Influence Of Variable Sar Within The Root Zone On Water Uptake Nutrition And Growth Of Bean Plants
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Influence Of Variable Sar Within The Root Zone On Water Uptake Nutrition And Growth Of Bean Plants
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Author : Feyis Omar Dappo Quintero
language : en
Publisher:
Release Date : 1971
Influence Of Variable Sar Within The Root Zone On Water Uptake Nutrition And Growth Of Bean Plants written by Feyis Omar Dappo Quintero and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Beans categories.
Influence Of Water Relations And Growth Rate On Plant Element Uptake And Distribution
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Author : Maria Greger
language : en
Publisher:
Release Date : 2006
Influence Of Water Relations And Growth Rate On Plant Element Uptake And Distribution written by Maria Greger and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Plants categories.
Current Programs
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Author :
language : en
Publisher:
Release Date : 1974
Current Programs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Engineering categories.
Optimizing The Physical And Nutritional Environment Of Unleached Root Zones
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Author : Curtis Brownell Adams
language : en
Publisher:
Release Date : 2010
Optimizing The Physical And Nutritional Environment Of Unleached Root Zones written by Curtis Brownell Adams and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Electronic dissertations categories.
Unleached root-zones represent an environmental ideal by eliminating wasteful leaching of nutrients and water. NASA grows plants in space in unleached root-zones, incorporating polymer-coated fertilizer (PCF) into a ceramic media (Turface or Profile). However, lack of growth productivity in space has led to the need for research to improve the nutritional and physical environment of the root-zone, which is the objective of this research. PCF types are diverse in release characteristics and the effects of temperature and substrate water content have not been well characterized. In spite of widespread use, studies on chemical properties and applied studies to verify soil physical models of ceramic media have been limited. We quantified the release rate of three widely-used types of PCF (Polyon, Nutricote, and Osmocote) in water and in sand over a wide range of temperature (5, 15, 20, 30, and 40°C). Results indicated that substrate water content had a minimal effect on release rates. Nutricote fertilizers were the most consistent in releasing individual nutrients with temperature and over time. Polyon fertilizers had the slowest release rates relative to the manufacturer's specifications, but a relatively linear response to temperature. Osmocote fertilizers rapidly released nutrients at all temperatures. For more efficient PCF use, we present a comprehensive model that couples models to predict plant growth and PCF nutrient release rates. This model is based on phosphorus release, the nutrient found to be limiting to PCF-fertilized plants. The efficacy of the model to accurately predict PCF application rates was verified with a growth trial. In ceramic media, relative media-sorbed nutrient concentrations were highly variable from bag to bag. Excesses of manganese, boron, magnesium, and sulfur in the media induced nutrient imbalances in plant tissues. Rinsing and soaking procedures on the media helped mitigate these nutrient imbalances. Ceramic media also interacted with added fertilizer ions. Copper, phosphorus, and zinc ions were largely removed from solution by these interactions. We also used plants to extract water from root-zones of ceramic media to characterize plant-available water and water supply dynamics. The results suggest that soil physical models may be used to predict plant-available water in ceramic media.
The Analysis And Simulation Of Water Transfer Through The Soil Root Domain
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Author : Namik Kemal Kilic̜
language : en
Publisher:
Release Date : 1973
The Analysis And Simulation Of Water Transfer Through The Soil Root Domain written by Namik Kemal Kilic̜ and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Plant-water relationships categories.
Influence Of Nitrogen On The Root Disease Of Bean Caused By Fusarium Solani F Phaseoli
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Author : Kurt Ernest Weinke
language : en
Publisher:
Release Date : 1962
Influence Of Nitrogen On The Root Disease Of Bean Caused By Fusarium Solani F Phaseoli written by Kurt Ernest Weinke and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Bean root rot categories.
Growth Water Relations And Nutrient Uptake Of Bean Seedlings
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Author : JAMES F. DAT
language : en
Publisher:
Release Date : 1994
Growth Water Relations And Nutrient Uptake Of Bean Seedlings written by JAMES F. DAT and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Bibliography Of Agriculture
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Author :
language : en
Publisher:
Release Date : 1973
Bibliography Of Agriculture written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Agriculture categories.
Root Growth Morphological And Physiological Characteristics Of Subtropical And Temperate Vegetable Crops Grown In The Tropics Under Different Root Zone Temperature
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Author : Jie He
language : en
Publisher:
Release Date : 2016
Root Growth Morphological And Physiological Characteristics Of Subtropical And Temperate Vegetable Crops Grown In The Tropics Under Different Root Zone Temperature written by Jie He and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Science categories.
Root growth and morphology are important for maximizing water uptake and mineral absorption. Similar to the plants grown in the soil, in a soilless culture such as an aeroponic system, the amount of water and nutrient available to a plant is determined by the root surface area and volume of nutrient solution with which its roots are in contact. Furthermore, plant roots can alter their nutrient acquisition capacity by adjusting their morphological and/or physiological characteristics to meet changes in shoot nutrient demand in response to environmental stress. Subtropical and temperate vegetables have successfully been grown aeroponically in the tropics by simply cooling the root zone (RZ) while their aerial portions are subjected to fluctuating atmospheric temperatures. This paper focused on RZ temperature (RZT) on root and shoot growth, and root morphology of subtropical and temperate vegetable crops grown in the tropics. The impacts of RZT on water relations as well as nitrate (NO3−) uptake and assimilation of these vegetable crops were also discussed.
The Relation Between Oxygen And Water Uptake By Roots Of Intact Plants
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Author : Cephas Bernard Holder
language : en
Publisher:
Release Date : 1978
The Relation Between Oxygen And Water Uptake By Roots Of Intact Plants written by Cephas Bernard Holder and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Plants categories.