MARC details
| 000 -LEADER |
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| fixed length control field |
02865nam a22001817a 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20210519144907.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
210519b ||||| |||| 00| 0 eng d |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
e-book (MDP) |
| 100 ## - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Kirchmann, H. |
| 245 ## - TITLE STATEMENT |
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| Title |
Nutrients in Organic Farming: |
| Remainder of title |
are there advantages from the exclusive use of organic manures and untreated minerals? / |
| Statement of responsibility, etc |
Holger Kirchmann and Megan H. Ryan |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
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| Place of publication, distribution, etc |
Australia : |
| Name of publisher, distributor, etc |
Swedish University of Agricultural Sciences, |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
17 p. : |
| Other physical details |
ill. ; |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc |
Includes bibliographical references. |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc |
Abstract<br/>Nutrient additions on organic farms are designed to maintain soil fertility, but not to directly feed plants.<br/>Hence, nutrients are applied in organic or low solubility inorganic forms in the belief that plants will<br/>obtain balanced nutrition through the actions of soil microbes. This review examines the implications of<br/>organic farming fertiliser practices for the sustainability of farming systems using two contrasting<br/>regions, Europe and Australia. In both these regions, mean yields are generally 20-45% lower on organic<br/>farms than conventional farms primarily due to reduced levels of plant available nutrients. Changes in the<br/>soil biological community do not overcome this limitation. Nutrient inputs are lower on organic farms,<br/>although in Europe there is a tendency on organic farms for increased application of purchased, approved,<br/>nutrient sources other than fodder. However, these inputs simply allow organic farms to gain nutrients<br/>that originated from conventional farms. If organic farming were to be widely adopted, lower yields<br/>would require more land (25-82%) to sustain production. In Europe, organic practices increase nitrate<br/>leaching, both per unit area and per unit of food produced, due to lower N use efficiency. Despite their<br/>aim of maximizing nutrient recycling, organic farming systems recycle only on-farm wastes and approved<br/>food wastes, with most municipal wastes excluded due to concerns about pollutants. In future, easily<br/>soluble inorganic fertilizers will be extracted from organic wastes through new nutrient recovery<br/>technologies and this will make conventional agriculture more sustainable whereas organic farming<br/>excludes itself from non-farm recycling, no matter how environmentally clean and safe the new fertilizer<br/>products are. In conclusion, the current promotion of organic principles irrespective of environmental<br/>outcomes means organic farming has become an aim in itself. This approach is ideological, not scientific,<br/>and may exclude other more effective solutions to the environmental problems afflicting current<br/>agricultural systems |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
1. Nitrogen input 2. Soil fertility, 3.Yield 4.Waste recycling, 5. Rock phosphate, 6. Nitrate leaching, 7. Nutrient recycling, 8. Fertilizers |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Ryan, M. H. |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
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| Koha item type |
E-Book |
