Professional Grade Fertigation Sports Turf Valve Box VB - WD 700 from Turf Feeding Systems, Inc

This Water Driven system brings fertigation to sports turf, parks, and
landscaped areas without elecrtical power. This fertigation system
uses a water driven pump to fertigate proportionally. It offers
proportional control by flow to adjust the injection rate for each zone.
Accurate injection rates offer dependable micro feeding of the sports
field with each irrigation cycle. Rates from 1 gal per hour up to 12 gal
per hour offer coverage from 2 acres to over 30 acres.
The advantages of Fertigation have been proven. It will reduce fertilizer
cost, labor, save water, and give you a quality landscape.