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:

Strip-Till, Soybean on Corn Study

K. Cooper, L. Besemann and H. Eslinger

MATERIALS AND METHODS

Soil:

Embden sandy loam, Hecla sandy loam and Maddock sandy loam; pH = 7.5; 2.8% organic matter; soil N was 3 lbs/acre; soil P and soil K were very high; soil S was low.

Previous crop:

2016 - field corn.

Seedbed preparation:

Strip-till May 5 with an Orthman strip-till machine.

Hybrid:

Pioneer P11T22R2.

Planting:

May 10 @ 158,000 seeds per acre in 30-inch rows.

Fertilizer:

All plots received 12 lbs N/acre and 40 lbs P₂O₅/acre as 10-34-0 via strip-till May 5.

Irrigation:

Overhead sprinkler irrigation as needed.

Pest control:

Authority (19 oz/acre) + Interlock (6 oz/acre) May 12, Roundup (32 oz/acre) + AMS (10 lb/100 gal) + NIS (1 pt/100 gal) + Interlock (4 oz/acre) May 31, Roundup (48 oz/acre) + AMS (10 lbs/100 gal) + NIS (1 pt/100 gal) + Interlock (4 oz/acre) July 14.

Harvest:

Harvested September 29 with an Almaco plot combine. Harvest area was four rows 97 ft long (two two row passes the entire length of the study).

RESULTS

The soybean yield was 60.9 bu/acre at 13.0% moisture with a test weight of 58.1 lbs/bu. The soybeans looked good overall with some white mold present in isolated spots which was expected because no fungicide was applied.

Oakes Irrigation Research Site