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 most limiting factor for tree growth on this soil?
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 84 80
A) water B) nitrogen C) soil pH D) phosphorus
C
You might also like to view...
Because the surface weld symbol does not refer to a joint, it has no arrow side or other side significance.
Answer the following statement true (T) or false (F)
Technician A says fuel injectors may be cleaned by soaking them in solvent. Technician B says it is a good idea to use a wire brush to unclog injectors. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A nor B
Technician A says that a harmonic balancer repair sleeve kit will repair a worn damper hub at minimal cost. Technician B says this type sleeve is pressed onto the hub using a small amount of silicone sealer. Who is correct?
A. Technician A B. Technician B C. Both technicians D. Neither technician
Technician A says that all current diesel CR fuel systems use a transfer pump. Technician B says that Caterpillar flange mount their transfer pump to the CR high pressure pump. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B