Electrical Conductivity and How to Use Your Salt Meter

Electrical conductivity or 'salts' in soils and media are addressed by the author in terms of what a salt meter does, what electrical conductivity means, and how the information can help the grower. Several methods used to do electrical conductivity readings are included.

Root Death in the Landscape

Nursery Crops
A discussion about the importance of plant root health in the landscape environment and the factors that can influence root system health. The authors address a variety of topics that influence root health ranging from nursery production methods to landscape practices.

Rate of Nitrogen Application During the Growing Season and Spraying Plants with Urea in the Autumn Alters Uptake of Other Nutrients by Deciduous and Evergreen Container-grown Rhododendron Cultivars

Nursery Crops
Research was conducted on one-year-old container grown Rhododendron L. (Rhododen- dron ‘H-1 P.J.M’) and azalea (Rhododendron ‘Cannon’s Double’) to determine the influence of fall sprays of urea on the uptake of nutrients other than nitrogen (N).

Nitrogen Availability Alters Mineral Nutrient Uptake and Demand in Container-grown Deciduous and Evergreen Rhododendron

Nursery Crops
Rhododendron (Rhododendron ‘H-1 P.J.M.’) and azalea (Rhododendron ‘Cannon’s Double’) were grown with (+N) or without (N-deficient) nitrogen (N) from May to September to determine the effects of N-availability on uptake, demand, and allocation of other mineral nutrients.

Rate of Nitrogen Fertigation During Vegetative Growth and Spray Applications of Urea in the Fall Alters Growth and Flowering of Florists’ Hydrangeas

Nursery Crops
A study was conducted involving Hydrangea macrophylla ‘Merritt’s Supreme’ to determine whether nitrogen (N) fertigation rates applied during vegetative growth and spray applications of urea in the fall influences plant growth and flowering during forcing.

Cold Tolerance of Container-grown Green Ash Trees Is Influenced by Nitrogen Fertilizer Type and Rate

Nursery Crops
Container-grown ‘Summit’ green ash (Fraxinus pennsylvanica) trees were used in a recent study in an effort to determine whether cold tolerance of the tree's buds and stems are related to nitrogen (N) application rate and fertilizer form.

Bud Necrosis of Green Ash Nursery Trees Is Influenced by Nitrogen Availability and Fertilizer Type

Nursery Crops
Nursery-grown green ash (Fraxinus pennsylvanica ‘Summit’) trees were tested to determine the relationship between the nitrogen (N) status of the trees in the fall and bud necrosis during the following spring. The results of the study and it's implications are discussed by the authors.

Spraying Leaves of Pear Nursery Trees with Urea and Copper Ethylenediaminetetraacetic Acid Alters Tree Nitrogen Concentration without Influencing Tree Susceptibility to Phytophthora syringae

Nursery Crops
An investigation was conducted into the increased susceptibility of pear nursery trees to infection by Phytophthora syringae following fall foliar sprays of urea which increased nitrogen (N) content in the trees. The authors discuss the methods and materials involved in the experiments along with the results.

Tree Growth Stage and Environment After Pathogen Inoculation Alters Susceptibility of Pear Trees to Phytophthora Canker

Nursery Crops
The results of an investigation on pear (Pyrus communis L. OHF97) to determine whether specific factors influence the tree's susceptibility to Phytophthora syringae Klebahn. The factors included tree growth stage, nitrogen (N) status, wound age, and infection environment.

Beyond Skogholm Cotoneaster: Performance of Hydrangea, Azalea, Juniper and Spirea in a Clay Amended Substrate

Nursery Crops
Research was conduced on the effect of using a clay-amended substrate to improve nutrient and water efficiency for plants in containers. The presentation includes detailed results on the performance of the different plants used.