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Card 6

Front

Describe another process carried out by microorganisms which adds ammonium ions to soil

Back

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Card 7

Front

explain how ploughing would affect the fertility of the soil

Back

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Card 8

Front

suggest two ways in which crop rotation may lead to high crop yields

Back

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Card 9

Front

suggest appropriate units for gross productivity

Back

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Card 10

Front

explain the decrease in gross productivity as the woodland matures

Back

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Card 11

Front

explain the increase in biomass during the first 20 years

Back

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Card 12

Front

little increase in biomass after 100 years

Back

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Card 13

Front

suggest one reason for conserving woodlands

Back

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Card 14

Front

explain what is meant by co dominant species

Back

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Card 15

Front

why do male cats with a tortoiseshell phenotype rarely occur

Back

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