Abstract Arctic soils store large amounts of labile soil organic matter ( SOM ) and several studies have suggested that characteristics may explain variations in cycling rates across landscapes A rctic ecosystems. The objective this study was to investigate the influence routinely measured properties on gross N mineralization GHG emissions at landscape scale. This carried out three C anadian ecosystems: Sub‐ hurchill, MB ), Low‐ D aring L ake, NWT High‐ T ruelove owlands, NU ). were divided...

Common eastern bumble bees (Bombus impatiens Cresson) play an essential role in pollinating lowbush blueberries (LB) northern Quebec, but their costs and the suboptimal weather conditions during pollination highlight need to find appropriate hive management strategies. A study was conducted a LB field Saguenay (Québec, Canada) focusing on effects of insulation (I+ I−), heating (H+ H−), placement single-row tree line windbreak. High-definition time-lapse cameras monitored activities bee...

Satellite remote sensing is a widely accessible tool to investigate the spatiotemporal variations in bud phenology of evergreen species, which show limited seasonal changes canopy greenness. However, there need for precise and compatible data compare time series with field observations. In this study, fortnightly MODIS-NDVI was fitted using double-logistic functions calibrated ordinal logit models sequential phases collected during 2015, 2017 2018 black spruce stand. Bud break set were...

Understanding how plant allometry, architecture and phenology contribute to fruit production can identify those traits that maximize yield. In this study, we compared these variables yield for two shrub species, Vaccinium angustifolium myrtilloides, test the hypothesis is linked plants' allometric traits, which are predictors of production.We measured leaf flower above-ground biomass both species in a commercial wild lowbush blueberry field (Quebec, Canada) over 2-year crop cycle; 1 year...

Cryosolic soils store large amounts of carbon (C) because soil organic matter (SOM) decomposition is slower than plant growth. The response arctic SOM to climate change likely depend not only on temperature, but also upon complex interactions between properties and chemistry. We hypothesized that surface (>17% carbon) have more labile mineral (<17% carbon). Furthermore, we high from the Low Arctic subarctic. This study was conducted in 3 ecosystems: subarctic (Churchill, Manitoba; n =...

As the focus of soil science education in Canada and elsewhere has shifted towards nonsoil majors, it is important to understand if how this affected scope introductory courses. The objectives study were inventory Canadian postsecondary units that offer courses document attributes instructors, students, teaching approaches these We surveyed 58% instructors across Canada, most offered by geography environmental units. majority followed a traditional lecture (86%) laboratory (76%) delivery...

Some granulated organo-mineral fertilizers (OMF) are made with peat and their utilization is expected to increase mostly because of advantages over mineral fertilizers. However, a non-renewable resource could be replaced by sustainable organic materials such as stabilized composted pig slurry. The objectives this study were determine the changes OMF physical properties when 1) substituting slurry mixtures, 2) changing source 3) increasing level material in OMF. Thirty-four mixtures compost,...

The forest floor of boreal stores large amounts organic C that may react to a warming climate and increased N deposition. It is therefore crucial assess the impact these factors on temperature sensitivity this pool help predict future soil CO2 emissions from soils atmosphere. In study, (+2-4°C) canopy addition (CNA; +0.30-0.35 kg·N·ha-1·yr-1) were replicated along topographic gradient (upper, back lower slope) in Quebec, Canada. After nine years treatment, was collected each plot, its...

Numerous studies have speculated that lowbush blueberry (Vaccinium angustifolium) is less efficient than weed species at taking up inorganic nitrogen (N) derived from fertilizers, thus raising questions as to the effectiveness of N fertilization in commercial fields. However, competition for acquiring well specific interactions between and companion weeds characterized by contrasted functional traits remain poorly documented. Here, we assessed fertilizer-derived acquisition efficiency...

Inorganic N fertilizers are commonly used in commercial blueberry fields; however, this form of can favor increased weed species' growth, which ultimately reduce the benefits fertilization. We hypothesized that chipped ramial wood (CRW) compost is an effective alternative organic fertilizer for plants when weeds present, as ericaceous shrub species generally more efficient utilizing than herbaceous species. In study, we measured fruit yield, and foliar response lowbush (Vaccinium...

Agroecosystem conditions limit the productivity of lowbush blueberry. Our objectives were to investigate effects on berry yield agroecosystem and crop management variables, then develop a recommendation system adjust nutrient soil blueberry given local meteorological conditions. We collected 1504 observations from N-P-K fertilizer trials conducted in Quebec, Canada. The data set, that comprised soil, tissue, data, was processed by Bayesian mixed models, machine learning, compositional...

Pare, M. C. and Bedard-Haughn, A. 2011. Optimum liquid density in separation of the physically uncomplexed organic matter Arctic soils. Can. J. Soil Sci. 91: 65-68. Using an appropriate to separate soil light fraction (LF) heavy (HF) is important aspect fractionation technique. The effect when separating (SOM) was tested on three sites: High-Arctic, Low-Arctic, Sub-Arctic. Our results showed that selecting right use for soils not unequivocal. Nevertheless, based these two criteria: (1)...

Changes in atmospheric N deposition and the global warming associated with human activities may impact soil organic matter mineralization rate, possible consequences on ecosystem functioning productivity. In this study, temperature was increased by +2–4 °C from April to July heating cables artificial rain applied above canopy of mature stands June September simulate a 50% increase concentration for period nine years (2008–2016) two eastern Canada boreal forests (BER SIM). We assessed effects...

Paré, M. C. and Bedard-Haughn, A. 2011. Optimum liquid density in separation of the physically uncomplexed organic matter Arctic soils. Can. J. Soil Sci. 91: 65–68. Using an appropriate to separate soil light fraction (LF) heavy (HF) is important aspect fractionation technique. The effect when separating (SOM) was tested on three sites: High-Arctic, Low-Arctic, Sub-Arctic. Our results showed that selecting right use for soils not unequivocal. Nevertheless, based these two criteria: (1)...