A. Trees are raised with the preliminary object of helping a less hardy species
B. They are usually removed at an early stage as soon as they have served this purpose
C. Both (a) & (b)
D. None of these
Related Mcqs:
- Opening of canopy by scattered gaps, young crop more or less even-aged in which system:
A. Uniform system
B. Group system
C. Irregular system
D. Strip system - Opening of canopy irregular and gradual, young crop somewhat uneven-aged:
A. Uniform system
B. Group system
C. Irregular system
D. Strip system - Form of forest produced by introducing a young crop beneath an existing immature is called:
A. High forest with standards
B. Two-storied high forest
C. Wedge system
D. None of these - ________ is merely a modification of the uniform system where large quantities of advance growth of various ages and size even up to trees of 40 cm diameter are retained as part of the future crop:
A. Irregular Shelterwood system
B. Coppice system
C. Both (a) & (b)
D. None of these - _________ consists of a crop arranged in two different stories, one above the other; each story being approximately even-aged not of seedling as opposed to coppice origin:
A. Two-storied high forest
B. Three-storied high forest
C. Four-storied high forest
D. Five -storied high forest - Norman Borlaug, the American agricultural scientist and plant pathologist developed the high yield strains that greatly increased crop yields. He laid the groundwork for the green revolution and was awarded the Nobel Prize for Peace in ________
A. 1970
B. 1972
C. 1974
D. 1976 - What are the contents of yield tables in term of main crop:
A. Average diameter
B. Average height
C. Total basal area
D. Number of trees
E. All of the above - Which of the following is generally used for induced mutagenesis in crop plants?
A. Gamma rays (from cobalt 60)
B. X-rays
C. UV (260 nm)
D. Alpha particles - To prevent wind and water erosion, the crop is sometimes harvested in such a way that a basal stub of the plant is left behind. This phenomenon is called:
A. Ley farming
B. Mulching
C. Basin listing
D. Strip cropping - Measurement of increment of crop is:
A. From yield table
B. Estimation of movement rations from average diameter growth by diameter class
C. Increment determination by control method
D. Increment by continuous forest inventory (CFI)
E. All of the above
The correct answer to the question: "Nurse crop is:" is "Both (a) & (b) ".
