Joann K. Whalen

Université Mohammed VI Polytechnique

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Robert L. Bradley

Université de Sherbrooke

Leanne Ejack

McGill University

Chandra A. Madramootoo

McGill University

Chih‐Yu Hung

Agriculture and Agri-Food Canada

Huixin Li

Nanjing Agricultural University

Feng Hu

Nanjing Agricultural University

B. L.

Agriculture and Agri-Food Canada

Shamim Gul

University of Balochistan

Philippe Rochette

Agriculture and Agri-Food Canada

Maria Kernecker

Leibniz Centre for Agricultural Landscape Research

Cooperative Institutions

McGill University

129

Agriculture and Agri-Food Canada

Chinese Academy of Sciences

Nanjing Agricultural University

Ministry of Agriculture and Rural Affairs

Centre National de la Recherche Scientifique

Université Laval

Université de Sherbrooke

Université de Montréal

Sichuan Agricultural University

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Phosphate Sorption and Release in a Sandy‐Loam Soil as Influenced by Fertilizer Sources

Soil Science Society of America Journal (2007)

You Jiao Joann K. Whalen William H. Hendershot

Soil phosphate (PO 4 –P) sorption and release is affected by reactions at the solution–soil surface interface. The objective of this study was to determine how the net negative surface charge and phosphate adsorption/desorption processes in a sandy‐loam soil were affected by cattle manure and inorganic fertilizer applications. The soil came from a field experiment where manure and triple superphosphate (TSP) were applied annually on an equivalent plant‐available P basis. After 4 yr, manured soils had 37% more negative surface charge in soil suspensions from pH 4 to 7 than TSP‐fertilized soils. Phosphate adsorption was 23% lower in soils receiving manure than TSP. The phosphate adsorption data (adsorption of added phosphate + native adsorbed phosphate) was modeled with the Langmuir 2‐surface equation, which revealed that the binding strength for phosphate, including native adsorbed phosphate, was about 50% less in the manured soils than the TSP‐fertilized soils. These results suggest that manure applications that increase the net negative surface charge also reduce the soil phosphate adsorption capacity. The cumulative desorbed phosphate was twofold greater from manured soils than TSP‐fertilized soils. This confirmed the results from phosphate adsorption isotherms showing that phosphate was weakly bound in manured soils, compared with TSP‐fertilized soils. We found that manuring not only decreased phosphate retention by the soil but also increased phosphate release into the soil solution, and thus may lead to greater transport of phosphate from agricultural land to waterways.

10.2136/sssaj2006.0028

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Citations (80)

Examination of ester sulfates in Podzolic and Regosolic soils using an immobilized arylsulfatase reactor

Biology and Fertility of Soils (1996)

Joann K. Whalen P. R. Warman

Arylsulfatase

Podzol

10.1007/s003740050139

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Growth, yield, and yield components of canola as affected by nitrogen, sulfur, and boron application

Journal of Plant Nutrition and Soil Science (2015)

B. L.Dilip Kumar Biswas Aruna Herath Joann K. Whalen S. Qianying Ruan

Abstract Developing efficient nutrient management regimes is a prerequisite for promoting canola ( Brassica napus L.) as a viable cash crop in eastern Canada. Field experiments were conducted to investigate the growth, yield, and yield components of canola in response to various combinations of preplant and sidedress nitrogen (N) with soil‐applied sulfur (S) and soil and foliar‐applied boron (B). Canola yield and all its yield components were strongly correlated ( r 2 = 0.99) with the amount of N applied, as was the above‐ground biomass at 20% flowering and the leaf area index. Sidedress N was more efficiently utilized by the crop, leading to greater yields than preplant N application. On average, canola yields increased by 9.7 kg ha −1 for preplant N application and by 13.7 kg ha −1 for sidedress N application, for every kg N ha −1 applied, in 6 of the 10 site‐years. Soil‐applied S also increased canola yields by 3–31% in 7 of the 10 site‐years, but had no effect on yield components. While there was no change in yield from soil‐applied B, the foliar B application at early flowering increased yields up to 10%, indicating that canola plants absorb B efficiently through their leaves. In summary, canola yields were improved by fertilization with N (8 of 10 site‐years), S (7 of 10 site‐years) and B (4 of 10 site‐years). Yield gains were also noted with split N‐fertilizer application that involved sidedressing N between the rosette and early flowering stage. Following these fertilizer practices could improve the yield and quality of canola crop grown in rainfed humid regions similar to those in eastern Canada.

