1/7/2020 2019 NW Iowa Research Farm and On-Farm Project Results 2020 Crop Advantage Series Joel DeJong, ISU Extension Field Agronomist Andrew Weaver, On-farm coordinator, NW Research Farm Landon Lenhart, Ag Specialist/Water Quality, NW Research Farm http://farms.ag.iastate.edu/content/northwest-research-and- demonstration-farm NW Research Farm(s) • Owned by the Northwest Iowa Experimental Association that was formed in the 1950’s. • 280 acres in O’Brien County • 55 acres in Lyon County • Board meets annually to discuss farm progress, research, and future outlook. • 2019 - conducted 38 research projects -conducted 35 on farm projects -held 10 field days with over 1471 visitors Expected nitrate reduction: about 40% Expected lifespan of woodchips: 15 – 20 years Costs? 1
1/7/2020 Flow Monitoring System Treatments Replicated subsurface drainage plots to evaluate performance of various in-field management practices Nitrogen Treatment Nitrogen Application Tillage Application Rate Number Time (lb N/acre)* NWRF Drainage NERF Drainage 1 Conventional tillage* Fall (anhydrous 135 Gilmore City DRF ammonia with nitrapyrin)** 2 Conventional tillage Spring (anhydrous 135 ammonia) 3 Conventional tillage Split with variable N at 135 COBS sidedress (40 lb/acre of urea 2x2 starter at planting plus in-season agrotain treated urea) SERF Drainage 4 Conventional tillage None 0 * Fall chisel corn stalks with spring disk/field cultivate, and spring disk/field cultivate soybean stubble. **In fall of 2014 freezing conditions occurred early and prevented fall application. Application occurred in early spring 2015. Corn Yield Subsurface Drainage Layout – 250 250 a a a 2015 2017 Corn Yield (bu/acre) a a Corn Yield (bu/acre) b b 200 200 Established 2013 150 150 c 100 100 (32 Individually 50 50 0 0 Drained Plots) Fall N Spring N Split N No N Fall N Spring N Split N No N 250 250 2016 a 2018 a a a a a Corn Yield (bu/acre) Corn Yield (bu/acre) 200 200 b 150 150 b 100 100 50 50 0 0 Fall N Spring N Split N No N Fall N Spring N Split N No N *Means with the same letter in the same year are not significantly different, P =0.05. 2
1/7/2020 White mold reference Soybean Yield 1. Available on line the 6 page full color publication CPN 5001, “ Pesticide Impact on White Mold and Soybean Yield” 80 80 https://cropprotectionnetwork.org/ Soybean Yield (bu/acre) Soybean Yield (bu/acre) 2015 2017 60 60 40 40 20 20 0 0 N N N N N N N N l g t o l g t o a l n l i N a l n l i N F p F p i r S i r S p p S S 80 80 Soybean Yield (bu/acre) 2016 Soybean Yield (bu/acre) 2016 2018 60 60 40 40 20 20 0 0 N N N N N N N N l l g i t o g o a n p l N a l l i t F i n p l N p r S F i S p r S S *Means with the same letter in the same year are not significantly different, P =0.05. 18 Nitrate-N Conc. (mg/L) Corn Phase - 2015-2018 16 Apps for White Mold a ab 14 Flow-weighted 12 dc de 10 8 6 • Sporecaster Sporebuster 4 2 Flow-weighted 0 N N N N Nitrate-N l l g t i o a n l N p F i r S p S Concentration 18 Nitrate-N Conc. (mg/L) Soybean Phase - 2015-2018 16 ab 14 Flow-weighted bc 12 dc 10 e 8 White mold in 2019? I could use your help. 6 4 Location, date of planting, variety or 2 *Means with the same letter maturity of bean . 0 in the same year are not Fall N Spring N Split N No N significantly different, P =0.05. Analyzed across corn and soybean phase Rootworm Trait Trial, 2019. Yield from 2018 White Mold Soybean Fungicide Trial. Treatment Yield (Bu/ac.) NK 1284-5222 (SmartStax) with Force 3G T-band at 4 oz/1,000 feet of row 181.3 County/ Trial Treatment Yield (Bu/ac.) NK 1284-5222 (SmartStax) 171.5 Row space NK 1284-3000 (VT3) with Force 3G T-band at 4 oz/1,000 feet of row 184.0 Sioux 1 Endura 2X 80.9 NK 1284-3000 (VT3) 177.1 30”, s/c NK 1284-GT (Conventional) with Force 3G T-band at 4 oz/1,000 feet of row 184.5 Aproach Prima 2X 80.3 NK 1284-GT (Conventional) 170.3 Endura f/b Aproach Prima 81.9 Treatment Root Rating Control 69.6 NK 1284-5222 (SmartStax) with Force 3G T-band at 4 oz/1,000 feet of row 0.10 NK 1284-5222 (SmartStax) 0.36 NOTES: * Long white mold history on this field NK 1284-3000 (VT3) with Force 3G T-band at 4 oz/1,000 feet of row 0.12 • All applied at 8 oz/a NK 1284-3000 (VT3) 0.52 • First treatment at R-1, second 8 days later. NK 1284-GT (Conventional) with Force 3G T-band at 4 oz/1,000 feet of row 0.26 NK 1284-GT (Conventional) 0.83 3
