Quantifying Differences In Soil Structure Induced By Farm Management PDF Download
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Author | : Peter Droogers |
Publisher | : |
Total Pages | : 134 |
Release | : 1997* |
Genre | : |
ISBN | : 9789054857389 |
Download Quantifying Differences in Soil Structure Induced by Farm Management Book in PDF, ePub and Kindle
Methodology for defining sustainable land management practices is increasingly needed to overcome environmental problems and to maintain production potentials. From the large amount of definitions for sustainable management the following was used here: "Sustainable land management combines technologies, policies and activities aimed at integrating socio- economic principles with enviromnental concerns so as to simultaneously: (i) maintain or enhance production and services; (ii) reduce the level of production risk; (iii) protect the potential of natural resources and prevent degradation of soil and water quality; (iv) be economically viable and (v) socially acceptable". Indicators to quantify sustainability are used to analyse the effects of different management types on the soil structure within one soil series in the Netherlands, a loamy, mixed, mesic, Typic Fluvaquent. It is logical to concentrate on soil structure when evaluating and comparing the effects of different management practices as they reflect management practices at an integrated level. Comparison was focused on three soil structure types, formed by different management practices. (i) A biodynamic system (Bio) where no chemical crop protection or commercial fertiliser has been applied since 1924. Animal manure and a crop rotation system with clover are intended to supply the required nutrients. (ii) A conventional system (Conv) representing a management system that is most common in the region. (iii) A system which has been permanently meadow since 1947 (Perm). The biodynamic and conventional system were compared by converting "static" soil parameters, like organic matter content, bulk density, hydraulic characteristics, into a "dynamic" assessment by using a simulation model to calculate water-limlited productivity. A thorough soil characterisation was made, including morphological and physical characterisation as well as monitoring of soil water contents and groundwater levels. Results of the comparison between simulated and measured moisture contents were such that the model was considered to be adequately validated. The simulated water-limited productivity for potatoes was significantly higher for the biodynamic system, indicating a favourable effect of the higher organic matter content. Modern mechanised agricultural practices require soils to be able to be subjected to tillage and traffic, without adverse effects on soil structure. Threshold values for workability and trafficability were obtained for the three management types. Workability by the Atterberg test, trafficability by penetrometer measurements and an additional field-traffic experiment. Threshold values for Conv were most favourable, i.e. during relatively wet conditions Conv could still be tilled and trafficked. Periods of workability and trafficability were obtained by combining measured threshold values with simulated moisture contents. Conv had the longest workable and trafficable period in a year followed by Perm and Bio, respectively. Soil survey could focus in future on defining sustainable forms of landuse, considering that soils within one soil series are not similar. Farm management information combined with quantifying the associated soil structure types by simulation models, can form the basis for defining sustainable management systems for the soil series being studied. As many soil surveys are completed all over the world, the proposed procedure appears to be a worthwhile continuation of the rich tradition of soil survey research.
Author | : P. Droogers |
Publisher | : |
Total Pages | : 0 |
Release | : 1997 |
Genre | : |
ISBN | : |
Download Quantifying Differences in Soil Structure Induced by Farm Management Book in PDF, ePub and Kindle
Methodology for defining sustainable land management practices is increasingly needed to overcome environmental problems and to maintain production potentials. From the large amount of definitions for sustainable management the following was used here: "Sustainable land management combines technologies, policies and activities aimed at integrating socio- economic principles with enviromnental concerns so as to simultaneously: (i) maintain or enhance production and services; (ii) reduce the level of production risk; (iii) protect the potential of natural resources and prevent degradation of soil and water quality; (iv) be economically viable and (v) socially acceptable". Indicators to quantify sustainability are used to analyse the effects of different management types on the soil structure within one soil series in the Netherlands, a loamy, mixed, mesic, Typic Fluvaquent. It is logical to concentrate on soil structure when evaluating and comparing the effects of different management practices as they reflect management practices at an integrated level. Comparison was focused on three soil structure types, formed by different management practices. (i) A biodynamic system (Bio) where no chemical crop protection or commercial fertiliser has been applied since 1924. Animal manure and a crop rotation system with clover are intended to supply the required nutrients. (ii) A conventional system (Conv) representing a management system that is most common in the region. (iii) A system which has been permanently meadow since 1947 (Perm). The biodynamic and conventional system were compared by converting "static" soil parameters, like organic matter content, bulk density, hydraulic characteristics, into a "dynamic" assessment by using a simulation model to calculate water-limlited productivity. A thorough soil characterisation was made, including morphological and physical characterisation as well as monitoring of soil water contents and groundwater levels. Results of the comparison between simulated and measured moisture contents were such that the model was considered to be adequately validated. The simulated water-limited productivity for potatoes was significantly higher for the biodynamic system, indicating a favourable effect of the higher organic matter content. Modern mechanised agricultural practices require soils to be able to be subjected to tillage and traffic, without adverse effects on soil structure. Threshold values for workability and trafficability were obtained for the three management types. Workability by the Atterberg test, trafficability by penetrometer measurements and an additional field-traffic experiment. Threshold values for Conv were most favourable, i.e. during relatively wet conditions Conv could still be tilled and trafficked. Periods of workability and trafficability were obtained by combining measured threshold values with simulated moisture contents. Conv had the longest workable and trafficable period in a year followed by Perm and Bio, respectively. Soil survey could focus in future on defining sustainable forms of landuse, considering that soils within one soil series are not similar. Farm management information combined with quantifying the associated soil structure types by simulation models, can form the basis for defining sustainable management systems for the soil series being studied. As many soil surveys are completed all over the world, the proposed procedure appears to be a worthwhile continuation of the rich tradition of soil survey research.
