Record the most frequent occurrence. Yucca green mite damage can obscure this trait, so it is better to score earlier rather than later. Note a leaf from the middle of the plant

Observe three months after planting

Leaf taken from a medium height position

Leaf taken from a medium height position

Observe from the middle third of the plant. Make a small shallow cut and peel off the epidermis

Observe from the middle third of the plant

Measure only main roots

Record the most frequent occurrence

Record the most frequent occurrence

The root must be touched

At least one flower on each plant. Scoring should be repeated at regular intervals until harvest to determine if flowering occurs. Record the presence of flowering and the date of observation

Record the most frequent occurrence

Evaluate on five leaves and take the predominant number of lobes

Observe from the middle third of the plant. Measure two leaves/plant. Express in cm

The observation should be made in the upper 20 cm of the plant

Measure before harvest. Measure the vertical height from the ground to the top of the canopy. Express in cm

Measure the vertical height from the ground to the first primary branch. Zero = no branching. Ignore lateral branching. Express in cm. Record measurements for at least three plants

Record the number of branch divisions. Zero (0) for no branching. Ignore if branching laterally

Measure on a mature root. This can be affected by nematodes and/or cassava brown streak virus diseases

Root shape

Consider a 20-centimeter commercial stake

Expressed in kilograms

Expressed in kg/ha