Download or read book Irrigation Monitoring Using Soil Water Tension written by and published by . This book was released on 2013 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication discusses the use of granular matrix sensors (GMS) for monitoring soil moisture content. It explains how to install GMS and use the recorded data for irrigation scheduling.
Download or read book Monitoring Soil Moisture for Irrigation Water Management written by Blaine Hanson and published by University of California, Agriculture and Natural Resources. This book was released on 2007 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring soil moisture is an alternate method to water-based balance methods of managing irrigation water. Using this method you can "see" what is going on in the soil and determine answers to some key irrigation management questions: Did enough water infiltrate the soil? Is too much water being applied? What is the water uptake pattern of the roots? When should irrigation take place? What was the depth reached by the irrigation? Includes 24 figures and 7 tables, metric conversions, and an appendix of typical root depths. One of a series of water management handbooks prepared by the UC Irrigation Program.
Download or read book Soil Water Monitoring Measurement written by and published by . This book was released on 1994 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring Irrigation in Western Forest Tree Nurseries written by Stephen E. McDonald and published by . This book was released on 1979 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Irrigation Monitoring with Soil Water Sensors written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Winning with Water written by Gail Richardson and published by . This book was released on 1988 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Water Monitoring written by Phillip Charlesworth and published by . This book was released on 2005 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Irrigation Scheduling written by David Alan Goldhamer and published by . This book was released on 1989 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterizing the soil environment. Soil-based monitoring. Plant-based monitoring. The water budget approach. Irrigation effectiveness. Shallow water tables. Salinity. Implementing and irrigation strategy on the farm.
Download or read book Estimating Soil Moisture by Feel and Appearance written by and published by . This book was released on 1998 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Irrigation Scheduling written by Jennifer Laffan and published by NSW Agriculture. This book was released on 2015-12-01 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scheduling irrigation is about planning when and how much water to apply to a crop to achieve crop production or a particular quality. The principles of scheduling water apply to all crops, however the critical timing, methods and techniques can vary with the crop. This book is about: · the ways in which specific crops respond to stress and the effects of the timing and degree of stress and the growth stage of the crop · evapotranspiration (ET) and crop water use to schedule irrigations · developing an irrigation schedule · terms used to describe the amount of water available to a crop · soil moisture probes and where to locate them · water quality issues to consider. TABLE OF CONTENTS Chapter 1: Introduction Chapter 2: Safety Chapter 3: Environmental Impacts Of Irrigation Chapter 4: The Need For Water Varies Chapter 5: Factors Affecting Evapotranspiration Chapter 6: Scheduling Irrigations Chapter 7: How Soil Holds Water Chapter 8: Data From Soil Moisture Probes Chapter 9: Do You Need A Calibrated Probe? Chapter 10: Implementing A Deficit Strategy Chapter 11: Placement Of Soil Probes Chapter 12: Irrigation Water Quality Appendix 1: Determining PAWC Appendix 2: Determining RAW From Soil Texture Appendix 3: Determining Starting And Final Soil Moisture Appendix 4: Calibration Of Soil Moisture Monitoring Tools Appendix 5: IrriSAT – Weather based scheduling tool Further Information
Download or read book Means to Optimize Soil Water Management Through Monitoring Spatial and Temporal Variability of Geophysical Soil Attributes written by Luan Pan and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "To optimize irrigation water use, temporal and spatial sensor-based data related to soil water content were integrated. Nine locations in a 37-ha agricultural field were selected using field elevation and soil ECa maps for monitoring the soil matric potential and temperature at four depths (18, 48, 79 and 109 cm) with a wireless sensor network. Using a linear regression approach, a series of time-specific equations were developed to quantify both the temporal and spatial soil water stress status through a Water Stress Index (WSI). The WSI was estimated using soil matric potential measurements along with supplemental soil characteristics, such as site-specific soil matric potential corresponding to 25% soil water depletion that was derived based on soil physical properties. Further analysis was performed to quantify the percentage of the field that undergoes a potential shortage in water supply. These results could be used to optimize irrigation scheduling and to assess the potential for variable-rate irrigation. The second study investigated the way in which the WSI prediction quality is affected by the number and placement of temporal soil water content monitoring sites. The concept, potentially, could be used to investigate a variety of site-specific crop management strategies. It was developed to assess WSI predictability in context that the modeled relationship between WSI and spatial field data (ECa and elevation) is not perfect at any given point of time. The established regression model between ECa, field topography maps and WSI from the first study was applied to construct WSI maps representing a specific point in time in six experimental fields with different crop growing conditions located in Nebraska, USA. Artificial regression error models with different degrees of spatial structure were superimposed onto these maps to simulate actual WSI distribution across the fields. Both random and optimized monitoring site placement strategies were evaluated in terms of the ability to predict the simulated WSI maps. The results showed that it was necessary to optimize the selection when the number of monitoring sites was low. However, a random placement method was equally efficient when the number of monitoring sites was high. Careful selection of representative field areas representing significant field areas with extreme conditions should allow only 2 or 3 monitoring sites to produce results with relatively low WSI prediction error.Through the process of water management optimization, it was noted that the ability to detect site-specific water storage capacity is an important task. Since it is related to the change of soil physical properties with depth, a third study was conducted to develop a dynamic scanning of soil profile tools using a galvanic contact resistivity approach. Transmitting and receiving electrodes were configured in an equatorial dipole array. An automated scanner system has been developed and tested in the agricultural field environment with different soil profiles. While operating in the field, the distance between the current injecting and measuring pairs of rolling electrodes was varied continuously from 40 to 190 cm. The resulting scans were evaluated against 1-m deep soil profiles and that of an electromagnetic induction instrument at various depths, up to 3 m." --
