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

Fertilizer
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

Fertilizer
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.

N Uptake, Soil Retention and Loss of Soil-Applied 15NH4 15NO3 in Young Fuji/M.26 Apple Trees with Different N Status

Nursery Crops
The purpose of research conducted on young apple (Malus domestica Borkh) trees was to determine the fate of soil applied nitrogen to young apple trees and the influence of tree nitrogen status on nitrogen uptake by young apple 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.

Groundwater: A Precious Resource

Irrigation
The Oregon Department of Environmental Quality offers information about the importance of ground water and susceptibility to pollution. Topics discussed include groundwater sources, groundwater purity, harmful pollutants, and protecting groundwater.

New Pesticide Rules to Protect Ground Water Adopted by Washington State Department of Agriculture

Management
An overview of the pesticide rules adopted by the Washington State Department of Agriculture in 1989. The new rules restricted pesticides containing one of more of the 18 active ingredients identified as having potential to contaminate ground water.

1988 Amendments to FIFRA - What do They Mean?

Management
An explanation of the 1988 amendments to the Federal Insecticide Fungicide and Rodenticide Act (FIFRA). The authors address what the amendments meant for growers, types of crops most affected, and concerns about pesticide re-registration.

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.

Application of Ectomycorrhizal Fungi in Vegetative Propagation of Conifers

Plant Propagation
A report on the potential use of ectomycorrhizal fungi in vegetative conifer production to increase adventitious shoots and enhance root formation and/or subsequent root branching. The authors specifically discuss in vivo cutting production, in vitro organogenesis and somatic embryogenesis.

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.

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