By Trisha Gedon STILLWATER, Okla. – Anyone interested in learning about rain barrels in the home landscape can do so at an upcoming Fundamentals for Rain Barrels presentation in April. “Rainwater harvesting is a cost-effective and environmentally friendly practice for consumers,” said Qing Luo, Oklahoma State University associate professor and OSU Extension landscape architecture specialist. “It’s a great way to conserve water, which can cut down on your utility bill. It also can help reduce the demand…