Spatial Variability of Field-measured Soil-water Properties PDF Download

Author: Donald R. Nielsen
Publisher:
ISBN:
Category : Groundwater flow
Languages : en
Pages : 45

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Author: Jan Gliński
Publisher: Springer Science & Business Media
ISBN: 9048135842
Category : Technology & Engineering
Languages : en
Pages : 1075

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Book Description
This Encyclopedia of Agrophysics will provide up-to-date information on the physical properties and processes affecting the quality of the environment and plant production. It will be a "first-up" volume which will nicely complement the recently published Encyclopedia of Soil Science, (November 2007) which was published in the same series. In a single authoritative volume a collection of about 250 informative articles and ca 400 glossary terms covering all aspects of agrophysics will be presented. The authors will be renowned specialists in various aspects in agrophysics from a wide variety of countries. Agrophysics is important both for research and practical use not only in agriculture, but also in areas like environmental science, land reclamation, food processing etc. Agrophysics is a relatively new interdisciplinary field closely related to Agrochemistry, Agrobiology, Agroclimatology and Agroecology. Nowadays it has been fully accepted as an agricultural and environmental discipline. As such this Encyclopedia volume will be an indispensable working tool for scientists and practitioners from different disciplines, like agriculture, soil science, geosciences, environmental science, geography, and engineering.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 44

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Book Description
A 91-m transect was set up in an irrigated field near Las Cruces, New Mexico to investigate the spatial variability of unsaturated soil properties. A total of 455 sampling points were monitored along a grid consisting of 91 stations placed 1 m apart by 5 depths per station. Post-irrigation soil water tension and water content measurements were recorded over 45 days at 11 time periods. The instantaneous profile was used to estimate the unsaturated hydraulic conductivity at the 455 sampling points. Fifty soil samples were also taken for analyzing sand, silt, and clay content distributions. The spatial and temporal variability of soil water tension and water content were investigated along with the spatial variability of parameters of an unsaturated hydraulic conductivity model. Results of the analysis show that spatial variation in soil water tension and water content is consistent with the soil texture spatial variability. In addition, the spatial distribution of the estimated parameter value of unsaturated hydraulic conductivity reflects the soil texture distribution. Using the statistics of the estimated hydraulic parameter values, a stochastic soil water tension model was employed to reproduce the variability of observed soil water tension. Although many assumptions were made, the results of the simulation appear promising.

Author: R. Calvet
Publisher: Editions Quae
ISBN: 9782738002846
Category : Technology & Engineering
Languages : en
Pages : 584

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The contributions of this symposium on the relation agriculture-nitrogen-water deal with the economical aspects (cost evaluation and cost repartition), the quantitative approach of the nitrogen biochemical cycle, farming systems and nitrogen manegement, and land utilization, nitrogen management and water quality

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Most mine detection sensors are affected by soil properties such as water content, temperature, electrical conductivity, and dielectric constant The most important of these is water content since it directly influences the three other properties The variability of these properties may be such that either potential land mine signatures are overshadowed or false alarms result In this paper we present the results of field measurements in the Netherlands, Panama, and New Mexico on spatial variability of soil water content We also discuss how the variability of soil water content affects the soils electrical conductivity and dielectric constant and the resulting response of a ground penetrating radar system.

Author: J. David Cooper
Publisher: John Wiley & Sons
ISBN: 1119106028
Category : Science
Languages : en
Pages : 368

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Book Description
This book is written for all those involved in measurement of soil water phenomena, whether they be environmental scientists, field technicians, agronomists, meteorologists, hydrogeologists, foresters, physical geographers, civil or water engineers or students in these subjects. It contains a comprehensive description of all the major methods used for measurement of soil water content and potential, solute concentration, transport and balance of water and solutes, including recharge to groundwater aquifers. The emphasis is firmly on techniques which can be applied in the field or on samples obtained from the field. The theory and practice of the workings of the main instruments and methods available is described, along with practical tips on surmounting some of the main difficulties and explanations of many commonly encountered jargon words.

Author: Ayman Abdallah Ahmed Suleiman
Publisher:
ISBN:
Category : Crops and soils
Languages : en
Pages : 330

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Book Description

Author: Philip J. Schoeneberger
Publisher: Government Printing Office
ISBN: 9780160915420
Category : Soils
Languages : en
Pages : 300

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Book Description
NOTE: NO FURTHER DISCOUNT FOR THIS PRINT PRODUCT-- OVERSTOCK SALE -- Significantly reduced list price USDA-NRCS. Issued in spiral ringboundbinder. By Philip J. Schoeneberger, et al. Summarizes and updates the current National Cooperative SoilSurvey conventions for describing soils. Intended to be both currentand usable by the entire soil science community."

Author: Donald R. Nielsen
Publisher: Bernan Press(PA)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 264

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Book Description
ISSS congress geostatistics

Author: Daniel Hillel
Publisher: Elsevier
ISBN: 0323152139
Category : Technology & Engineering
Languages : en
Pages : 400

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Book Description
Applications of Soil Physics deals with the applications of soil physics and covers topics ranging from infiltration and surface runoff to groundwater drainage, evaporation from bare-surface soils, and uptake of soil moisture by plants. Water balance and energy balance in the field are also discussed, along with tillage and soil structure management. The development and extension of Penman's evaporation formula is also described. This book is comprised of 14 chapters and begins with a systematic description of the field-water cycle and its management, with emphasis on infiltration and runoff; redistribution and drainage; evaporation and transpiration; and irrigation and tillage. Subsequent chapters focus on transpiration from plant canopies; freezing phenomena in soils; scaling and similitude of soil-water phenomena; spatial variability of soil physical properties; and movement of solutes during infiltration into homogeneous soil. Concepts of soil-water availability to plants are considered, together with principles of irrigation management and the advantages and limitations of drip irrigation. This monograph is intended for upper-level undergraduate and graduate students of the environmental, engineering, and agronomic sciences.