Soil structure is often modified by adding organic matter, a good soil conditioner, gypsum, sulphur, and through the use of proper cultural procedures. The air holding capacity of the soil is increased and adequate drainage is assured. Overwatering and underwatenng losses are reduced due to the surface structure of the particle which retains 3 to 4 times its weight in water without penetrating the particle. Excess water will drain off. Cracking and crusting of soil surface is reduced or prevented.
Soil compaction is prevented.
A more even distribution of the root system throughout the entire growing media is made possible. Production costs are reduced in that the material is easy to handle, does not require sterilization and mixes may be accurately dupli-cated because of consistent perlite quality. Shipping weights and transportation costs are reduced. Uniform growing and propagating media are insured regardless of season or location. Dolomite 4 oz.