What is the primary function of a Dosatron Proportioner in greenhouse operations?

The primary function of a Dosatron Proportioner in greenhouse operations is to apply fertilizer to greenhouse crops. This device works by providing an automated method for mixing liquid fertilizers into an irrigation system, ensuring that plants receive the nutrients they need at the correct concentrations. It operates on the principle of proportional injection, allowing for precise application which can enhance plant health and growth. By integrating with existing irrigation systems, the Dosatron helps maintain consistent feeding schedules and reduces labor costs associated with manual fertilization techniques.

The other options address important aspects of greenhouse management but do not encompass the main purpose of a Dosatron. Monitoring soil moisture levels relates to ensuring plants are receiving adequate irrigation, applying pesticide treatments focuses on pest control, and testing water quality ensures that the water used is free of contaminants. However, these functions are separate tasks that do not align with the primary role of a Dosatron Proportioner, which is specifically designed for the efficient application of fertilizers.