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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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Hjratliff Hjratliff
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6 years ago
To be classified as a conservation tillage practice, a system must leave at least what portion of the soil surface covered with plant residues?
 
  A) 20 B) 10 C) 30 D) 50 E) 40

Question 2

The growth of plants on sodic soils is constrained by all but one of the following:
 
  A) caustic influence of high pH caused by sodium carbonate and bicarbonate.
  B) toxicity of very high levels of calcium carbonate.
  C) low micronutrient availability due to high pH.
  D) toxicity of bicarbonate and other anions.
  E) oxygen deficiency due to breakdown of soil structure.

Question 3

If you want to maximize the quantity of vegetative cover on soil which of the following tillage practices would you use?
 
  A) conventional moldboard plow
  B) no-tillage
  C) strip till
  D) stubble mulch
  E) ridge tillage

Question 4

The P factor in the Universal soil-loss equation is concerned with all but one of the following:
 
  A) contour tillage.
  B) terraces.
  C) strip-cropping.
  D) vegetative covers.
  E) soil erodibility.
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StudentWarriorStudentWarrior
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6 years ago
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Hjratliff Author
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6 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
54321abs
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Yesterday
Thanks for your help!!
gmiannotti
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2 hours ago
Smart ... Thanks!
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