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Author Question: Which group of soybean seedlings do you think will grow faster? Why? What will be an ideal ... (Read 38 times)

genevieve1028

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Which group of soybean seedlings do you think will grow faster? Why?
 
  What will be an ideal response?

Question 2

Explain how the amount of available soil nitrogen is related to the differences
  in cultivation practices among the sites.


 
  What will be an ideal response?



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karmakat49

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Answer to Question 1

group of soybean seedlings treated with the bacterial inoculum should grow
faster. The increased growth rate is a result of increased nitrogen availability as the seed germinates and the seedling begins to grow. Though untreated seedlings can
develop root nodules containing Rhizobium, which occurs naturally in the soil,
treating the seedlings with pea inoculum guarantees that the seedlings will become
infected with Rhizobium as they germinate. The number of nodules per plant is also
increased by the use of commercial pea inoculum



Answer to Question 2

Because many leguminous plants used as crop plants are nitrogen-fixers, the
bacteria associated with the roots of these plants would be actively engaged in
fixing atmospheric nitrogen and adding it to the soil. Animal fecal material and
urine are also high in nitrogen; not unless the pasture contained a large number of
animals with an active soil microflora, most of the nitrogen would be in the green
dung and not in the soil.






 

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