In horticultural applications, perlite is used throughout the world as a component of soilless growing mixes where it provides aeration and optimum moisture retention for superior plant growth.

This paper considers the classification compression principal component estimate of regression coefficient in growth curve model and proves that it is superior to least squares estimate.

In the competitive adsorption of a dual component system, the adsorption of dye is superior to phenol, meanwhile the adsorbed quantity of phenol is less than that for its single component system.