Intensive versus low-input corn trial conducted

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DuPont Pioneer conducted a comparative corn yield performance study using a system of aggressive soil fertility and pest management practices with a more conventional low-input system during 2012 that showed the intensive management and appropriately matched seed had an advantage.

Study Description

Planting Date:

May 12, 2012


Johnston, Iowa

Plot Layout:

Four 10 x 17.4 ft plots per entry

Pioneer Hybrids:

P1420HR (HX1,LL,RR2), P1498HR (HX1,LL,RR2)


32,000 and 38,000 plants/acre

Intensive Management System: Fertility program consisted of 180 lbs/acre N preplant + 50 lb/acre sidedress N applied at V6 growth stage, 120 lbs/acre P2O5, 30 lbs/acre sulfur, 3 lbs/acre zinc applied as MicroEssentials SZ; Seed Treatment was PPST Poncho 1250 + Votivo; and Foliar fungicide/insecticide application was Aproach Prima (6.8 oz/acre) + Prevathon (20 oz/acre)

Conventional Management System : Fertility program: 180 lbs/acre N preplant and seed treatment: PPST 250


  • The Johnston farm experienced significant drought and heat stress in 2012. This study received a limited amount of irrigation (approximately 3 inches) on all plots, but not enough to eliminate drought stress as a yield-limiting factor.
  • The two hybrids compared in the study included an Optimum AQUAmax hybrid (P1498HR) and a comparative hybrid of similar maturity (P1420HR) with lower drought tolerance. The average yield of the Optimum AQUAmax hybrid was 27 bu/acre greater than that of the comparative hybrid.
  • Average yield of both hybrids was slightly greater at 38,000 plants/acre than at 32,000 plants/acre.
  • Intensive management practices increased average yield 33 bu/acre with P1420HR and 9 bu/acre with P1498HR.
  • The greatest overall average yield (216.5 bu/acre) was achieved with P1498HR at 38,000 plants/acre in the intensive management system. P1420HR at 32,000 plants/acre in the conventional system had the lowest yield (165.5 bu/acre).

Graphs pulled from website:

HX1 = Contains the Herculex I Insect Protection trait for resistance to corn borer, LL = LibertyLink gene, RR2 = Roundup Ready Corn 2 gene,  PPST = Pioneer Premium Seed Treatment.


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December, 03, 2012 at 09:08 PM

Winfield has done the study at the answer plots for years.! Nothing new here

Bob Strasner    
Mount Hope, KS  |  December, 04, 2012 at 09:46 AM

I agree with the above comment except I would add that there are many more experiments, over many more years, in a greater number of environments and with a larger number of varieties and maturities at the Winfield Answer Plots. You are also taken to the Answer Plots at key growth periods to see how the various treatments are affecting corn and soybean growth. If you haven't been to an Answer Plot, you are really missing the boat. Bob Strasner Agronomist Andale Coop

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