Soil Classification

Soil Classification

SOIL CLASSIFICATION What is purpose of classification? Chaos was the rule of nature; order was the dream of man. Henry Adams How would you go about classifying soil?

Ethnopedology Study of folk soil knowledge folk, traditional, indigenous, local

Soil knowledge held by people who have occupied land for a long time Many ways of knowing

Western science looked down on local soil knowledge as unscientific. Folk soil knowledge uses spatial and time scales much more relevant to sustainable agriculture.

Local soil knowledge Time-tested Strategies that have been tried over centuries (or millennia) compared to < 100 yrs of industrial agriculture

Provides insights about human responses to change (climate change, soil erosion) Many properties used (taste!, texture, color, etc) but all are about function of soil in land use (need for water, nutrients, aeration, support)

Does not imply that indigenous groups have not substantially altered land or caused environmental degradation problems; can learn from mistakes, too 2000 BC to 1500 AD Maya occupation of Yucatan

peninsula 1200 BC to AD 1300 How did the Maya manage to feed millions of people for thousands of years in an area that is today sparsely populated and agriculturally poor?

Maya Lowlands Highlands Climates of Maya Lowlands: BS semi-arid steppe

Aw tropical savanna Am tropical wetdry Af tropical rainforest Agricultural adaptive regions in

the Maya lowlands Lari, Peru 1500 yrs agriculture Terraces

Compared to uncultivated: thicker A, lower bulk density, higher organic carbon, higher N and P; Impressive management suggests a substantial body of soil knowledge FAO/UNESCO International

global map Has system, adopted for purposes of creating a been replaced by World Reference Base

Uses some classes from other systems USDA Soil Taxonomy system Seventh Approximation Originally

10 Great Orders Have added two more (Andisols, Gelisols) Many include another order Anthrosols Hierarchical



SUBORDER Hierarchical categories Order Alfisol Suborder

Udalfs Great Hapludalfs group Subgroup

Typic Family Fine,loamy,mixed,superactive,frigi Series

hapludalfs d Nebish Fine-loamy, mixed, superactive, frigid Typic Hapludalfs mean annual

temp <8C; >6C range Nebish series Humid climate Fine-loamy, mixed, superactive, frigid Typic Hapludalfs particle size

high CEC Alfisol minimum horizon mixture of clay minerals

typical Naytahwaush series Fine, smectitic, frigid Oxyaquic Hapludalfs Fine-textured, smectite clays, <8 C, water-saturated, minimum horizons, humid climate Alfisols Fargo series

Fine, smectitic, frigid Typic Epiaquerts

Recently Viewed Presentations

  • Works Cited -

    Works Cited -

    Pompeii What were Pompeii's main attractions (before its untimely end)? The Forum Center of all activity Downtown, central location Includes temples, baths, and basilica Forum Baths Center for public bathing Common area for socialization Segregated baths Weight room, ball games,...
  • Chapter 1 basic concepts - AP Human Geography

    Chapter 1 basic concepts - AP Human Geography

    Formal region: defined by a commonality, typically a cultural linkage or a physical characteristic. e.g. German speaking region of Europe. Functional region: defined by a set of social, political, or economic activities or the interactions that occur within it. e.g....
  • PowerPoint 演示文稿 -

    PowerPoint 演示文稿 -

    Expressive and Flexible Access to Web-Extracted Data: A Keyword-based Structured Query Language Jeffrey Pound . Ihab F. Ilyas . Grant Weddell
  • Simple Machines - Henry County School District

    Simple Machines - Henry County School District

    Simple Machines Lever, Wheel & Axle, and Pulley ... The tip of the opener is under the lid of the can. When you push down, you exert an input force on the handle, and the opener pivots on the fulcrum....
  • Ghost Beliefs and Perceptions Survey

    Ghost Beliefs and Perceptions Survey

    Means of Surveying. SurveyMonkey. Links sent to… Alpha Delta Pi Facebook page. Various GroupMe groups
  • School of Engineering, Technologyand Computer Science

    School of Engineering, Technologyand Computer Science

    Increased collaboration with regional community for research "Stable" group of 11 full-time faculty able to concentrate on teaching, research, and service Increased outreach to community for recruiting of new students, perhaps as early as middle school Minor in Informatics for...
  • Skull X-ray in trauma To do or not

    Skull X-ray in trauma To do or not

    CT scan vs need for admission in hospital for neuro-observations, care from nursing staff including regular neuro-observations, food/catering, bed, lined, bed occupancy in overfull hospitals ect.
  • Language learning in Scotlands schools Louise Glen, Senior

    Language learning in Scotlands schools Louise Glen, Senior

    Accent . mimicry . at its peak. This is an internal page in . blue. and can be duplicated to create additional pages. Always keep the heading and footer as shown. Use the corresponding. blue. internal and back pages if...