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Improving corn nitrogen fertilizer recommendations for Ontario with rainfall effects on crop nitrogen demand

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dc.contributor.advisor Deen, Bill
dc.contributor.author Niemeyer, Caleb
dc.date.accessioned 2020-01-06T16:59:27Z
dc.date.available 2020-01-06T16:59:27Z
dc.date.copyright 2020-01
dc.date.created 2019-12-05
dc.date.issued 2020-01-06
dc.identifier.uri http://hdl.handle.net/10214/17720
dc.description.abstract To achieve maximum profitability while reducing negative environmental consequences, corn growers attempt to apply nitrogen (N) fertilizer close to the Maximum Economic Rate of N (MERN). MERN is highly variable and difficult to predict due to variation in net soil N supply and crop N demand which are both influenced by weather. Data from a ten year N response trial in Elora, Ontario were analyzed to study rainfall effects on MERN. Further historical weather and N response data from Elora and Ridgetown, Ontario were also collected. On these medium-textured soils, net soil N supply had little variation while crop N demand was variable. Rainfall accumulated from V5 to V12 was associated with increased yield, crop N demand and MERN. A rainfall adjustment to the current Ontario Corn N Calculator improved grower profitability by $54.86 ha-1 in a validation dataset, demonstrating potential to use in-season precipitation data to improve N management. en_US
dc.description.sponsorship International Plant Nutrition Institute, Grain Farmers of Ontario, OMAFRA, Food From Thought en_US
dc.language.iso en en_US
dc.rights Attribution-NonCommercial-ShareAlike 4.0 International *
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/ *
dc.subject Corn en_US
dc.subject Maize en_US
dc.subject Nitrogen en_US
dc.subject Fertilizer en_US
dc.subject Rainfall en_US
dc.subject Decision Support Tools en_US
dc.subject Ontario Corn N Calculator en_US
dc.title Improving corn nitrogen fertilizer recommendations for Ontario with rainfall effects on crop nitrogen demand en_US
dc.type Thesis en_US
dc.degree.programme Plant Agriculture en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Plant Agriculture en_US
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