Short treatment times (usually 6 months to 2 years under optimal conditions).

The new systems allow optimal growing conditions for a greater variety of plants.

Only about one third were able to be infected under optimal conditions.

It should be designed to provide optimal conditions for the man rather than the machine.

Thus, these people are very well accepted, which allows them to live in optimal conditions.

And they have to do it under less than optimal conditions.

Short treatment times (usually less than 1 to 3 years under optimal conditions).

Under optimal conditions the L3 stage is reached within five days, but usually takes longer in the field.

Under optimal conditions, the rate of fire was one shot every 18 seconds, or three per minute.

Under optimal conditions there may be eight to 10 generations per season.