10.1002/jpln.201400280

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Citations (67)

Corn residue inputs influence earthworm population dynamics in a no-till corn-soybean rotation

Applied Soil Ecology (2018)

Zhor Abail Joann K. Whalen

Crop Residue

Agroecosystem

Lumbricidae

Residue (chemistry)

Lumbricus terrestris

Crop Rotation

10.1016/j.apsoil.2018.03.013

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Citations (34)

Formation of millimetric-scale aggregates and associated retention of 13C–15N-labelled residues are greater in subsoil than topsoil

Soil Biology and Biochemistry (2014)

Vincent Poirier Denis A. Angers Joann K. Whalen

Subsoil

Topsoil

Crop Residue

Soil carbon

Residue (chemistry)

10.1016/j.soilbio.2014.03.020

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Citations (45)

Selective ingestion contributes to the stoichiometric homeostasis in tissues of the endogeic earthworm Aporrectodea turgida

Soil Biology and Biochemistry (2018)

Zhor Abail Joann K. Whalen

Litter

Homeostasis

10.1016/j.soilbio.2018.01.014

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Citations (11)

Plausible impacts of fall manuring on cover crop production and spring nitrous oxide emissions under climate change in southern Quebec, Canada

Agriculture Ecosystems & Environment (2021)

Chih‐Yu Hung Joann K. Whalen

Baseline (sea)

10.1016/j.agee.2021.107620

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Citations (1)

Human health risks from brominated flame retardants and polycyclic aromatic hydrocarbons in indoor dust

Chemosphere (2021)

Meshari Al‐Harbi Eman Al-Enzi Hessa K. Al-Mutairi Joann K. Whalen

Hazard quotient

10.1016/j.chemosphere.2021.131005

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Citations (45)

Health risks associated with the polycyclic aromatic hydrocarbons in indoor dust collected from houses in Kuwait

Environmental Pollution (2020)

Meshari Al‐Harbi Ibrahim Alhajri Joann K. Whalen

10.1016/j.envpol.2020.115054

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Citations (36)

Mechanisms for altering phosphorus sorption characteristics induced by low-molecular-weight organic acids

Canadian Journal of Soil Science (2016)

Yongzhuang Wang Joann K. Whalen Xin Chen Yanhong Cao Bin Huang

Exudation of low-molecular-weight organic acids (LMWOAs) from plant roots enhances phosphorus (P) acquisition from soil, either by dissolving P fixed in secondary minerals or by reducing P sorption to organo-minerals. How LMWOAs may modify P sorption in soils with contrasting pH is not well understood, much less the mechanisms involved. The effects of three common LMWOAs (oxalic, citric, and malic acids) on P sorption in calcareous, neutral, and acidic soils were studied in batch experiments, followed by sequential P fractionation to elucidate the mechanisms whereby LMWOAs alter P sorption. The sorption data of the three soils fitted better to the Freundlich equation (r 2 = 0.325–0.994, P < 0.05) than the Langmuir and linear equations. Oxalic, citric, and malic acids at 10 mmol kg −1 soil decreased the Freundlich P sorption parameters K f and n, which represent P sorption capacity and energy, due to the fact that LMWOAs reduced P sorption in NaHCO 3 -Pi (soil soluble and exchangeable Pi, 23.8–30.9%) and NaOH-Pi (Fe-Pi and Al-Pi, 21.6–54.2%) fractions of the three soils. Comparing acidified P-LMWOAs solutions with the pH-adjusted P-LMWOAs solutions (pH = 7) had a minor effect on P sorption. Our results indicated that the reduction in soil P sorption was due to ligand exchange and chelation of LMWOAs with Fe and Al minerals, and the acid strength of LMWOAs had a minor effect on P sorption in calcareous, neutral, and acid soils.

Oxalic Acid

Malic acid

10.1139/cjss-2015-0068

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Citations (44)