All crops require some form of skilled or unskilled labour.
There is a difference between semi-skilled labor and unskilled labor. Semi-skilled labor requires some training. Unskilled labor does not require the same type of training.
unskilled, semi-skilled and skilled labor
A limiting factor limits the development or growth of a population, an organism or process. Examples include: shortage of skilled labor and materials, limited labor hours and machine hours.
The term skilled labor refers to work that can only be done by people who are highly trained.
skilled craftsmen
American federation of labor limited its membership to skilled craft union.
the three features of labour are: skilled semi-skilled unskilled
unskilled, semiskilled, skilled and professional. unskilled=those who work primarily with their hands because they lack the training and skills required for other tasks. semiskilled-workers with enough mechanical abilities and skills to operate machines that require a minimum amount of training. skilled-includes workers who are able to operate complex equipment and can perform their tasks with little supervision. professional-those individuals with the highest level of knowledge based education and managerial skills.
General labor includes many non-skilled tasks. An example of this is cleaning, sweeping, moving, and lifting. Most general labor jobs require very basic tools such as a broom, mop, or shovels.
unskilled labor
semi-skilled labor