Download or read book Soil Physics with HYDRUS written by David E. Radcliffe and published by CRC Press. This book was released on 2018-10-03 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical models have become much more efficient, making their application to problems increasingly widespread. User-friendly interfaces make the setup of a model much easier and more intuitive while increased computer speed can solve difficult problems in a matter of minutes. Co-authored by the software’s creator, Dr. Jirka Šimůnek, Soil Physics with HYDRUS: Modeling and Applications demonstrates one- and two-dimensional simulations and computer animations of numerical models using the HYDRUS software. Classroom-tested at the University of Georgia by Dr. David Radcliffe, this volume includes numerous examples and homework problems. It provides students with access to the HYDRUS-1D program as well as the Rosetta Module, which contains large volumes of information on the hydraulic properties of soils. The authors use HYDRUS-1D for problems that demonstrate infiltration, evaporation, and percolation of water through soils of different textures and layered soils. They also use it to show heat flow and solute transport in these systems, including the effect of physical and chemical nonequilibrium conditions. The book includes examples of two-dimensional flow in fields, hillslopes, boreholes, and capillary fringes using HYDRUS (2D/3D). It demonstrates the use of two other software packages, RETC and STANMOD, that complement the HYDRUS series. Hands-on use of the windows-based codes has proven extremely effective when learning the principles of water and solute movement, even for users with very little direct knowledge of soil physics and related disciplines and with limited mathematical expertise. Suitable for teaching an undergraduate or lower level graduate course in soil physics or vadose zone hydrology, the text can also be used for self-study on how to use the HYDRUS models. With the information in this book, you can run models for different scenarios and with different parameters, and thus gain a better understanding of the physics of water flow and contaminant transport.
Download or read book Microirrigation for Crop Production written by and published by Elsevier. This book was released on 2006-09-28 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microirrigation has become the fastest growing segment of the irrigation industry worldwide and has the potential to increase the quality of food supply through improved water fertilizer efficiency. This book is meant to update the text "Trickle Irrigation, Design, Operation and Management". This text offers the most current understanding of the management criteria needed to obtain maximum water and fertilization efficiency. * Presents a detailed explanation of system design, operation, and management specific to various types of MI systems * Analyzes proper use of irrigation technology and its effect to increase efficiency * Provides an understanding to the basic science needed to comprehend operation and management * Over 150 figures of designs and charts of systems including, surface drip, subsurface drip, spray/microsprinkler, and more
Download or read book Wireless Sensors Network for Measurement of Soil Water Potential written by Peter Ra O and published by LAP Lambert Academic Publishing. This book was released on 2011-10 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the significance of water protection and conservation is still increasing. Information about the state of water in soil is a key component in soil water monitoring, irrigation control systems and its optimization. The purpose of this work is to create a wireless sensor network for the measurement of soil water potential. The work includes the description of measurement methods, selection of appropriate method and its calibration. It also contains hardware and firmware realization of the two types of wireless modules, the end station with sensors and the base station for data reception. The realized application contains a user program which allows data logging, displays actual data or past characteristics and changes the system settings with a possibility to request system for the necessary information.
Download or read book Assistance Robotics and Biosensors written by Fernando Torres and published by MDPI. This book was released on 2018-11-29 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Assistance Robotics and Biosensors" that was published in Sensors
Download or read book Use of Tensiometers for Computer Control of Irrigation for Container grown Plants written by Saadettin Yildirim and published by . This book was released on 1997 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: A Q-COM computer-controlled system along with tensiometers was used to monitor and control irrigation for container-grown, mini-roses (Rosa hybrida 'Meidanclar' and 'Meirutral'). Three different Soil Moisture Tension (SMT) treatments: low tension (3 to 6 kPa), medium tension (9 to 12 kPa), and high tension (15 to 18 kPa) and a Timer Controlled (TC) treatment were chosen and compared. The tensiometers used in this experiment were able to effectively measure soil moisture tension in the root zone of the potted plants. The computer-controlled, irrigation system for container-grown plants was also able to continuously monitor the soil moisture level, call for irrigation in time when the soil required water, and stop the irrigation when an adequate amount was applied. The control system was not always successful at keeping the soil moisture at a pre-set tension range. Control gradually became more erratic and difficult as the tension level increased. The best SMT treatment for control capability was the low tension (3 to 6 kPa) treatment. Stable control of soil moisture tension was not successfully achieved for high SMT (15 to 18 kPa) treatments. As the SMT increased, the quantity of water supplied decreased. Water used was higher for the TC based irrigation treatment than for any of the three SMT based treatments. The mini roses were grown with substantially less water by using SMT based irrigation treatments than with timer control. As time elapsed and the plants grew, the rate of water applied increased for SMT based treatments. Water use rate increased linearly with respect to time for all three SMT treatments during the first 30 days while the rates were nearly constant during the following 23 days. Tensiometers with various inside air volumes were used to sense soil tension. There were no differences between the tensiometers in terms of stability. However, increasing air volume inside the tensiometer probe reduced tensiometer accuracy.
