Penn State Extension

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A Guide to Preserving Trees in Development Projects
A Guide to Preserving Trees in Development Projects - Articles Articles

A Guide to Preserving Trees in Development Projects

William Elmendorf, Ph.D., Henry Gerhold, Ph.D., Larry Kuhns

This publication explains tree health and environmental considerations and details how to preserve trees. More
Landscape Tree Factsheets
Landscape Tree Factsheets - Guides and Publications Guides and Publications

Landscape Tree Factsheets

Henry Gerhold, Ph.D.

456

$30.00
Select trees for planting in your towns and cities. More
Beekeeping Basics
Beekeeping Basics - Guides and Publications Guides and Publications

Beekeeping Basics

Maryann Frazier

98

Become a successful beekeeper by learning about honey bee biology and how to manage bee colonies. More
A Field Guide to Honey Bees and Their Maladies
A Field Guide to Honey Bees and Their Maladies - Guides and Publications Guides and Publications
Identify and treat maladies in your honey bee colony. More
Figure 1. Space requirements for resting and rising dairy cow
Designing and Building Dairy Cattle Freestalls - Articles Articles

Designing and Building Dairy Cattle Freestalls

Dan McFarland, Robert Graves, Ph.D., P.E.

Freestalls (cubicles) provide dairy cows a clean, dry, comfortable resting space. Well-designed and properly maintained freestalls are a key component in a freestall housing system. More
Natural Ventilation for Freestall Barns
Natural Ventilation for Freestall Barns - Articles Articles

Natural Ventilation for Freestall Barns

Robert Graves, Ph.D., P.E.

Cows continuously produce heat and moisture so a ventilation system is necessary to continuously exchange inside air for drier, cooler outside air. More
Natural Ventilation for Dairy Tie Stall Barns
Natural Ventilation for Dairy Tie Stall Barns - Articles Articles

Natural Ventilation for Dairy Tie Stall Barns

Robert Graves, Ph.D., P.E.

Tie stall barns require a ventilation system that allows close control of air exchange and temperature to prevent the barn from reaching freezing temperatures. More
Photo credit: Amber Yutzy
Recommendations for Calf and Heifer Housing Dimensions for Holsteins - Articles Articles

Recommendations for Calf and Heifer Housing Dimensions for Holsteins

John Tyson, Dan McFarland, Robert Graves, Ph.D., P.E.

Summary of design suggestions for planning calf and heifer housing systems for Holstein dairy cattle; a starting point for the design process. More
Recommendations for Calf and Heifer Housing Dimensions for Jerseys
Recommendations for Calf and Heifer Housing Dimensions for Jerseys - Articles Articles

Recommendations for Calf and Heifer Housing Dimensions for Jerseys

John Tyson, Dan McFarland, Robert Graves, Ph.D., P.E.

Summary of design suggestions for planning calf and heifer housing systems for Jersey cattle; a starting point for the design process. More
Beekeeping - Honey Bees
Beekeeping - Honey Bees - Articles Articles

Beekeeping - Honey Bees

Maryann Frazier, Tom Butzler, Lynn Kime, Timothy Kelsey, Ph.D., Jayson K. Harper, Ph.D.

Honey bees can be managed to produce many products, but they are even more valued for the major role they play in pollination of agricultural crops. More
Pruning Landscape Trees
Pruning Landscape Trees - Articles Articles

Pruning Landscape Trees

William Elmendorf, Ph.D., Henry Gerhold, Ph.D.

Proper pruning of landscape trees improves their structural strength, maintains their health, enhances their beauty, and increases their value. More
Nutrient Budgets for PA Cropland: What They Reveal and How Can They Be Used?
Nutrient Budgets for PA Cropland: What They Reveal and How Can They Be Used? - Articles Articles

Nutrient Budgets for PA Cropland: What They Reveal and How Can They Be Used?

Douglas Beegle, Ph.D., Robert Graves, Ph.D., P.E., Kristen Saacke Blunk

Nutrient budgets have been developed by Mid-Atlantic Regional Water Program to quantify the magnitude and sources of excess nutrients that are being generated and applied throughout Pennsylvania. More
Topping trees results in large areas of decay and fast-growing, weak, and unattractive watersprouts.
Don't Top Trees - Articles Articles

Don't Top Trees

William Elmendorf, Ph.D., Henry Gerhold, Ph.D.

This article explains the dangers of tree topping and what measures should be taken to prevent them. More