Submitted by dylan on Mon, 2008-10-27 06:15.
Variation in Db as a function of cover type and major horizon designation.
Submitted by dylan on Mon, 2008-10-27 05:53.
Sample sites for islands of fertility project. Pits were described and sampled by the Soils and Biogeochemistry Graduate Group, Feb. 2005.
Submitted by dylan on Mon, 2008-10-27 05:46.
Simple comparison of total carbon and nitrogen (kg/sq. m) from two pits under oak canopy vs. under buckwheat bushes.
Submitted by dylan on Mon, 2008-10-27 02:13.
Submitted by dylan on Thu, 2007-09-27 17:36.
Soil color generally varies in a predictable pattern with depth according to surface vegetation, clay mineralogy and parent material. Highly contrasting parent geology influences soil color within Pinnacles via four main processes:
- Original color of parent material
sedimentary sources: grey, yellow, white
granitic sources: yellow to orange
volcanic sources: pink, orange, white, green
- Landscape age
older landscapes generally have redder hues (Fe-expression) from longer chemical weathering
- Particle size distribution of parent material and the resulting field capacity of a soil formed from it
coarse textures result in lower field capacities, limiting vegetation growth and subsequent accumulation of organic matter in the surface horizons
- Weathering rate of parent material
sedimentary materials derived from granitic sources (grey to yellow hues) have high levels of quartz and are therefore less susceptible to chemical weathering than volcanic rocks (redder hues)
Submitted by dylan on Mon, 2007-01-29 23:00.
Note that this is a bit out of date, since several errors have been corrected. (update pending)
Submitted by dylan on Sat, 2007-01-27 03:00.
PINN Pano 1: Recent burn area.
Submitted by dylan on Sat, 2007-01-27 02:03.
Two illustrations describing the progress over time for two tasks: the collection of pedon data in the field, and the input of this data into PedLogic. Number of pedons associated with individual workers are summarized by day. Note that data was usually collected in teams. Click on figures for larger version.
Submitted by dylan on Wed, 2007-01-17 23:28.
Google Earth provides a flexible and open ended vizualization system for geographic data. We intend to present PINN soils data thorugh our own, 2 dimensional, interface (to avoid dependence on a quasi-free setup like GE). However, there are considerable extra features that can be added onto our presentation of the data through GE. For example, synthesized pedon data, photographs, and even geologic diagrams can be presented to the user in a 3D environment with little work on our end: we have the data, GE does the hard work of presenting it in 3D. Some early examples of what this might be like, along with links to the actual data, are presented below. Download GE and our data to give it a try for yourself.
Submitted by dylan on Wed, 2006-11-01 16:14.
Misc. scanned images from work at the Pinnacles National Monument, in collaboration with the NRCS and NPS.