A. To Evarts and Mason (106) it is due to gravity
B. Metzger (1908) says it is due to tension and compression
C. Wersking and Baily, due to (1942) increase or decrease in plant hormones
D. Philips says (1940), it is due to wind
E. All of the above
Forestry Mcqs
A. To Kochler (1933), due unbalanced growth stresses or forces
B. They may develop as a result of heavy frost
C. Both (a) & (b)
D. None of these
A. Heavy frost
B. Heavy low temperature
C. Both (a) & (b)
D. None of these
A. Frost rings: are dark brownish lines within the growth rings as a result of injury to the cambium due to the heavy frost
B. Frost cracks: to the very much low temperature, the cracks appear at the basal portion of old trees
C. Both (a) & (b)
D. None of these
A. Railway sleepers Cross arms
B. Carriage and wagon work
C. House building beams, floor boards
D. Door and windows frames
E. All of the above
A. Joinery wood
B. Construction
C. Light furniture
D. All of the above
A. Roofing, flooring, railway sleepers
B. Transmission poles, cheap joinery
C. Furniture making match
D. All of the above
A. Packing cases, railway sleepers
B. Planking for floors
C. Ceiling, cheap type of doors and windows
D. House construction, plywood, match manufacture
E. All of the above
A. Packing cases, railway sleepers,
B. Planking for floors and cheap type of doors and windows
C. Both (a) & (b)
D. None of these
A. Furniture and cabinet making
B. House building floorings and general joinery and carpentry work
C. Cart and carriage, agricultural implements
D. All of the above