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Author: Blaine Hanson Publisher: University of California, Agriculture and Natural Resources ISBN: 9781601074812 Category : Technology & Engineering Languages : en Pages : 58
Book Description
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.
Author: Blaine Hanson Publisher: University of California, Agriculture and Natural Resources ISBN: 9781601074812 Category : Technology & Engineering Languages : en Pages : 58
Book Description
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.
Author: M.B. Kirkham Publisher: Academic Press ISBN: 0124200788 Category : Science Languages : en Pages : 599
Book Description
Principles of Soil and Plant Water Relations, 2e describes the principles of water relations within soils, followed by the uptake of water and its subsequent movement throughout and from the plant body. This is presented as a progressive series of physical and biological interrelations, even though each topic is treated in detail on its own. The book also describes equipment used to measure water in the soil-plant-atmosphere system. At the end of each chapter is a biography of a scientist whose principles are discussed in the chapter. In addition to new information on the concept of celestial time, this new edition also includes new chapters on methods to determine sap flow in plants dual-probe heat-pulse technique to monitor water in the root zone. Provides the necessary understanding to address advancing problems in water availability for meeting ecological requirements at local, regional and global scales Covers plant anatomy: an essential component to understanding soil and plant water relations
Author: Saadettin Yildirim Publisher: ISBN: Category : Languages : en Pages : 118
Book Description
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.
Author: Blaine Hanson
Author: Blaine Hanson
Author: Saskatchewan Water Corporation. Operations Division. Irrigation Services
Author: 
Author: M.B. Kirkham
Author: Arnold Ivan Johnson
Author: William J. Walkotten
Author: 
Author: Howard William Lull
Author: Saadettin Yildirim
Author: Gail Richardson