Average height of 10 trees planted on reclaimed, mined-over land
Growth factor added Nothing added 100 kg/ha N 50 kg/ha P 2 cm/wk water
no lime 56 45 63 50
lime added 85 170 58 62
Based on the data given in the Table, if the revegetation site were limed and fertilized with nitrogen, would you also recommend the addition of P fertilizer to improve tree growth?
A) yes B) no C) no basis to judge
Question 2Sulfuric acid is sometimes added to irrigation water to help in the reclamation of sodic soils.
Indicate whether the statement is true or false
Question 3Average height of 10 trees planted on reclaimed, mined-over land
Growth factor added Nothing added 100 kg/ha N 50 kg/ha P 2 cm/wk water
no lime 56 45 63 50
lime added 85 170 58 62
Consider the data in the accompanying table giving the average height of 10 trees planted in order to revegetate a disturbed soil. What was the first limiting factor for tree growth on this soil?
A) soil pH B) nitrogen C) phosphorus D) water
Question 4Buffer strips principally function in nutrient management to:
A) recycle non-renewable nutrients.
B) enrich the soil with nutrients that are needed for optimum plant growth.
C) slow the movement of potential pollutants to the groundwater.
D) prevent the transport of nutrients from fields to streams.
E) all of the above
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