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Describes methods for predicting lithologies present in soils developed on glacial till, and the potential weathering contributions from rock particles >2 mm in diameter. The methods are not quantitative in terms of providing weathering rates, but provide information that can further the…
Author(s): Scott W. Bailey, James W. Hornbeck, James W. Hornbeck
Keywords: weathering rate, soil formation, nutrient cycling
Source: Res. Pap. NE-662. Radnor, PA: US. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 7 p.
Year: 1992
Dense layers of bacteria and fungi in the rhizoplane of three species of cactus (Pachycereus pringlei, Stenocereus thurberi, Opuntia cholla) and a wild fig tree (Ficus palmeri) growing in rocks devoid of soil were revealed by bright-field and fluorescence…
Author(s): M.E. Puente, Y. Bashan, C.Y. Li, V.K. Lebsky
Keywords: Bacillus, cactus, cardon, cholla, desert, Ficus, fig tree, fluorescent psuedomonads, lava degradation, nitrogen fixation, Opuntia, Pachycereus, phosphate solubilization, rock weathering, soil formation, Stenocereus
Source: Plant Biology. 6: 629-642
Year: 2004
Four bacterial species isolated from the rhizoplane of cacti growing in bare lava rocks were assessed for growth promotion of giant cardon cactus seedlings (Pachycereus pringlei). These bacteria fixed N2, dissolved P, weathered extrusive igneous rock, marble, and limestone, and…
Author(s): M.E. Puente, C.Y. Li, Y. Bashan
Keywords: Azospirillum, Bacillus, cactus, cardon, Citrobacter, desert, N2-fixation, Pachycereus, phosphate solubilization, Pseudomonas, rock degradation, rock weathering, soil formation
Source: Plant Biology. 6: 643-650
Year: 2004
Soils that resist wetting are a widespread phenomenon on chaparral areas of southern California watersheds. On burned watersheds, non-wettable soils markedly reduce moisture movement during both evaporation and infiltration. The reduced infiltration rate probably contributes significantly to the…
Author(s): Leonard F. DeBano, Joseph F. Osborn, Jay S. Krammes, John Letey
Keywords: soil formation, fire effects, soil erosion control, soil wettability, wetting agents, saturation resistance, infiltration rate, hydrophobic soil, line project, 1605
Source: U.S. Forest Serv. Res. Paper PSW-RP-43Berkeley, Calif., Pacific SW. Forest & Range Exp. Sta. 13 pp.
Year: 1967
Fire affects nutrient cycling and the physical, chemical, and biological properties of soils occupied by western montane forests. Combustion of litter and soil organic matter (OM) increases the availability of some nutrients, although others are volatilized (for example, N, P, S). Soil OM loss also…
Author(s): Leonard F. DeBano
Keywords: soil formation, soil properties, plant communities, ecosystems, fire influences, rhizosphere biology, silviculture, monitoring, nitrogen fixation, ectomycorrhiza, erosion, diseases, climate change
Source: In: Harvey, Alan E.; Neuenschwander, Leon F., compilers. Proceedings-management and productivity of western-montane forest soils; 1990 April 10-12; Boise, ID. Gen. Tech. Rep. INT-280. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. p. 151-156.
Year: 1991
Includes 35 papers and six poster synopses presenting state-of-the-art knowledge on the nature and problems of integrating soils information and expertise into management of inland western forest resources. Papers emphasize regional information, but include data from world literature and previously…
Author(s): Alan E. Harvey, Leon F. Neuenschwander
Keywords: soil formation, soil properties, plant communities, ecosystems, fire influences, rhizosphere biology, silviculture, monitoring, nitrogen fixation, ectomycorrhiza, erosion, diseases, climate change
Source: Gen. Tech. Rep. INT-280. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. 254 p.
Year: 1991
A plant-bacterium association between the giant cardon cactus Pachycereus pringlei and endophytic bacteria help seedlings establish and grow on barren rock, This cactus, together with other desert plants, is responsible for weathering ancient lava flows in the Baja California Peninsula of Mexico.…
Author(s): M. Esther Puente, Ching Y. Li, Yoav Bashan
Keywords: Bacillus, cactus, cardon, desert, rock degradation, nitrogen fixation, Pachyereus, phosphate solubilization, rock weathering, soil formation
Source: Environmental and Experimental Botany. 66: 402-408
Year: 2009
A plant-bacterium association of the cardon cactus (Pachycereus pringlei) and endophytic bacteria promotes establishment of seedlings and growth on igneous rocks without soil. These bacteria weather several rock types and minerals, unbind significant amounts of useful minerals for plants from the…
Author(s): M. Esther Puente, Ching Y. Li, Yoav Bashan
Keywords: Bacillus, cactus cardon, desert, rock degradation, nitrogen fixation, Pachycereus, phosphate solubilization, rock weathering, soil formation
Source: Environmental and Experimental Botany. 66: 389-401.
Year: 2009
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