Download or read book Probe for in situ soil moisture measurement written by P. E. Wakeman and published by . This book was released on 1978 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A New Probe for in Situ TDR Moisture Measurement written by and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper explains the development of a new Time Domain Reflectometry (TDR) probe which can be inserted through waste and soil to a depth of 14 feet with minimal labor and minimal soil disturbance. TDR has been used for 10 years as a method for measuring soil moisture contents. Conventional TDR probes are 30 centimeters long and therefore are difficult to insert at depths below a few feet. Recently, a probe has been developed which can be inserted to depths of 14 feet with the use of a vibratory drill. Quality objectives for the instrument, preliminary data, and suggestions for future developments are presented.
Download or read book A Prototype Microwave Probe and Reflectometer for in Situ Measurement of Soil Electrical Properties written by Joel B. Everett and published by . This book was released on 1996 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Probe Compared with Other Soil Moisture Measurement Methods written by Robert A. Merriam and published by . This book was released on 1959 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil moisture Measurement written by Howard William Lull and published by . This book was released on 1955 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Water Assessment by the Neutron Method written by CSIRO (Australia) and published by CSIRO Publishing. This book was released on 1981 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Application in agriculture, Forestry and Environmental Science. Neutron moisture meter theory. Instrument design. Accuracy, bias and precision. Calibration. Field installation and maintenance. Site selection and representivity. Field practice, data acquisition and processing. Safety aspects.
Download or read book Advanced Agricultural Instrumentation written by W.G. Gensler and published by Springer. This book was released on 2011-10-05 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The photosynthetic process of higher plants converts carbon dioxide, water, and, light quanta into reduced sugars. The enzymes which catalyze this conversion are contained within the chloroplasts and can be thought of as split into two distinct groups. In one group are the enzymes of the IIlightll reactions, which harvest the light, oxidize water and generate two energy-rich intermediates, ATP and NADPH. These two intermediates plus carbon dioxide are the substrates for the second group, the IIdarkll reactions or Cal vi n cycle, which produce the reduced sugars. The chloroplast is completely bounded by an outer membrane. There is a separate, highly convoluted membrane system, the thyla koid system, enclosed within the chloroplast. The enzymes of the light reactions are physically associated with the thylakoid mem branes, while the Calvin cycle enzymes are free-floating within the stroma, or soluble part of the chloroplast (Fig. 1). GRANA MEMBRANES ARE REG I ONS WHERE THE MEMBRANES ARE APPRESSED ON EACH OTHER MEMBRANES WH ICH ARE UNAPPRESSED THT1.AKO ID t1EHBRANE ARE STROMA MEMBRANES ( ) (VES I OJLAR) (c _______ Figure 1. Schematic representation of the photosynthetic process in plant chloroplasts. PC and PCred are the oxidized and reduced ox forms of plastocyanin. PQ and PQH2 are plastoquinone and plasto quinol. For explanation, see text.
Download or read book Soil Water Measurement written by J. David Cooper and published by John Wiley & Sons. This book was released on 2016-01-19 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Soil Moisture Measurement with the Neutron Method written by Cornelius H. M. Van Bavel and published by . This book was released on 1963 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Portable Four electrode Probe for Measuring Soil Moisture written by George S. Taylor and published by . This book was released on 1950 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICT for Smart Water Systems Measurements and Data Science written by Andrea Scozzari and published by Springer Nature. This book was released on 2020-11-28 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, Information and Communication Technologies (ICT) have a pervasive presence in almost every aspect of the management of water. There is no question that the collection of big data from sensing and the insights gained by smart analytics can bring massive benefits. This book focuses on new perspectives for the monitoring, assessment and control of water systems, based on tools and concepts originating from the ICT sector. It presents a portrait of up-to-date sensing techniques for water, and introduces concepts and implications with the analysis of the acquired data. Particular attention is given to the advancements in developing novel devices and data processing approaches. The chapters guide the reader through multiple disciplinary contexts, without aiming to be exhaustive, but with the effort to present relevant topics in such a highly multi-disciplinary framework. This book will be of interest to advanced students, researchers and stakeholders at various levels.
