AOAC SPADA Meeting
Soil Texture
Soil Texture: • Critical to understanding soil behavior • Varies little with time • Impacts water retention • Impacts gas exchange • Impacts nutrient retention • active fraction of soil (clay) • Silt includes bedrock material and minerals • Sand lest active and less surface area
h ttp://www.soils4teachers.org/files/s4t/texture.pdf
Habitat for Soil Organisms
• Primary Producers • Plants • Moss • Algae • Lichens • Primary Consumers • Herbivores
• Photosynthetic Micobes
• Detritivores (dead leaves) • Saprophytic (dead tissue)
• Secondary Consumers
• Consume Primary Consumers
• Tertiary Consumers • Predators • Microbial feeders • Ecosystem Engineers • Earthworms • Burrowing animals
• Certain beetles – dung beetle
https://www.nrcs.usda.gov/Internet/FSE_MEDIA/nrcs142p2_049822.jpg
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