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
									Leonard.Besemann@ndsu.edu
Soybean Variety Trial
L. Besemann and H. Eslinger
Two soybean variety trials were conducted at the Oakes Irrigation Research Site; a Roundup Ready@ trial and a Liberty Link trial.  Results for the Roundup Ready trial are listed in Table 1.  Results for the Liberty Link trial are listed in Table 2.  There were forty-six varieties in the Roundup Ready trial and ten varieties in the Liberty Link trial.
MATERIALS AND METHODS
Soil:	Embden loam and Egeland loam; pH = 7.3; 1.8% organic matter; soil N 25 lbs/acre; soil P and soil K were very high; soil S was high.
Previous crop:	2014 – field corn.
Seedbed preparation:	Spring conventional tillage.
Planting:	Planted May 20 in 30-inch rows.
Plots:	Plots were 17 ft long by 5 ft (2 rows) wide.  The study had four replications.
Fertilizer:	Broadcast 8 lbs N/acre, 42 lbs P2O5/acre, 48 lbs K2O/acre and 10 lbs S/acre as 9‑21‑24-6 April 13.
Irrigation:	Overhead sprinkler irrigation as needed.
Pest control:	The Liberty Link and Roundup Ready soybean both received: Trust (1 pt/acre) May 19 weed control; Endura (8 oz/acre) July 8, Proline (5 oz/acre) July 23 controlled disease.  Kendo (3 oz/acre) August 11 controlled insects.                                                                                                                                        Additional weed control: Liberty Link soybeans received Liberty (34 oz/acre) + AMS (1.5 lb/10 gal) June 18, Liberty (28 oz/acre) + AMS (1.5 lb/10gal) June 30.  The Roundup Ready soybeans received Roundup (30 oz/acre) + AMS (1 lb/10 gal) June 18, Roundup (20 oz/acre) + AMS (1 lb/10gal) June 30.
Harvest:	October 8 with a plot combine.
RESULTS
Yields in the Roundup Ready trial averaged 77.9 bu/acre.  Yields in the Liberty Link trial averaged     74.4 bu/acre.
Table 2. Soybean variety trial (Liberty Link) at the Oakes Irrigation Research Site 2015.
		Mat	Days to	Plant	Plant	Seeds/	Seed		Test	Yield
Brand	Variety	Group1	PM	Ht	Lodge2	Pound	Oil	Protein	Wt	2015
				inch	0 to 9		%	%	lb/bu	bu/ac
Credenz	CZ 0121LL	0.1	117.0	31.0	0.3	2395	19.4	33.4	55.8	67.1
Credenz	CZ 0525LL	0.5	117.0	36.0	0.8	2333	19.3	34.6	56.4	74.5
Credenz	CZ 0848LL	0.8	119.3	41.0	0.0	2456	18.9	34.6	56.6	71.9
Credenz	CZ 1332LL	1.3	122.0	40.8	0.5	2232	18.2	35.0	57.2	83.3
Credenz	CZ 1623LL		125.0	40.0	2.3	2803	18.1	35.5	57.5	69.9
Credenz	CZ 1845 LL		129.8	32.5	5.5	3170	18.4	34.6	56.3	71.6
NuTech Seed	2086L	0.8	118.5	41.3	0.0	2556	19.0	34.3	56.5	73.6
NuTech Seed	3103L	1.0	123.8	34.8	2.8	2459	19.1	34.5	56.3	74.5
NuTech Seed	3126L	1.2	123.3	42.5	0.8	2184	18.2	35.1	56.9	83.7
Thunder	5411LLN	1.1	123.0	30.8	2.8	2394	19.1	34.5	56.1	73.7
	Mean		121.9	37.1	1.6	2498	18.8	34.6	56.6	74.4
	C.V. (%)		0.9	7.0	76.5	4.0	1.0	1.0	0.8	4.3
	LSD 0.10		1.4	3.1	1.4	119	0.2	0.4	0.6	3.8
	LSD 0.05		1.7	3.8	1.7	144	0.3	0.5	0.7	4.6
Planting Date = May 20; Harvest Date = October 8; Previous Crop = Field corn
1 Maturity group based on data provided by seed company.
2Plant Lodge: 0 = no lodging; 9 = plants lying flat.
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