Centre County — Research — Penn State College of Agricultural Sciences

Skip to main content

Students
Undergraduate Students

Graduate Students

All Information for Students
Industry
Penn State Ag Council

Ag Action Network

Recruitment and Employer Relations

Continuing Education

Labs and Services

All Information for Industry
Alumni
Get Involved

Awards and Recognition

Armsby Honor Society

All Information for Alumni
Faculty & Staff
Faculty & Staff Resources

All Information for Faculty & Staff
Visitors & Public
Places to Visit

Service Laboratories

Programs and Events

Youth Opportunities

All Information for Visitors & Public

Apple Carbohydrate Thinning Model for Rock Springs, PA

Last data for the 2021 season.

Rock Springs, PA

Rock Springs 06 01.jpg

Contact Information

Robert Crassweller, Ph.D.

Robert Crassweller, Ph.D.

Professor of Horticulture

Email rmc7@psu.edu
Office 814-863-6163

Penn State Extension Tree Fruit Education

Social Media

Production Guides

Fruit Production for the Home Gardener

Grow your own fruit on a small scale.

Tree Fruit Production Guide

Get the most up-to-date information on growing tree fruit on a commercial scale.

Social Media

Production Guides

Fruit Production for the Home Gardener

Grow your own fruit on a small scale.

Tree Fruit Production Guide

Get the most up-to-date information on growing tree fruit on a commercial scale.