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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 Niemeyer, Caleb 2020-01-06T16:59:27Z 2020-01-06T16:59:27Z 2020-01 2019-12-05 2020-01-06
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 *
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 Plant Agriculture en_US Master of Science en_US Department of Plant Agriculture en_US
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Attribution-NonCommercial-ShareAlike 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 4.0 International