1/7/2020 Lyon County Corn Rootworm Insecticide Trials 2019, 2018, 2017 Corn/Corn, 22” row spacing. Quad stack hybrids. Year Treatment Yield P- (Bu/ac.) value 2019 Aztec HC at 1.6 oz/1000 ft of row 176.6 No rootworm insecticide 172.4 2018 Aztec HC at 0.8 oz/1000 ft of row 220.1 No rootworm insecticide 220.1 2017 Aztec HC at 0.6 oz/1000 237 a 0.04 No rootworm insecticide 231 b 2017 Aztec HC at 0.6 oz/1000 217 a 0.21 No rootworm insecticide 215 a 19 Rootworm Trait Trial, 2018. Corn Row Spacing Research Treatment Yield (Bu/ac.) NW Research Farm 2019 Agrisure N85-5222 (SmartStax) with Force 3G T-band at 4 oz/1,000 feet of row 189.2 Agrisure N85-5222 (Smartstax) 184.5 Two Wyffels hybrids Agrisure N85-3111 (VT3) with Force 3G T-band at 4 oz/1,000 feet of row 203.5 Agrisure N85-3111 (VT3) 188.4 Agrisure N85-GT (Conventional) with Force 3G T-band at 4 oz/1,000 feet of row 200.4 Agrisure N85-GT (Conventional) 166.6 Treatment Root Rating Agrisure N85-5222 (SmartStax) with Force 3G T-band at 4 oz/1,000 feet of row 0 .17 Agrisure N85-5222 (Smartstax) 0.60 Agrisure N85-3111 (VT3) with Force 3G T-band at 4 oz/1,000 feet of row 0.15 Agrisure N85-3111 (VT3) 0.68 “In 2019, this was the most consistent and higher advantage of 20-inch rows Agrisure N85-GT (Conventional) with Force 3G T-band at 4 oz/1,000 feet of row 0.28 compared to trials from 2015-2019. “, Mark Licht, NWRF Annual Report. Agrisure N85-GT (Conventional) 1.13 23 Rootworm Trait Trial, 2017. Corn Row Spacing Research Treatment Yield P-value NW Research Farm 2019 (Bu/ac.) Agrisure N85-5222 (SmartStax) with Force 3G T-band at 4 oz/1,000 feet of row 200 ab Agrisure N85-5222 (Smartstax) 189 b <0.01 Two Pioneer hybrids Agrisure N85-3111 (VT3) with Force 3G T-band at 4 oz/1,000 feet of row 212 a Agrisure N85-3111 (VT3) 192 b Agrisure N85-GT (Conventional) with Force 3G T-band at 4 oz/1,000 feet of row 190 b Agrisure N85-GT (Conventional) 140 c Treatment Root P-value Rating Agrisure N85-5222 (SmartStax) with Force 3G T-band at 4 oz/1,000 feet of row 0.4 d <0.01 Agrisure N85-5222 (Smartstax) 1.3 bc Agrisure N85-3111 (VT3) with Force 3G T-band at 4 oz/1,000 feet of row 0.6 cd Agrisure N85-3111 (VT3) 1.7 ab Agrisure N85-GT (Conventional) with Force 3G T-band at 4 oz/1,000 feet of row 0.8 cd Agrisure N85-GT (Conventional) 2.2 a 24 4
1/7/2020 Corn Row Spacing Research 2017 Soybean NW Research Farm 2019 Row Spacing Trial • Lyon County, Strip-till, planted 5/10, 140K, following Two DeKalb hybrids corn, 3 reps. • 30” rows averaged 66 bu/acre • 15” rows averaged 61.7 bu/acre • NOTE: Significant white mold in this plot 25 28 Soybean row spacing trials – Soybean Row Spacing Research NW Research Farm 2019 ’08 – ‘14 • 14 trials 15” v. 30” Two Corteva Varieties – 15” average = 60.64 bu/a – 30” average = 58.24 bu/a • 5 of 14 showed at least a 3+ bu/a increase with narrow rows. • 8 trials 18” v. 36” – 18” average = 59.99 bu/a – 36” average = 55.61 bu/a • 5 of 8 showed at least a 3+ bu/a increase with narrow rows. 26 29 2019 Soybean Population Trials Soybean Row Spacing Research • Sioux County, no-till, planted 5/14/19. 30” rows NW Research Farm 2019 90K = 61.2 bu/a 110K = 60.9 bu/a Two Bayer Varieties 125K = 61.1 bu/a 140K = 61.6 bu/a • Lyon County, no-till, planted 4/26/19, 30” rows, 1.7 bean 100K = 70.6 bu/a 125K = 71.8 bu/a 165K = 71.6 bu/a • Lyon County, no-till, planted 4/26/19, 30” rows, 2.4 bean 100K = 66.3 bu/a 125K = 66.3 bu/a 165K = 69.2 bu/a • Lyon County, no-till, planted 5/16/19, 30” rows, 1.7 bean 100K = 73.2 bu/a 125K = 73.4 bu/a 165K = 73.3 bu/a • Lyon County, no-till, planted 5/16/19, 30” rows, 2.4 bean 100K = 67.9 bu/a 125K = 69.4 bu/a 165K = 70.1 bu/a At $60/bag, 140K seeds/bag, 20,000 seeds cost $8.57. 27 30 5
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