Download or read book An Introduction to Environmental Biophysics written by Gaylon S. Campbell and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: From reviews of the first edition: "well organized . . . Recommended as an introductory text for undergraduates" -- AAAS Science Books and Films "well written and illustrated" -- Bulletin of the American Meteorological Society
Download or read book Soil Moisture Determinations Using Capacitance Probe Methodology written by and published by . This book was released on 1998 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determining soil moisture content by measuring the dielectric constant of the soil is not a new concept. However, determining the dielectric constant by measuring capacitance directly rather than through the use of time domain reflectometry (TDR) systems is a relatively new approach to soil moisture measurements. A unique probe assembly and a readout device that measures voltage drop and phase shift were developed and used for direct capacitance measurements. The capacitance measurement was calibrated using known capacitors and resistors. Soil moisture measurements were calibrated by adding known amounts of distilled water to dry soil enclosed in a known volume. The effect of salinity on the measurement technique was evaluated. Once calibration had been accomplished, actual soil moisture measurements at three test depths through an entire winter's freeze-thaw cycle demonstrated the feasibility of using this capacitance measurement system. The dielectric constants measured using this fixed-frequency capacitance measurement system fall within the same general range as the values obtained using TDR equipment with the Topp or Roth general calibration equations, and they could probably be used directly in these equations after minor corrections. The conclusions drawn from these tests are that this measurement technique could and should be developed as an easier, more economical, and more easily automated and calibrated system for soil moisture measurement.
Download or read book Remote Sensing Handbook Three Volume Set written by Prasad Thenkabail and published by CRC Press. This book was released on 2018-10-03 with total page 2304 pages. Available in PDF, EPUB and Kindle. Book excerpt: A volume in the three-volume Remote Sensing Handbook series, Remote Sensing of Water Resources, Disasters, and Urban Studies documents the scientific and methodological advances that have taken place during the last 50 years. The other two volumes in the series are Remotely Sensed Data Characterization, Classification, and Accuracies, and Land Reso
Download or read book Instrumentation for Moisture Measurement bases Subgrades and Earth Materials sensor Evaluation written by G. A. Matzkanin and published by . This book was released on 1979 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two types of moisture sensors for long term in situ monitoring of moisture in highway subgrade soils have been developed and field tested. One sensor is based on the relationship between the soil moisture and the dielectric constant of the soil which affects the capacitance as sensed by a pair of embedded electrodes. The other sensor is based on the nuclear magnetic resonance of hydrogen of the water molecules in the soil. Results of the evaluation program show that the tested sensors are capable of determining soil moisture content in the range of 20% to 30% with an accuracy in the field of ±2% oven dry moisture content and a precision of ±2% oven dry moisture content. The sensors were evaluated in the field for over a year under in-service highways in Arizona and Pennsylvania, and under a test road at the U.S. Army Cold Regions Research Laboratory in New Hampshire. Periodic comparisons were made among the sensor readings and results of other moisture measurements including nuclear probe and gravimetric analysis of borings. Although some discrepancies were observed among the field results, and the field tests were not conclusive, the data obtained with the newly developed sensors appear to be consistent with the indicated moisture conditions.
Download or read book Soil Water Measurement Plant Responses and Breeding for Drought Resistance written by T.T. Kozlowski and published by Elsevier. This book was released on 2012-12-02 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water Deficits and Plant Growth, Volume IV: Soil Water Measurement, Plant Responses, and Breeding for Drought Resistance explores the physiological effects of water deficits on plants and their implications on crop yield, water use, and drought resistance. This book also considers drought-resistance measurements and their application to breeding programs. This volume is organized into eight chapters and begins with an overview of measurement of soil water content and the state of water in soils. Particular emphasis is placed on methods developed from technological advances. The next two chapters focus on the structure and functioning of stomata and stomatal conductance in control of gas exchange. The discussion then shifts to the effects of water supply on photosynthesis, leaf shedding, flow of latex, and nitrogen-fixing root nodules. The final chapter is a comprehensive treatment of plant breeding for drought resistance, emphasizing breeding and testing methods as well as parameters and application to breeding programs of drought resistance. This book is a valuable resource for scientists and investigators in fields such as botany, agronomy, forestry, agriculture, and biology.
Download or read book Agricultural Water Management written by Prashant K. Srivastava and published by Academic Press. This book was released on 2020-11-18 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agricultural Water Management: Theories and Practices advances the scientific understanding, development and application of agricultural water management through an integrated approach. This book presents a collection of recent developments and applications of agricultural water management from advanced sources, such as satellite, mesoscale and climate models that are integrated with conceptual modeling systems. Users will find sections on drought, irrigation scheduling, weather forecasting, climate change, precipitation forecasting, and more. By linking these systems, this book provides the first resource to promote the synergistic and multidisciplinary activities of scientists in hydro-meteorological and agricultural sciences. As agricultural water management has gained considerable momentum in recent decades among the earth and environmental science communities as they seek solutions and an understanding of the concepts integral to agricultural water management, this book is an ideal resource for study and reference. - Presents translational insights into drought, irrigation scheduling, weather forecasting, climate change and precipitation forecasting - Advances the scientific understanding, development and application of agricultural water management - Integrates geo-spatial techniques, agriculture, remote sensing, sustainable water resource development, applications and other diverse areas within earth and environmental, meteorological and hydrological sciences
