Economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations

Abstract Canola (Brassica napus L.) is a highly valuable crop for Canada’s economy, making the efficient management of canola a priority. A field-scale study was conducted at ten sites between 2014 and 2016 to evaluate the viability of site specific nitrogen (N) management zones (MZ) based on analys...

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Autores principales:	Mohammad Khakbazan, Alan Moulin, Jianzhong Huang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fa038e92e6294de3931963c861d92ef2
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spelling	oai:doaj.org-article:fa038e92e6294de3931963c861d92ef22021-12-02T13:19:30ZEconomic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations10.1038/s41598-021-83917-32045-2322https://doaj.org/article/fa038e92e6294de3931963c861d92ef22021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83917-3https://doaj.org/toc/2045-2322Abstract Canola (Brassica napus L.) is a highly valuable crop for Canada’s economy, making the efficient management of canola a priority. A field-scale study was conducted at ten sites between 2014 and 2016 to evaluate the viability of site specific nitrogen (N) management zones (MZ) based on analysis of historical yield maps and soil test recommendations to improve canola productivity and profitability in western Canada. Treatments included factorial combinations of three canola yield zones (low, average, high) by four N rates, replicated four times at each site. The canola yield function had a quadratic form in each field but the effects of MZ varied between fields with positive effects in only a few fields. When ten site-years data were combined, MZ had positive effects on canola performance. On average, MZ of N fertilizer over ten fields generated between $28 to $65 ha−1 more net revenue (NR) relative to average yield management. Site-years, which reflect farm management and other farm characteristics had significant effects on yield and NR ranging from − $91 to $352 ha−1 compared to a baseline. Nitrogen application under MZs was only reduced by 8% compared to uniform rates. The potential for MZ does exist; however, its effectiveness is highly variable.Mohammad KhakbazanAlan MoulinJianzhong HuangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mohammad Khakbazan Alan Moulin Jianzhong Huang Economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations
description	Abstract Canola (Brassica napus L.) is a highly valuable crop for Canada’s economy, making the efficient management of canola a priority. A field-scale study was conducted at ten sites between 2014 and 2016 to evaluate the viability of site specific nitrogen (N) management zones (MZ) based on analysis of historical yield maps and soil test recommendations to improve canola productivity and profitability in western Canada. Treatments included factorial combinations of three canola yield zones (low, average, high) by four N rates, replicated four times at each site. The canola yield function had a quadratic form in each field but the effects of MZ varied between fields with positive effects in only a few fields. When ten site-years data were combined, MZ had positive effects on canola performance. On average, MZ of N fertilizer over ten fields generated between $28 to $65 ha−1 more net revenue (NR) relative to average yield management. Site-years, which reflect farm management and other farm characteristics had significant effects on yield and NR ranging from − $91 to $352 ha−1 compared to a baseline. Nitrogen application under MZs was only reduced by 8% compared to uniform rates. The potential for MZ does exist; however, its effectiveness is highly variable.
format	article
author	Mohammad Khakbazan Alan Moulin Jianzhong Huang
author_facet	Mohammad Khakbazan Alan Moulin Jianzhong Huang
author_sort	Mohammad Khakbazan
title	Economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations
title_short	Economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations
title_full	Economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations
title_fullStr	Economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations
title_full_unstemmed	Economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations
title_sort	economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fa038e92e6294de3931963c861d92ef2
work_keys_str_mv	AT mohammadkhakbazan economicevaluationofvariableratenitrogenmanagementofcanolaforzonesbasedonhistoricalyieldmapsandsoiltestrecommendations AT alanmoulin economicevaluationofvariableratenitrogenmanagementofcanolaforzonesbasedonhistoricalyieldmapsandsoiltestrecommendations AT jianzhonghuang economicevaluationofvariableratenitrogenmanagementofcanolaforzonesbasedonhistoricalyieldmapsandsoiltestrecommendations
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Economic evaluation of variable rate nitrogen management of canola for zones based on historical yield maps and soil test recommendations

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