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Published byMaude Allison Modified over 9 years ago
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Corn Plot Overview Jared Shippey Ben Logan
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General Information Planted 5/30/08 Hybrid – Pioneer 38B87 – 94 days Planted population 35,000 Manure application Fall 6000 gal/ac surface applied Spring 6000 gal/ac surface applied Field has long term manure history Previous crop – Corn silage w/ rye cover crop
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Tillage Plots Treatments – Plot 1: Spring chisel Plot 2: Spring turbo-till Plot 3: No-till Fertility program – 18 gal/ac 7-21-6 as starter 30 gal/ac 30% UAN banded at planting
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Yield Results Yield checks on 9/10/08 Spring chisel 13.5 tons/ac Spring turbo-till 15.0 tons/ac No-till 16.0 ton/ac All yield data adjusted to 70% moisture
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Economic Analysis Corn Silage $40/ton Revenue – Chisel - $540/ac Turbo-Till - $600/ac No-Till - $640/ac
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Economic Analysis Tillage and Planting costs per acre Chisel – $48.50/ac Turbo-Till – $32.60/ac No-Till – $18.20 Figures taken from NASS 2008 PA Custom Machinery Rates
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Economic Analysis Net Return To Tillage Chisel – $491.50 Turbo-Till – $567.40 No-Till – $621.80
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Fertility Plots All plots were no-tilled Treatments Plot 4: Myer’s tradition fertility program Plot 5: Starter and manure only Plot 6: Manure only Plot 7: Tradition fertility program plus Avail
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Myer’s Tradition Fertility Starter: 18 gal 7-21-6 banded 2x2 off row Nitrogen: 30 gal UAN banded w/ planter 6000 gal manure fall applied 6000 gal manure spring applied All manure surface applied on rye cover crop Total fertilizer app. 108-40-11
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Starter and Manure Starter: 18 gal 7-21-6 banded 2x2 off row 6000 gal manure fall applied 6000 gal manure spring applied All manure surface applied on rye cover crop Total fertilizer app. 13-40-11
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Manure 6000 gal manure fall applied 6000 gal manure spring applied All manure surface applied on rye cover crop
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Tradition Fertility w/ Avail Starter: 18 gal 7-21-6 banded 2x2 off row w/ Avail Nitrogen: 30 gal UAN banded w/ planter 6000 gal manure fall applied 6000 gal manure spring applied All manure surface applied on rye cover crop Total fertilizer app. 108-40-11
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Yield Results Plot 4: Myer’s fertility program – 16.0 tons Plot 5: Starter & manure – 14.8 tons Plot 6: Manure only – 12 tons Plot 7: Myer’s fertility plus Avail – 11.4 tons All yield data adjusted to 70% moisture
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Economic Analysis 30% UAN est. $0.70/lb of N = $420/ton Difference between Starter & UAN and Starter only was 1.2 tons of yield with a value of $48.00 Cost of nitrogen to get addition 1.2 tons of yield was $66.50
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Summary Yield difference between Avail plot and other plots with same fertility program was mostly related to soil productivity difference No-tilled plots tolerated dry August conditions better than tilled plots Abundant manure history can provide majority of crop P & K needs
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