Soil changes over 12 years of conventional vs. conservation management on irrigated rotations in southern Alberta

Larney, Francis J.; Pearson, Drusilla C.; Blackshaw, Robert E.; Lupwayi, Newton Z.

doi:10.1139/cjss-2016-0141

Cited by 5 publications

(10 citation statements)

References 47 publications

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“…In our study, a narrow range of soil EC was observed among the crop rotations (Table 2). The higher amount of Na after sugar beet, compared with other crop phase, could be related to the sugar beet's deep root nutrients extract causing the soil nutrients to move up to the near surface layers (Larney et al., 2017). The inclusion of sugar beet in C–DB–C–SB rotation could reduce the advantage of continuous NT practice in maintaining surface residue due to soil disturbance during sugar beet harvest, up to 20‐cm, every fourth year.…”

Section: Resultsmentioning

confidence: 99%

Soil chemical properties after 12 years of tillage and crop rotation

et al. 2020

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Section: Resultsmentioning

confidence: 99%

Soil chemical properties after 12 years of tillage and crop rotation

et al. 2020

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“…The 12‐yr study concluded after harvest in fall 2011, with the number of completed rotation cycles ranging from four (3‐CONV, 3‐CONS) to two (6‐CONS) (Table 1). In fall 2011, a final set of soil samples was taken for nutrient analyses on all plots (Larney et al., 2017a). Available P levels throughout the study were nonlimiting to plant growth (Larney et al., 2017a).…”

Section: Methodsmentioning

confidence: 99%

“…In fall 2011, a final set of soil samples was taken for nutrient analyses on all plots (Larney et al., 2017a). Available P levels throughout the study were nonlimiting to plant growth (Larney et al., 2017a).…”

Section: Methodsmentioning

confidence: 99%

“…Additionally, implementing a suite of CONS practices posed little risk of increased weed pressures (Blackshaw et al., 2015). Soil health parameters were also enhanced by CONS management, including soil organic C (SOC), particulate organic matter C and N, and aggregate stability (Larney et al., 2017a; Li et al., 2015). Total soil microbial biomass, and that of its components (fungi and bacteria), and β‐glucosidase activity were also significantly greater under CONS management (Lupwayi et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Assessing legacy effects of a 12‐year irrigated cropping systems study with a post‐hoc bioassay

Larney

Pearson

Blackshaw

et al. 2021

Agrosystems Geosci & Env

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A healthy soil resource is vital to the continued success of irrigated agriculture in southern Alberta. A 12‐yr (2000–2011) irrigated cropping systems study was followed with a dry bean (Phaseolus vulgaris L.) field bioassay in 2012, to assess legacy effects of preceding management. Specifically, a comparison of conventional (CONV) and conservation (CONS) management (reduced tillage, cover crops, compost addition, narrow‐row dry bean) legacies was sought. However, rotational legacies such as preceding phase, length, preceding crop, and interval since previous dry bean were also assessed by the fully phased experimental setup. Only 1 of 18 possible soil management contrasts (CONV vs. CONS, 2000–2011) was significant for the dry bean bioassay in 2012, despite overwhelming evidence of improved soil health (microbial biomass C and β‐glucosidase activity) under CONS management. Monoculture wheat (Triticum aestivum L.) from 2000 to 2011 led to 2 d earlier maturity and higher disease incidence in bioassay dry bean. With wheat as a preceding crop, bioassay dry bean was significantly shorter (4 cm), earlier maturing (2 d), and lower yielding (by 21–35%) than with dry bean, potato (Solanum tuberosum L.), or sugar beet (Beta vulgaris L.) as preceding crops, largely due to volunteer wheat competition. Significantly enhanced bioassay yields (9–13%) with shorter intervals since previous dry bean demonstrated a “legume effect.” Overall, the dry bean bioassay was less effective at assessing soil management legacies (CONV vs. CONS) than rotational legacies such as preceding crop or interval since previous dry bean.

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“…The specific objectives of this study were to assess SWS wheat yield and quality in 3-5 yr irrigated rotations with dry bean, potato, and sugar beet under CONV or CONS soil management over 12 yr. The effects of rotation and soil management on dry bean (Larney et al 2015), potato (Larney et al 2016b), and sugar beet (Larney et al 2016a) performance and soil quality (Li et al 2015;Larney et al 2017a;Lupwayi et al 2017aLupwayi et al , 2017b have been reported.…”

Section: Introductionmentioning

confidence: 99%

Irrigated soft white spring wheat is largely unresponsive to conservation management in rotations with dry bean, potato and sugar beet

et al. 2017

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Historically, soft white spring (SWS) wheat (Triticum aestivum L.) has been a crop choice in southern Alberta's irrigation districts. A 12-yr (2000-2011) study compared conservation (CONS) and conventional (CONV) management for SWS wheat in 3-5-yr rotations with dry bean (Phaseolus vulgaris L.), potato (Solanum tuberosum L.), and sugar beet (Beta vulgaris L.). Conservation management incorporated reduced tillage, compost, cover crops, and narrow-row dry bean. Wheat was largely unresponsive to CONS management, with only 2 of 13 parameters showing significant positive effects: greater grain Ca (605 vs. 576 μg g −1 on CONV) and S concentrations (1137 vs. 1105 μg g −1 on CONV). Two parameters showed significant negative responses to CONS management: shorter plant height (82.8 vs. 84.8 cm on CONV) and higher take-all [Gaeumannomyces graminis (Sacc.) Arx & Olivier var. tritici Walker] severity (1.34 vs. 1.27 rating on CONV). The remaining nine parameters were unresponsive: plant density, days to maturity, grain yield, grain protein concentration, test weight, kernel hardness, wheat stem sawfly [Cephus cinctus Norton (Hymenoptera: Cephidae)] damage, and grain P and K concentrations. With a backdrop of continued decline in irrigated SWS wheat hectarage, we feel our data is relevant to other wheat classes grown under irrigation in southern Alberta.

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Soil changes over 12 years of conventional vs. conservation management on irrigated rotations in southern Alberta

Cited by 5 publications

References 47 publications

Soil chemical properties after 12 years of tillage and crop rotation

Soil chemical properties after 12 years of tillage and crop rotation

Assessing legacy effects of a 12‐year irrigated cropping systems study with a post‐hoc bioassay

Irrigated soft white spring wheat is largely unresponsive to conservation management in rotations with dry bean, potato and sugar beet

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