The density of soil surface soil is usually lower than the bottom soil.
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Soil radiation is the only source of soil heat.
Which of the following is not the names of soil structures?
A. blocky structure
B. porous structure
C. granular structure
D. columnar structure
When the soil pH is 8.0, the availability of ( ) is the lowest.
A. nitrogen
B. sulphur
C. molybdenum
D. phosphorus
In the profile of natural soil, the C horizon usually refers to ( ).
A. litter layer
B. compaction layer
C. parent material layer
D. deposition layer
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