Studies on the Forms and Availability of Soil Organic Phosphorus PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Studies on the Forms and Availability of Soil Organic Phosphorus PDF full book. Access full book title Studies on the Forms and Availability of Soil Organic Phosphorus by C. A. Bower. Download full books in PDF and EPUB format.
Author: C. A. Bower
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 48
Get Book Here
Book Description
Author: C. A. Bower
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 48
Get Book Here
Book Description
Author: Luke Gatiboni
Publisher: Frontiers Media SA
ISBN: 2889663574
Category : Science
Languages : en
Pages : 140
Get Book Here
Book Description
Author: William Baynard Boykin
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 206
Get Book Here
Book Description
Author: Else K. Bünemann
Publisher: Springer Science & Business Media
ISBN: 3642152716
Category : Science
Languages : en
Pages : 485
Get Book Here
Book Description
Phosphorus (P) is a finite resource which is essential for life. It is a limiting nutrient in many ecosystems but also a pollutant which can affect biodiversity in terrestrial ecosystems and change the ecology of water bodies. This book collects the latest information on biological processes in soil P cycling, which to date have remained much less understood than physico-chemical processes. The methods section presents spectroscopic techniques and the characterization of microbial P forms, as well as the use of tracers, molecular approaches and modeling of soil-plant systems. The section on processes deals with mycorrhizal symbioses, microbial P solubilization, soil macrofauna, phosphatase enzymes and rhizosphere processes. On the system level, P cycling is examined for grasslands, arctic and alpine soils, forest plantations, tropical forests, and dryland regions. Further, P management with respect to animal production and cropping, and the interactions between global change and P cycling, are treated.
Author: Benjamin L. Turner
Publisher: Cabi
ISBN: 9780851998220
Category : Science
Languages : en
Pages : 399
Get Book Here
Book Description
Phosphorus is essential for life, yet is often the element most limiting for biological productivity. Although most organisms take up phosphorus in an inorganic form, organic forms frequently dominate in soils and aquatic systems. Up to this point, the role of organic phosphorus and mechanisms for its dynamics have been poorly understood. However, recent advances in research have shed new light on the subject and this book brings together these advances. It covers the transformation and characterization of organic phosphorus in both terrestrial and aquatic systems. It will attract a broad range of scientists from several disciplines.
Author: National Phosphorus Research Work Group
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 128
Get Book Here
Book Description
Author: Johan Frederik Dormaar
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 0
Get Book Here
Book Description
The different methods available for the determination of soil organic phosphorus are open to criticism. In the literature, the Kaila and Virtanen method (54) and the Mehta et al. method (67) in particular have been disputed as to which will yield the greater amount of organic phosphorus. The first objective of the present study was to evaluate these two extraction type methods by applying them to some Alberta soils. Subsequently, the study was expanded to determine whether a relationship existed between organic phosphorus and other soil properties including pH, total phosphorus, organic carbon, organic nitrogen and nonsulphate sulphur. The second objective was to evaluate an additional extraction type procedure (49) and two ignition type procedures (59, $4) which have been used by various workers for determining the total organic phosphorus content of soils. The third objective was to ascertain a workable modification of one or more of these methods particularly with the aid of the latest findings in the use of organic matter extractions. Soils from six soil zones of Alberta were sampled in duplicate in the field. The data showed that there was no appreciable difference between the Kaila-Virtanen and Mehta et al. methods for the soils studied. Chemical and statistical analyses suggested that organic phosphorus formed an integral part of organic matter. The ignition procedures appeared to be unsatisfactory as a result of incomplete combustion or of increased solubility of the original inorganic phosphorus. The Kaila and Virtanen method, which uses a mild extractant, seemed to be the best method for determining total organic phosphorus. However, by the addition of known phosphorus bearing compounds it was shown that all methods were very empirical indeed. The Kaila and Virtanen method was improved by making modifications. However, it was reasoned that it was not possible to extract all the organic phosphorus present in a soil with one procedure. Efforts should be turned to obtain and evaluate not only definite forms of organic phosphorus, but also a better appreciation of the bonds between humic acids and phosphorus.
Author: Sterling Robertson Olsen
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 20
Get Book Here
Book Description
Author: A. F. Harrison
Publisher: C.A.B. International
ISBN:
Category : Science
Languages : en
Pages : 276
Get Book Here
Book Description
Methodology. Relationships between total organic P and other soil propeties. Effects of climate and soil drainage. Effects of land class and vegetation type. Seasonal variation. Variation with soil type. Variation with soil parent material. Distribution in soil profiles. prediction of content in surface soils. Effects of land-management practices. Mobility in soils. Weathering and pedogenesis. Total quantity in the soil profile. Chemical nature. Association with organic matter. Importance in plant nutrition. Mineralization in soils. The release of inorganic P from organic detritis.
Author: Y. Chen
Publisher: Springer Science & Business Media
ISBN: 9400944268
Category : Technology & Engineering
Languages : en
Pages : 312
Get Book Here
Book Description
The use of organic residues as a means of maintaining and increasing soil fertility is of long-standing. This tradition has been somewhat neglected since the introduc tion of mineral fertilizers at low cost. More and more farmers and scientists are now showing renewed interest in the proper and effective use of org~tnic residues, composts and other recycled organic additives. The role and function of organic amendments in modern agricultural systems have become topics of major interest in the scientific and agricultural communities. Research work on residue disposal has provided new concepts on the interaction between organic components and soils as well as new handling technologies (e. g. pelletizing of organic residues). The trend to conserve energy has led scientists to study the minimal tillage system, to find ways of replacing conventional inorganic fertilizers with natural organic prod ucts or microbial preparations, and to develop new composting methods. The drive to achieve higher yields in commercial greenhouse farming has led to a search for optimum substrates as growth media and for improved management techniques. This has led to the introduction of organic substitutes for peat, nota bly those originating from agricultural wastes. Another important aspect is the current interest in organic farming, where use of synthetic chemicals is avoided or prohibited. An increasing percentage of the population in highly developed countries is willing to pay premium prices for food produced on soils where inorganic fertilizers and other agricultural chemicals have not been used.
