7 |
0.1859 |
35 |
11 |
35142 |
6.4 |
2.3 |
75.7 |
25-May |
23-Jul |
21-Sep |
100 |
141.9 |
177.8 |
15.9 |
52.5 |
21.6 |
0.2719 |
52 |
11 |
35025 |
6.7 |
2.1 |
75.6 |
25-May |
22-Jul |
19-Sep |
100d |
179.5 |
192.3 |
16.5 |
53.5 |
34.6 |
0.2942 |
14 |
11 |
35436 |
7.4 |
2.1 |
75.3 |
25-May |
21-Jul |
19-Sep |
150 |
207.2 |
223.7 |
17.0 |
54.3 |
43.9 |
0.3052 |
100 |
11 |
35967 |
8.2 |
2.3 |
74.6 |
25-May |
21-Jul |
19-Sep |
200 |
226.6 |
234.5 |
15.8 |
54.7 |
49.7 |
0.3332 |
258 |
15 |
35849 |
8.5 |
2.3 |
74.2 |
25-May |
21-Jul |
18-Sep |
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Mean |
172.7 |
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16.3 |
53.6 |
32.3 |
0.2781 |
91.7 |
11.8 |
35484 |
7.4 |
2.2 |
75.1 |
25-May |
21-Jul |
19-Sep |
C.V. % |
4.6 |
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8.2 |
1.0 |
8.9 |
9.96 |
137.8 |
25.5 |
2.0 |
3.4 |
10.1 |
0.6 |
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0.7 |
0 |
LSD
0.10 |
10.1 |
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NS |
0.7 |
3.6 |
0.0349 |
NS |
NS |
NS |
0.3 |
NS |
0.6 |
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0.6 |
0.5 |
LSD
0.05 |
12.4 |
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NS |
0.9 |
4.5 |
0.0427 |
NS |
NS |
NS |
0.4 |
NS |
0.7 |
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0.8 |
0.6 |
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Planting Date =
May 10; Harvest Date = October 16; Previous Crop = Soybean |
1 Yield adjusted to 15.5% moisture. |
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2 Opti-Science CCM 200. |
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3 Holland Crop Circle ACS active canopy sensor (normalized
difference red edge) - NDRE. |
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Oakes Irrigation
Research Site |
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Variety trials |
Crop
index |
Home
page |
Report
2014 |
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Other corn Studies
2014 |
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Corn hybrid performance trial -
dryland |
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Corn hybrid performance trial -
irrigated |
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Strip-till continuous corn N-rate |
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Stover removal corn/corn and
corn/soybean rotation |
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