Phosphorus Retention from Dairy Slurry in Four Grassland Soils and Release to Soil Solution PDF Download
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Author: Peter Whitehead
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Peter Whitehead
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Peter Whitehead
Publisher:
ISBN:
Category : Phosphorus in agriculture
Languages : en
Pages :
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Author: Ronaldo Severiano Berton
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 290
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The addition of organic residues to the soil may modify the amounts of plant available phosphorus (P) found in this ssytem. These studies were undertaken to evaluate the suitability of the sorption isotherm technique for estimating the amounts of inorganic P required for optimum plant growth, the correlation of P availability with the amount of P extracted by three chemical methods, and with the activity of two phosphatase enzymes, when soils were amended with organic materials. Acid phosphatase and phosphodiesterase activities were also compared with the P availability to plants. Soil phosphodiesterase activity correlated better with corn yield and plant uptake than acid phosphatase activity. The correlation of phosphodiesterase activity with microbial activity might be used to indicate the contribution of the soil organic P pool in the P supply to the plant.
Author: Abdullah Al-Shankiti
Publisher:
ISBN:
Category : Cropping systems
Languages : en
Pages : 252
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Author: Pedro A. Sanchez
Publisher: Cambridge University Press
ISBN: 1107176050
Category : Business & Economics
Languages : en
Pages : 685
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Book Description
Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
Author: Aaron Malek
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Both raw and digested FDM, and through 30 pore volumes, very little leaching of P at all. The soils receiving inorganic P retarded leaching the least, and the extent of retardation was related to the soils inherent P sorbing capacity through Al and Fe oxide content. ANOVA output revealed significant differences in P accumulation in the soils among P amendments and soils, as well as a P amendment * soil interaction. Duncan's Multiple Range Test showed the P accumulated in soils receiving inorganic P to be significantly less than those receiving raw or digested FDM. Precipitation with Ca and Mg contained in the FDM, entrapment of particulate P, and immobility of OM due to soil chemistry are the suspected explanations for the lack of P breakthrough in FDM amended columns. The precipitated P is not expected to be stable and will leach into the deeper soil horizons. This study highlights the differences in P behavior in soils when delivered through different mediums and the complexity of the soil chemistry regarding P when FDM is amended to soils. It also demands further research in this area to better understand the processes and consequences of P leaching where similar practices are employed.
Author: G. Hucker
Publisher: Springer
ISBN: 9027703175
Category : Science
Languages : en
Pages : 456
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Book Description
Proceedings of the EEC Seminar Organized jointly by the CEC and the Institute for Soil Fertility, Haren (Gr) and held in Groningen, The Netherlands, June 12-13, 1980
Author: L. J. Evans
Publisher:
ISBN:
Category : Crop residues
Languages : en
Pages : 33
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Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251318948
Category : Technology & Engineering
Languages : en
Pages : 40
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This report presents the world nitrogen, phosphorus and potassium fertilizer medium-term supply and demand forecasts for the period 2017-2022. FAO, in collaboration with other members of the Fertilizer Outlook Expert Group dealing with fertilizer production, consumption and trade, provides forecasts of world and regional fertilizer supply, demand and potential balance.
Author: M. A. Tabatabai
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 752
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