Author | : Sally Logsdon |
Publisher | : John Wiley & Sons |
Total Pages | : 208 |
Release | : 2020-01-22 |
Genre | : Technology & Engineering |
ISBN | : 0891189564 |
Download Quantifying and Modeling Soil Strucure Dynamics Book in PDF, ePub and Kindle
Quantifying and Modeling Soil Structure Dynamics emphasizes a systems approach to how soil structure changes in response to inputs and to the environment. Soil structure is a dynamic, complex system affected by tillage, wheel traffic, roots, soil life, shrink–swell, and freeze–thaw. In turn, soil structure affects root growth and function, soil fauna, solute transport, water infiltration, gas exchange, thermal and electrical conductivities, traffic bearing capacity, and more. Ignoring soil structure or viewing it as “static” can lead to poor predictions and management. Readers will especially appreciate the description of soil structure influence on endpoints, such as environmental contamination and efficient water use, and how models should be adjusted to include dynamic soil structure components for accurate outputs.
Author | : Marie-colette Van Lieshout |
Publisher | : World Scientific |
Total Pages | : 185 |
Release | : 2000-07-12 |
Genre | : Mathematics |
ISBN | : 1783262508 |
Download Markov Point Processes And Their Applications Book in PDF, ePub and Kindle
These days, an increasing amount of information can be obtained in graphical forms, such as weather maps, soil samples, locations of nests in a breeding colony, microscopical slices, satellite images, radar or medical scans and X-ray techniques. “High level” image analysis is concerned with the global interpretation of images, attempting to reduce it to a compact description of the salient features of the scene.This book takes a stochastic approach. It studies Markov object processes, showing that they form a flexible class of models for a range of problems involving the interpretation of spatial data. Applications can be found in statistical physics (under the name of “Gibbs processes”), environmental mapping of diseases, forestry, identification of ore structure in materials science, signal analysis, object recognition, robot vision, and interpretation of images from medical scans or confocal microscopy.
Author | : Juan Cornejo |
Publisher | : Editions Quae |
Total Pages | : 492 |
Release | : 2000 |
Genre | : Technology & Engineering |
ISBN | : 9782738009227 |
Download Pesticide/Soil Interactions Book in PDF, ePub and Kindle
This joint-authored book brings together approximately 50 current research methods developed and implemented in research laboratories in Europe to study pesticide/soil interactions. Its usefulness for researchers, teachers and professionals concerned by the environmental impact of pesticides was one of the major elements taken into consideration when structuring this book. It will be a valuable asset to chemists, physical chemists, biochemists, biologists and geologists interested in studying the behaviour of pesticides in soils.
Author | : Apostolos Papadopoulos |
Publisher | : |
Total Pages | : 532 |
Release | : 2007 |
Genre | : Organic farming |
ISBN | : |
Download Quantifying Physical Aspects of Soil Structure Asociated with Organic Management Practices Book in PDF, ePub and Kindle
Author | : Wilfred Otten |
Publisher | : Burleigh Dodds Agricultural Sc |
Total Pages | : 420 |
Release | : 2020-07-28 |
Genre | : Technology & Engineering |
ISBN | : 9781786764263 |
Download Advances in Measuring Soil Health Book in PDF, ePub and Kindle
This volume begins with a review of advances in measuring soil biological activity. Parts 2 and 3 survey developments in measuring soil physical and chemical properties. The collection concludes by reviewing soil health indicators and decision support systems for improving soil management.
Author | : |
Publisher | : |
Total Pages | : 1054 |
Release | : 1998 |
Genre | : Fertilizers |
ISBN | : |
Download Soils and Fertilizers Book in PDF, ePub and Kindle
Author | : Alfred E. Hartemink |
Publisher | : Springer |
Total Pages | : 438 |
Release | : 2016-04-06 |
Genre | : Nature |
ISBN | : 3319282956 |
Download Digital Soil Morphometrics Book in PDF, ePub and Kindle
This book is about digital soil morphometrics which is defined as the application of tools and techniques for measuring, mapping and quantifying soil profile properties, and deriving depth functions of soil properties. The book is structured along four research topics: (i) Soil profile properties, (ii) Soil profile imaging, (iii) Soil depth functions, and (iv) Use and applications. The pedon is at the heart of digital soil morphometrics. The use of digital soil morphometrics exceeds the pedology and soil classification purpose that it currently serves – it is used in rapid soil assessment that are needed in a range of biophysical studies. Digital soil morphometrics has the potential to enhance our understanding of soils and how we view them. The book presents highlights from The IUSS Inaugural Global Workshop on Digital Soil Morphometrics held in June 2015 in Madison, USA.
Author | : Hans Jenny |
Publisher | : Courier Corporation |
Total Pages | : 322 |
Release | : 1994-01-01 |
Genre | : Science |
ISBN | : 0486681289 |
Download Factors of Soil Formation Book in PDF, ePub and Kindle
Masterpiece offers a detailed discussion of the nature of the earth's terrestrial environment, and a method of subdividing and studying it. 1941 edition.