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United States Department of Agriculture (USDA) 2006

SUSTAINABLE CROP AND SOIL MANAGEMENT SYSTEMS FOR DRYLAND PACIFIC NORTHWEST AGRICULTURE

Crop Soil Dryland

United States Department of Agriculture (USDA) Research, Education & Economics Information System (REEIS)

Titre : SUSTAINABLE CROP AND SOIL MANAGEMENT SYSTEMS FOR DRYLAND PACIFIC NORTHWEST AGRICULTURE

Identification : 5356-12000-008-00D

Pays : Etats Unis

Durée : Apr 29, 2006 à Sep 30, 2006

Domaine : Leguminous vegetables, general/other ; Soft white wheat ; Water resources ; Soil

Partenaire : AGRICULTURAL RESEARCH SERVICE PENDLETON

Objectif
Identify pathways of water infiltration into soil and factors producing high infiltration rates. Produce guidelines for high infiltration capacity. Evaluate functional and taxonomic diversity of soil microorganisms. Delineate soil organic matter components and their relationship to soil quality. Develop a soil carbon model capable of using readily available data to predict the storage or loss of soil carbon in relation to management practice.

Descriptif
Changes in soil fauna, carbon accumulation, porosity characteristics, compaction, aggregation, and microbial activity will be investigated for their role in water infiltration into tilled and untilled cropping systems. Dye tracing and other techniques will be developed to identify actual infiltration routes. Climax communities of soil microorganisms in long-term agroecosystems will be identified using physiological and biochemical methods. The population dynamics of selected taxa will be determined and the activity of important microbial groups will be measured. Carbon and nitrogen transformations in selected management systems will be evaluated by standard analytical methods. Soil organic matter pools will be investigated and their relationship to soil quality evaluated. A mathematical model, in Windows format, for carbon sequestration in agricultural soils will be developed. The model will be based on observations from local long-term experiments and will be validated using long-term data from sites across the USA

Présentation : USDA

Page publiée le 11 décembre 2015, mise à jour le 3 novembre 2017