Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather
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Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather
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Author : Stephen L. Rawlins
language : en
Publisher:
Release Date : 1968
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather written by Stephen L. Rawlins and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Soil moisture categories.
The following advances in technology for measurement of water potential are described: (1) A thermocouple for direct attachment to plant leaves; (2) A microchamber for studying plant responses to environment is described. Light intensity and duration, ambient temperature, relative humidity, and CO2 concentration are controlled. Transpiration, CO2 assimilation, and plant and soil water potential are measured. Data for the ratio of transpiration to CO2 assimilation for cotton are given. Moderate salinity increased this ratio. Description of a contact closure distributor to make a data acquisition system serve as a control device as well as a recorder is given. Also described is a tape editor for handling output data from the system. Preliminary results from experiments to determine how plants integrate time varying salinity indicate that transpiration per unit leaf area is decreased by salinity. (Author).
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather
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Author : S. L. Rawlins
language : en
Publisher:
Release Date : 1968
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather written by S. L. Rawlins and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Soil moisture categories.
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather
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Author : Stephen L. Rawlins
language : en
Publisher:
Release Date : 1966
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather written by Stephen L. Rawlins and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Evaporation categories.
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather
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Author :
language : en
Publisher:
Release Date : 1966
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.
A laboratory technique is described for independent measurement of the total soil water potential and its components, based on the principles of the soil psychrometer and the porous plate apparatus. Only a negligible quantity of soil water is displaced. Such data are used to study interactions of the water potential New plant growth chambers are being built at Riverside to study the transport of water from the soil to the atmosphere through plants. The sunlit plastic-enclosed chambers have provisions for control of temperature, humidity, CO2 concentration, light intensity, and air velocity. Each chamber will be 20 feet high, with nearly 10 feet below the soil surface level to accommodate deep soil columns. A pepper plant was grown through three irrigation cycles in a soil column 130 cm deep; soil water potential was measured with tensiometers and a thermocouple psychrometer; plant water potential was inferred from a calibrated beta gauge; transpiration was measured by weighing the soil-plant system. Water movement in the transpiration stream was in the direction of the water potential gradient. Regardless of the distribution of water in the soil, transpiration was unaffected by declining soil water until it reached a level corresponding to about -8 bars soil water potential. Beyond this, transpiration decreased linearly with soil water content to a soil water potential of -37 bars, at which time the plant water potential was below -50 bars and transpiration was essentially zero. After irrigation, the plant regained full turgor. (Author).
Report To Collaborators
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Author : Regional Salinity Laboratory (U.S.)
language : en
Publisher:
Release Date : 1960
Report To Collaborators written by Regional Salinity Laboratory (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Plants categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1964
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Aeronautics categories.
Technical Abstract Bulletin
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Author : Defense Documentation Center (U.S.)
language : en
Publisher:
Release Date : 1967
Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Science categories.
Government Wide Index To Federal Research Development Reports
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Author :
language : en
Publisher:
Release Date : 1967
Government Wide Index To Federal Research Development Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Government publications categories.
U S Government Research Reports
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Author :
language : en
Publisher:
Release Date : 1962
U S Government Research Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Science categories.
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather
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Author : Regional Salinity Laboratory (U.S.)
language : en
Publisher:
Release Date : 1962
Water Transfer From Soil To The Atmosphere As Related To Soil Properties Plant Characteristics And Weather written by Regional Salinity Laboratory (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Evaporation (Meteorology) categories.
An investigation was made of major interrelated factors which influence the transfer of water from soil through plants to the atmosphere. Results are reported from three studies: (1) effect of temperature on relative vapor pressure of water in soil; (2) relation of psychrometric to membran us measurements of water in soil; and (3) evaporation from soil. (Author).