Influence of Ectomycorrhizal Fungal Inoculation on Growth and Root IAA Concentrations of Transplanted Conifers

Nursery Crops
USDA-ARS affiliated researchers tested the hypothesis that: (1) IAA concentration of mycorrhizal conifer roots is influenced by the in vitro (IAA and ethylene) production capacity of their associated ectomycorrhizal fungi; and (2) increased concentrations of root IAA cause an increase in root growth resulting in improved seedling growth and survival.

Root Culturing in Bareroot Nurseries

Nursery Crops
Information provided on the bareroot nursery practice of root culturing. Root culturing is defined by the author as a general term for nursery cultural practices designed to modify root growth or morphology while the seedling is still in the nursery bed.

Effects of Spring Soil Nitrogen Application on Nitrogen Remobilization, Uptake, and Partitioning for New Growth in Almond Nursery Plants

A study was conducted on almond trees to (1) determine whether soil N application alters N remobilization; (2) quantify the effects of soil N availability in the spring on N uptake, distribution, and new growth; and (3) determine the most efficient time for spring soil N applications.

Soil and Foliar Nitrogen Supply Affects the Composition of Nitrogen and Carbohydrates in Young Almond Trees

The objectives of this study were to determine the chemical composition of nitrogen (N) and non-structural carbohydrates in response to different N supplies and the interaction between storage N and non-structural carbohydrates in young almond trees.

Capillary Beds

Nursery Crops
A discussion about capillary beds and also a how to guide on the construction of the beds for nursery production. Topics addressed include the construction of capillary beds, costs (labor, equipment, materials), root growth and development, leaf scorch, and pathogens.

Nitrogen Mobilization, Nitrogen Uptake and Growth of Cuttings Obtained from Poplar Stock Plants Grown in Different N Regimes and Sprayed with Urea in Autumn

Nursery Crops
Research was conducted on poplar (Populus trichocarpa ×P. deltoides) cuttings to determine whether different weekly nitrogen fertigation regimes altered nitrogen mobilization, nitrogen uptake, and growth of cuttings.

Changes in Cutting Composition During Early Stages of Adventitious Rooting of Miniature Rose Altered by Inoculation with Arbuscular Mycorrhizal Fungi

Plant propagation
USDA affiliated study conducted on miniature roses (Rosa L.) to determine if components of arbuscular mycorrhizal fungi inoculum induced changes in adventitious rooting of miniature roses and the time frame in which the rooting changes occurred.

Susceptibility of Pacific Northwest Conifers to Phytophthora Root Rot

Plant Disease
A study was conducted on Phytophthora root rot and the susceptibility of Pacific Northwest conifers. Twelve species of conifer were tested for susceptibility to five species of Phytophthora. Report includes methods, results, conclusions, and recommendations.

Practices to Minimize Contamination of Groundwater and Runoff Water in Greenhouse and Nursery Production of Container Grown Plants

A guide to help minimize the amount of leaching created by greenhouse and nursery container production water runoff. Topics include nitrogen leaching, overhead irrigation with recirculation of runoff, and computer-controlled pulsed-trickle fertigation.

Enhanced Rooting of Kinnikinnick Cuttings using Mycorrhizal Fungi in Rooting Substrate

Plant propagation
Hardwood cuttings of kinnikinnick 'Massachusetts' (Arctostaphylos uva-ursi) were inoculated with mycorrhizal fungi to determine if the addition of the fungi during cutting propagation increased rooting or root growth, or altered the time for rooting.