Sorption and Desorption of Phosphorus as Influenced by Corn Stalk Residue, PH, and Ionic Strength in a Gleysol from Québec, Canada PDF Download
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Author: Mariam Sorour
Publisher:
ISBN:
Category :
Languages : en
Pages :
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"The Pike River watershed has a history of phosphorus (P) pollution due to surface and subsurface leaching, and erosion of agricultural soil rich in P. It is therefore important to consider factors that may change the dynamics of P sorption and desorption behaviours and potentially increase the P concentration in the soil solution. This thesis investigates the effect of corn stalk residue presence and application rate on P sorption and desorption. This thesis also investigates the effect of varying solution pH and ionic strength on P release. Batch experiments were used to investigate P sorption followed by experiments to test the reversibility of the sorption process under different corn stalk residue applications (0.3,5.3,10.3,15.3, and 20.3%) and at different P concentrations (0, 12.9, 27.7, 42.2, 57.0, and 71.8 mg L-1). The quantity of P sorbed to soil was found to decrease significantly as residue application rates increased (p
Author: Mariam Sorour
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"The Pike River watershed has a history of phosphorus (P) pollution due to surface and subsurface leaching, and erosion of agricultural soil rich in P. It is therefore important to consider factors that may change the dynamics of P sorption and desorption behaviours and potentially increase the P concentration in the soil solution. This thesis investigates the effect of corn stalk residue presence and application rate on P sorption and desorption. This thesis also investigates the effect of varying solution pH and ionic strength on P release. Batch experiments were used to investigate P sorption followed by experiments to test the reversibility of the sorption process under different corn stalk residue applications (0.3,5.3,10.3,15.3, and 20.3%) and at different P concentrations (0, 12.9, 27.7, 42.2, 57.0, and 71.8 mg L-1). The quantity of P sorbed to soil was found to decrease significantly as residue application rates increased (p
Author: Xinmin Wang
Publisher:
ISBN:
Category : Oxisols
Languages : en
Pages : 384
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Author: C.M. Duque
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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Book Description
The potential of competitive anion adsorption for phosphate, using silicate and sulfate as a possible management strategy to increase phosphate availability to corn was tested on two extremely acidic, phosphorus deficient soils, Luisiana clay and Adtuyon clay. This study was conducted with the following objectives: a) to evaluate the effects of calcium, magnesium, potassium and sodium silicates on P sorption, available P and dry matter yield of corn. b) to evaluate the effects of calcium, magnesium and sodium sulfate on P sorption,available P and dry matter yield of corn, and c) to evaluate the effects of calcium silicate and calcium sulfate on available P. soil pH, exchangeable aluminum and grain yield of corn. Application of 250 ppm and 500 ppm silicate in the form of calcium silicate on Luisiana clay decreased the P sorption maximum of the soil from 2.4522 to 2.4237 and 2.2969 mg Pg-1, respectively. Other silicate sources had lesses effect than calcium silicate in decreasing the P sorption maximum of the soil. Sulfate application resulted to a very Slight decrease in the P sorption maximum of the soil. On Luisiana clay not fertilized with phosphorus, application of differnt silicate and sulfate compounds did not increase dry matter yield of corn but phosphorus application resulted in significantly higher dry matter yield. Combined application of 150 ppm P and 250 ppm silicate as calcium silicate and potassium silicate significantly increased dry matter yield of corn. On Adtuyon clay, the application of (...).
Author: Yingming Liang
Publisher:
ISBN:
Category :
Languages : en
Pages : 414
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Author: Shinjiro Sato
Publisher:
ISBN:
Category :
Languages : en
Pages :
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ABSTRACT: This ageing process was due to a shaking artifact (30%), microbial immobilization (57%), and sorption of P onto the soil in a non-oxalate accessible form (13%). Liming and organic anion loading improved P bioavailability in this Brazilian soil. Long-term ageing and continuous exudation of organic anions also influence P bioavailability. Management options that recognize this will improve bioavailability of native and applied P sources in this important agricultural region of northeastern Brazil.
Author: M.J. Wilson
Publisher: Springer Science & Business Media
ISBN: 9401141819
Category : Political Science
Languages : en
Pages : 375
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Book Description
Agriculture is a crucial component of the economies of many of the countries in transition from a centrally-planned to a market economy and the sector is by no means immune to the environmental and socioeconomic problems confronting the countries as a whole. The concept of sustainable development provides a convenient framework for the formulation of government environmental policy for such countries, especially those of them that aspire to join the EU and would thus be expected to meet EU environmental standards. For agriculture, this inevitably involves appropriate strategies for balancing crop and animal production while protecting the quality of the national soil and water resources. There is thus an urgent need to compile, exchange and evaluate current information on the quality of soils in these countries, and to assess the potential impact of new management practices on the soil and on the wider environment.
Author: Douglas L. Karlen
Publisher: MDPI
ISBN: 3038423580
Category : Science
Languages : en
Pages : 337
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Book Description
This book is a printed edition of the Special Issue "Enhancing Soil Health to Mitigate Soil Degradation" that was published in Sustainability
Author: International Rice Research Institute
Publisher: Int. Rice Res. Inst.
ISBN: 9712200736
Category : Technology & Engineering
Languages : en
Pages : 991
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Book Description
Fragile lives in fragile ecosystems: Feeding the world's poor from neglected rice ecosystems was the theme of the 1995 International Rice Research Conference. During the February meeting, participants assessed progress in rice research and identified new research approaches for reducing constraints and improving productivity and sustainability of less favored and fragile rice producing areas - these are the upland, rainfed lowland, and flood-prone ecosystems.
Author: Fred Magdoff
Publisher: CRC Press
ISBN: 020349637X
Category : Technology & Engineering
Languages : en
Pages : 411
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Book Description
Recognition of the importance of soil organic matter (SOM) in soil health and quality is a major part of fostering a holistic, preventive approach to agricultural management. Students in agronomy, horticulture, and soil science need a textbook that emphasizes strategies for using SOM management in the prevention of chemical, biological, and physical problems. Soil Organic Matter in Sustainable Agriculture gathers key scientific reviews concerning issues that are critical for successful SOM management. This textbook contains evaluations of the types of organic soil constituents—organisms, fresh residues, and well-decomposed substances. It explores the beneficial effects of organic matter on soil and the various practices that enhance SOM. Chapters include an examination of the results of crop management practices on soil organisms, organic matter gains and losses, the significance of various SOM fractions, and the contributions of fungi and earthworms to soil quality and crop growth. Emphasizing the prevention of imbalances that lead to soil and crop problems, the text also explores the development of soils suppressive to plant diseases and pests, and relates SOM management to the supply of nutrients to crops. This book provides the essential scientific background and poses the challenging questions that students need to better understand SOM and develop improved soil and crop management systems.
Author: Bernard P. K. Yerima
Publisher: Trafford
ISBN: 9781412057899
Category : Soil science
Languages : en
Pages : 312
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Book Description
Describes the major soil classification systems of Cameroon.
