Greenhouse: Effects on R e l a t i v e G r o w t h Rate‚ Net A s s i m i l a t i o n Rate and L e a f Area Ratio G.T. BRUGGINK and E. HEUVELINK Department of Horticulture‚ Agricultural University‚ P.O. Box 30‚ 6700 AA Wageningen (The Netherlands) Publication No. 526 (Accepted for publication 22 October 1986 ) ASR C BT A T Bruggink‚ G.T. and Heuvelink‚ E.‚ 1987. Influence of light on the growth of young tomato‚ cucumber and sweet pepper plants in the greenhouse: effects on relative growth rate‚
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Radioactivity computer research: Instructions and Questions [Note: Links to Bitesize websites may direct you to a ‘home’ page for Radiation and the Universe- click ‘Activity’ for Radioactive Substances and scroll through until you find the appropriate page] 1) Go to http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/radiation/radiocativerev1.shtml . What is an isotope? How many isotopes of hydrogen are there? An isotope is an atoms which are from the same element but have different numbers
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is the largest increasing factor in our world. This factor is the cause of many events in our world. Poverty hunger and war are just some of the immediate effects of increasing population. Among these extreme causes the less immediate events will be seen with air pollution‚ land degradation‚ which is the effect that’ll have the longest term effect on the world. But how can these events are avoided? Is there any hope of stopping this from occurring any further? The largest‚ most identified reason for
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Mutation was induced via a physical agent‚ radiation. 4 levels of radiation—0 kr (control)‚ 10 kr‚ 30 kr‚ and 50 kr—were used in seeds to determine the radiation effects on the growth of Zea mays. Using two duplicate set-ups‚ each‚ planted with 18 seeds per radiation‚ the differences in height were observed from January 29 to March 17 in a 1 to 2-day interval (Mondays-Wednesdays-Fridays). Results show that as radiation increases‚ the potential of plants to grow decreases—0 kr seeds reached the highest
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The factors affecting plant yield: light level Abstract The factors affecting Zea mays‚ maize (C4) and Pisum sativa‚ or pea (C3) plant yield and growth patterns placed under shade and full sunlight were investigated. 20 plantlets placed into four vermiculite compost pots (5 from each plantlet) and submitted to fertilizer or no fertilizer. And after 4 weeks the results showed that maize grown in light with no fertilizer had a higher relative growth rate and root to shoot ratio indicating the allocation
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The Biological Effects of Radiation Whether the source of radiation is natural or man made‚ whether it is a small dose of radiation or a large dose‚ there will be some biological effects. Radiation causes ionizations of atoms‚ which will affect molecules‚ which may affect cells‚ which may affect tissues‚ and so on. Although most people tend to think of biological effects in terms of the effect of radiation on living cells‚ in actuality‚ ionizing radiation‚ by definition‚ interacts only with
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“Solar Radiation and its Effects on Planet Earth” The Sun emits a tremendous amount of energy‚ in the form of electromagnetic radiation‚ into space. If we could somehow build a gigantic ball around the Sun that completely enclosed it‚ and lined that ball with perfectly efficient photovoltaic solar panels‚ we could capture all of that energy and convert it to electricity and be set in terms of Earth ’s energy needs for a very long time. Lacking such a fanciful sphere‚ most of the Sun ’s energy
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EFFECTS OF NITROGEN FIXING PEA PLANTS (Pisum sativum) ON GROWTH OF CORN (Zea mays) Introduction Interactions among plant species‚ particularly negative ones‚ have been a concern in agriculture (Levene 1926‚ Russell 1961). Novoa (1981) suggested that it would be advantageous to rotate certain crops by season‚ grow certain crops together‚ or avoid growing certain crops on the same land. Observations indicated that some crops require specific types of nutrients in contrast to other crop
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Plant Growth and Development Define growth‚ differentiation‚ development‚ dedifferentiation‚ redifferentiation‚ determinate growth‚ meristem and growth rate. (a) Growth It is an irreversible and permanent process‚ accomplished by an increase in the size of an organ or organ parts or even of an individual cell. (b) Differentiation It is a process in which the cells derived from the apical meristem (root and shoot apex) and the cambium undergo structural changes in the cell wall and the protoplasm
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Introduction: Plant hormones and growth regulators are chemicals that affect flowering‚ aging‚ root growth‚ killing of leaves‚ promotion of stem elongation‚ color enhancement of fruit‚ prevention of leafing‚ and many other conditions. Very small concentrations of these substances produce major growth changes. All plants produce hormones naturally‚ and growth regulators can be applied by people to are applied to plants by people. Plant growth regulators may be synthetic compounds that mimic naturally
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