4 - Physical Factors Affecting Crops - Water

4 - Physical Factors Affecting Crops - Water - Physical...

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Physical Factors Affecting Crops - Water
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Water Key physical factor Universal solvent for living systems • More limiting than CO 2
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Water as a physical factor follows similar pattern as most physical factors Water
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Water – Optimum range often wider and flatter than for most physical factors Important in irrigation to avoid excess and waste
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Too much water? Raised beds avoid excessive water levels
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Pigeonpea – crop adapted to low water requirements
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Familiar graph for most physical factors
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Ecological Niche Similar graphs could be drawn for most factors (food, water, light, space, temperature, etc.), defining limits and optimum ranges for each factor. Ecological niche for a species is defined by the combination of its requirements for every physical and biological resource (n dimensions).
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Ecological Niche Principles 1. The niche requirement that is most limiting will determine growth rate or even presence of the organism. = “ Law of the minimum
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This note was uploaded on 03/01/2010 for the course PCB 4683 taught by Professor Williams,j during the Spring '08 term at University of Central Florida.

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4 - Physical Factors Affecting Crops - Water - Physical...

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