Technical Updates are information bulletins that highlight research that has been performed using the PRS™-probes.
Note: New updates are distributed to interested researchers.
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PRS™ Technical Update Issue 2010-2
PRS™-probes a tool for monitoring biogenic & edaphic functions of ecosystems
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PRS™ Technical Update Issue 2010-1
PRS™-probes measure the dynamics of soil N in relation to N cycling
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PRS™ Technical Update Issue 2009-3
PRS™-probes: measure soil N dynamics in perennial crop production
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PRS™ Technical Update Issue 2009-2
PRS™-probes: a tool to measure plant-available soil nitrogen and to quantify dynamic turn-over rates in forest soils
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PRS™ Technical Update Issue 2009-1
PRS™-probes: a sensitive tool to measure N-fluxes in mixed plant ecosystems
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PRS™ Technical Update Issue 2008-3
PRS™-probes aid development of sustainable agriculture in tropical regions
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PRS™ Technical Update Issue 2008-2
PRS™-probes used to study the impact of simulated climate change
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PRS™ Technical Update Issue 2008-1
PRS™-probes measure dynamic soil nutrient fluxes in berry patches
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PRS™ Technical Update Issue 2007-3
PRS™-probes detect the release of nutrients from organic amendments
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PRS™ Technical Update Issue 2007-2
PRS™-probes explain relationships between soil nutrient supply rate and non-native plant invasion
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PRS™ Technical Update Issue 2007-1
PRS™-probes: a sensitive soil monitoring tool for nutrient studies
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PRS™ Technical Update Issue 2006-2
PRS™-probes for ecology: a functional measure of soil nutrient supply
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PRS™ Technical Update Issue 2006-1
Benefits of Using PRS™-probes vs. Raw Membrane:
Advantages of the PRS™-probe compared with raw ion-exchange membrane include: easier insertion and removal with minimal soil disturbance; easier to guarantee proper contact between the IEM and soil; easily labelled, therefore, facilitating the tracking of samples among different treatment plots, with less chance of sample mix-up; and the PRS™-probes are easier to clean.
Are All Ion-Exchange Membranes Similar?:
There are two types of ion-exchange membranes currently used by researchers to measure soil nutrient dynamics, homogeneous (contained in the PRS™-probes) and heterogeneous. The fundamental difference between the two types and the limitations of the heterogeneous membrane are discussed.
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PRS™ Technical Update Issue 2005-2
Agriculture & Agri-Food Canada:
Microsite assessment of the impact of cattle urine on NO3--N and NH4+-N supply rates.
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Award-winning research
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Laval University:
Microsite assessment of the effects of mounding site preparation on soil nutrient bioavailability.
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PRS™ Technical Update Issue 2005-1
University of Idaho’s Intermountain Forest Tree Nutrition Cooperative:
PRS™-probes were used to measure soil P bioavailability throughout the growing season in a mature Douglas-fir forest.
University of Saskatchewan:
The utility of PRS™-probes for predicting the movement of plant-available soil P to surface waters following repeated applications of animal manure.
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PRS™ Technical Update Issue 2004-2
Organic Agricultural Centre of Canada:
PRS™-probes were used to assess the soil N supply rate in potato fields (cv. Shepody) amended with compost or manure.
University of Saskatchewan:
The effect of 13 different solid manure amendments on soil N supply on two contrasting soil types and its relationship with N uptake by canola plants.
Pacific Forestry Research Centre:
The effects of shelterwood vs. clearcut harvesting systems and different vegetation management practices (control vs. herbicide) on growing season soil N supply rates and to determine its relationship with conifer seedling N uptake and growth.
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PRS™ Technical Update Issue 2004-1
Cornell University:
The impact of different rates of fertilizer K on turfgrass growth and soil K supply rate.
University of Saskatchewan:
The effects of both nitrification and urease inhibitors to elicit a slow-release response with applied urea fertilizer in two different soil types.
Laval University:
The impacts of mounding site preparation on both soil N and P supply rates.
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PRS™ Technical Update Issue 2003-2
University of Saskatchewan:
The relationship between spring NO3--N supply rates within no tillage and conventional tillage treatments and N uptake by wheat.
University of Idaho’s Intermountain Forest Tree Nutrition Cooperative:
Measuring temporal changes in nutrient availability throughout the growing season in a 50-year old coniferous forest.
University of Alberta:
The relative influence of four petroleum wellsite rehabilitation strategies on N availability within disturbed Dry Mixed Grass prairie.
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PRS™ Technical Update Issue 2003-1
University of Saskatchewan:
Effect of fertilizer placement method on initial seed row NO3--N supply rates.
Western Ag Innovations:
Assessment of interspecific competition for soil N between outplanted white spruce and jack pine seedlings and non-crop vegetation using PRS™-probes; and influence of soil temperature on nutrient supply rates.
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PRS™ Technical Update Issue 2002-2
Washington State University:
Influence of soil organic matter content on cumulative N supplies in a vineyard.
University of Saskatchewan:
Spatial patterns of N and P uptake by PRS™-probes and fine root biomass in forest floor horizons; and relationship between heavy metal uptake by radish and PRS™-probe supply rates.
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PRS™ Technical Update Issue
2002-1
Pacific Forestry Research Centre: Western Hemlock tissue
N content as related to N supply rate.
University of Saskatchewan: N, P, K supply rates vs.
water-extractable levels in forest floor horizons.
Western Ag Innovations: Discussion of the application of
PRS™-probes in forestry related research.
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PRS™ Technical Update Issue
2001-2
University of Saskatchewan: Influence of long-term P
fertilizer application on N & K supply rates;
relationship between Mg supply rates and Cassava tissue
Mg concentrations; and the influence of soil moisture
levels on nutrient supply rate measurements.
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PRS™ Technical Update Issue
2001-1
Washington State University: Effect of mulch treatment on
cumulative NO3--N supply rates in an orchard.
University of Saskatchewan: Effect of hog manure or urea
addition on soil P supply rates over time; and influence
of PRS™-probe burial duration on nutrient supply
rate measurements.
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PRS™ Technical Update Issue 2000-2
Agriculture & Agri-Food Canada: Impact of pasture
type on N supply rates and forage N uptake.
Western Ag Innovations: Relationship between K supply
rate and ammonium acetate extractable K.
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PRS™ Technical Update Issue 2000-1
Oregon State University: Comparison of N and K supplies
following clover and oats.
Alberta Agriculture, Food & Rural Development: K
supply rates vs. uptake in manured Timothy.
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