CHT Plant Propagation & Nursery Management

Question 1

Which type of cutting is taken from the current season's new growth before it hardens?

Accepted Answer

Softwood cutting

Answer

Softwood cuttings are taken from succulent, actively growing new shoot tips in spring or early summer before the wood hardens.

Question 2

Stratification is a seed treatment used primarily to:

Accepted Answer

Break dormancy of seeds requiring a cold, moist period

Answer

Stratification mimics winter conditions by exposing seeds to cold, moist conditions to break physiological dormancy before germination.

Question 3

Grafting is preferred over seed propagation for fruit trees because it:

Accepted Answer

Guarantees the exact genetic characteristics of the parent

Answer

Grafting is a form of clonal propagation that ensures the scion produces fruit with identical genetic characteristics to the selected parent variety.

Question 4

What is the function of rooting hormone (IBA) when used on cuttings?

Accepted Answer

Stimulate callus and root formation at the cut surface

Answer

Indole-3-butyric acid (IBA) is an auxin that promotes adventitious root initiation and development at the base of vegetative cuttings.

Question 5

Division as a propagation method is best suited for:

Accepted Answer

Clump-forming perennials and ornamental grasses

Answer

Division involves separating the crown and root system of clump-forming perennials and grasses into sections, each with roots attached for immediate replanting.

CHT - Certified Horticultural Technician Practice Test

CHT - Certified Horticultural Technician Practice Test

CHT Plant Propagation & Nursery Management