D. Puurveen
University of Alberta
15 Papers
77 Citations
D. Puurveen is an academic researcher from University of Alberta. The author has contributed to research in topics: No-till farming & Tillage. The author has an hindex of 7, co-authored 12 publications.
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Papers
Long-term tillage, straw and N rate effects on quantity and quality of organic C and N in a Gray Luvisol soil
TL;DR: In this paper, a field experiment with a barley (Hordeum vulgare L.)-wheat (Triticum aestivum L.) and canola (Brassica napus L.) rotation was conducted on a Gray Luvisol (Typic Cryoboralf) loam soil at Breton, Alberta, Canada.
Long-term tillage, straw and N rate effects on some chemical properties in two contrasting soil types in Western Canada
TL;DR: In this paper, the effects of tillage, crop residue management and N fertilization on chemical properties of the soil were investigated in two field experiments with barley, wheat, or canola in a rotation on Gray Luvisol (Typic Cryoboralf) loam at Breton and Black Chernozem (Albic Argicryoll) lame at Ellerslie, Alberta, Canada.
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Long-Term Tillage, Straw Management, and Nitrogen Fertilization Effects on Organic Matter and Mineralizable Carbon and Nitrogen in a Black Chernozem Soil
TL;DR: In this paper, a long-term field experiment (growing barley, wheat, or canola) was conducted on a Black Chernozem (Albic Argicryoll) loam at Ellerslie, Alberta, Canada, to determine the influence of 19 years (1980 to 1998) of tillage [zero tillage and conventional tillage (CT)], straw management [straw removed (SRem) and straw retained (SRet)], and N fertilizer rate (0, 50, and 100kg N ha−1 in SRet and 0,kg N
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Influence of Long-term Tillage, Straw, and N Fertilizer Management on Crop Yield, N Uptake, and N Balance Sheet in Two Contrasting Soil Types
TL;DR: In this paper, the influence of tillage (zero tillage and conventional tillage), straw management (straw removed [SRem] and straw retained [SRet]), and N fertilizer rate (0, 50 and 100 kg N ha−1in SRet, and only 0 kg N h − 1in SRem plots) on seed yield, straw yield, total N uptake in seed + straw (1991-2008), and N balance sheet (1980-2008).
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Historic climate change trends and impacts on crop yields in key agricultural areas of the Prairie Provinces in Canada: a literature review
Abstract: The objective of this literature review was to compile research findings on climate change and its impacts on crop production in Prairie Provinces of Canada. Our search strategy included finding primary literature articles from various databases. Seven articles reported increases in average and minimum air temperature over time in the Prairie Provinces of Canada. Increases in maximum air temperature were smaller than that for minimum air temperature. Growing degree days (GDD) and corn heat units (CHU) also increased over time, which has allowed for potential expansion of corn growth northwards. While overall increases in average annual precipitation and growing season precipitation have occurred in Canada between1900 and 2021, western Canada showed increases in some regions but decreases in others. Off-season precipitation and snow cover duration in Canada have decreased since 1950. The number of frost-free days has increased across Canada, on the Prairies and southern Saskatchewan since 1900. Annual snowfall has decreased since 1950 and across Canada the annual maximum snow depth has also decreased. Overall, studies focusing on the Prairie Provinces in Canada have shown accelerated changes in several climate parameters over time, affecting cropping areas and crop yields.
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