When using the high power objective only the knob should be used

from my experience I think the answer is true

compost can be added to topsoil as a:

pesticide

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.