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This newspaper page contains 5 articles. Subscribers can read the full text of each article.
Newspaper
Canberra Times
Location
Canberra, Australian Capital Territory, Australia
Date
Aug 30, 1966
Page
6
Pye Laboratory researchers study photosynthesis, leaf and soil factors, and environmental interactions. They focus on how sunlight, water, CO2, humidity, and temperature affect plant growth, aiming for a quantitative physics view of plant environments.
The article surveys plant water transpiration in various conditions, noting windless hot paddocks and water bodies like Lake Burley Griffin as influences. It highlights new techniques for continuous non destructive growth measurement and advanced instruments enabling insights beyond prior limits, aiming to advance understanding of plant physiology and environmental interactions.
The article explains solar energy use by plants, reflecting, heating, and evaporation. It notes photosynthesis is a small energy share, daily energy budgets of a wheat field near Canberra, and a water storage decline of eight inches in the top three feet during a dry period from August 1965.
Plants rely on natural transfer processes to move water CO2 heat and nutrients and to remove excess heat. Turbulent diffusion moves gases in air while viscous and molecular diffusion handle water vapour and solutes. Heat conduction and radiation transfer heat and energy between soil air and the sun.
The article details how scientists study plant environments by measuring heat, CO2, water flows and related variables using special instruments. Automatic electronic equipment and mobile laboratories collect data on wind, temperature, humidity, heat radiation, and soil heat flow during field expeditions in Australia. A computer analyzes vast data sets and helps interpret results back at the lab.
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