Soil health indicators for Central Washington orchards

Soil health assessment can be a critical soil testing tool that includes biological and physical indicators of soil function related to crop and environmental health. Soil health indicator minimum data sets should be regional and management goal specific. The objective of this study was to initiate...

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Bibliographic Details
Published in:PloS one 2021-10, Vol.16 (10), p.e0258991
Main Authors: DuPont, Sara Tianna, Kalcsits, Lee, Kogan, Clark
Format: Article
Language:English
Subjects:
Agricultural production
Availability
Bayesian analysis
Biological activity
Biological properties
Biology and Life Sciences
Carbon
Chemical properties
Crop yield
Crops
Earth Sciences
Ecology and Environmental Sciences
Ecosystems
Environmental health
Food quality
Fruits
Indicators
Irrigation
Management
Mathematical models
Nematodes
Orchards
Organic matter
Pratylenchus
Productivity
Properties
Respiration
Sand
Soil chemistry
Soil erosion
Soil fertility
Soil properties
Soil testing
Soils
Water availability
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Summary:Soil health assessment can be a critical soil testing tool that includes biological and physical indicators of soil function related to crop and environmental health. Soil health indicator minimum data sets should be regional and management goal specific. The objective of this study was to initiate the steps to develop a soil assessment tool for irrigated orchard soils in Central Washington, United States including defining objectives, gathering baseline data and selecting target indicators. This study measured twenty-one biological, physical and chemical properties of soils in irrigated Central Washington apple orchards including indicators of water availability, root health, fertility, and biological activity. Soil factors were related to fruit yield and quality. Principal components and nonlinear Bayesian modeling were used to explore the relationship between soil health indicators and yield. Soil indicators measurements in Washington state orchards varied widely but generally had lower organic matter, available water capacity, wet aggregate stability and higher percent sand than in other regions. Linear mixed effects models for available water capacity and percent sand showed significant effects on yield, and models for root health ratings and Pratylenchus nematodes had moderate effects. The minimum dataset of soil health indicators for Central Washington orchards should include measurements of water availability (available water capacity, percent sand) and of root health (bean root health rating, Pratylenchus nematodes) in addition to standard fertility indicators to meet stakeholder management goals.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0258991