Soil production function refers to the rate of bedrock weathering into soil as a function of soil thickness. A general model suggested that the rate of physical weathering of bedrock (de/dt) can be represented as an exponential decline with soil thickness: where h is soil thickness [m], P0 [mm/year] is the potential (or maximum) weathering rate of bedrock and k [m−1] is an empirical constant. The reduction of weathering rate with thickening of soil is related to the exponential decrease of temperature amplitude with increasing depth below the soil surface, and also the exponential decrease in average water penetration (for freely-drained soils). Parameters P0 and k are related to the climate and type of parent materials. found the value of P0 ranges from 0.08 to 2.0 mm/yr for sites in Northern California, and 0.05–0.14 mm/yr for sites in Southeastern Australia. Meanwhile values of k do not vary significantly, ranging from 2 to 4 m−1. A number of landscape evolution models have adopted the so-called humped model. This model dates back to G.K. Gilbert's Report on the Geology of the Henry Mountains (1877). Gilbert reasoned that the weathering of bedrock was fastest under an intermediate thickness of soil and slower under exposed bedrock or under thick mantled soil. This is because chemical weathering requires the presence of water. Under thin soil or exposed bedrock water tends to run off, reducing the chance of the decomposition of bedrock. (Wikipedia).
Soil – Water - Plant Relationships
From playlist TEMP 1
To learn more about restoration action - and get involved - visit RESTOR from the Crowther Lab at https://restor.eco. Soil doesn't seem like it's "alive", yet it functions like a living thing in lots of key ways. LEARN MORE ************** To learn more about this topic, start your googlin
From playlist Biology
Soil - Water - Plant Relationships (Contd.)
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Plant Nutrition | Plants | Biology | FuseSchool
Plant Nutrition | Plants | Biology | FuseSchool Where do plants get their food from? Remember they are autotrophic, plants make their own food through the process of photosynthesis. In order to make all of the macromolecules, the plant needs to obtain some other elements from the soil. Fo
From playlist BIOLOGY: Plants
Robot farmers reshaping the agriculture sector
When it comes to farming technology, the future has arrived, with agriculture robots popping up all over farmers' fields. Indeed, robotic farming has improved to the point where it is already commonplace. Weed-killing robots can eliminate more than 100,000 weeds every hour. There are mech
From playlist Radical Innovations
What Types of Chemical Industries Are There | Environmental Chemistry | Chemistry | FuseSchool
Learn the basics about different types of chemical industries, from agriculture to pharmaceutical to energy, and many other uses. In this video, we consider the environmental impact caused by a range of different types of chemical industries. Chemicals produced by the chemicals industry
From playlist CHEMISTRY: Environmental Chemistry
Soil - Water- Plant Relationships (Continued)
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Crop. Water Requirements (Continued)
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Biodiversity, Ecosystems, & Ecosystem Services: TEEB@YALE
Linking Biodiversity, Ecosystem Functions, Ecosystem Services; Trade-offs among services ; Ecosystem Resilience & Thresholds ; Ecosystem Services, Human Well-Being, & Economic Valuation
From playlist TEEB @ Yale
Does Biochar Deliver Carbon-Negative Energy?
(May 19, 2010) Johannes Lehmann, Associate Professor of soil biogeochemistry at Cornell University, discusses the characteristics of naturally occurring terra preta including its agricultural and carbon sequestering benefits and then turns to considering the factors involved with implement
From playlist Lecture Collection | Energy Seminar
Janet Jansson: "The Soil Microbiome – From Metagenomics to Metaphenomics"
Emerging Opportunities for Mathematics in the Microbiome 2020 "The Soil Microbiome – From Metagenomics to Metaphenomics" Janet Jansson, Pacific Northwest National Laboratory Abstract: Soil microbial communities are among the most complex and diverse on the planet. This has led to difficu
From playlist Emerging Opportunities for Mathematics in the Microbiome 2020
From the Soil to the Clinic - D. Newman - 5/12/21
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From playlist Caltech Watson Lecture Series
Soil scientist Lucy Ngatia dishes the dirt on carbon.
Got 2 minutes? Lucy Ngatia explains her research on the different kind of carbon molecules found in the soil. carbon, sequestration, eutrophication, FAMU, biochemistry, climate change, global warming
From playlist Take 2 for Science
Cost-Benefit Analysis for Ecosystem Restoration Projects: TEEB@YALE
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From playlist TEEB @ Yale
Evolution of new metabolic functions in bacteria - Lecture 1 by Subramony Mahadevan
ORGANIZERS : Vidyanand Nanjundiah and Olivier Rivoire DATE & TIME : 16 April 2018 to 26 April 2018 VENUE : Ramanujan Lecture Hall, ICTS Bangalore This program is aimed at Master's- and PhD-level students who wish to be exposed to interesting problems in biology that lie at the biology-
From playlist Living Matter 2018
Rajesh Thadani on the Himalaya and the Yale Himalaya Initiative (Full-Length Video Lecture)
In February 2013, Dr Rajesh Thadani, Visiting Fellow of the Yale School of Forestry and Environmental Studies, and Executive Director of the Center for Ecology Development and Research (CEDAR), visited Yale and discussed the cultural, geographical, and ecological issues affecting the Himal
From playlist Yale Himalaya Initiative
Differences Between Natural & Artificial Ecosystems | Ecology & Environment | Biology | FuseSchool
An ecosystem can be defined as a large, highly interconnected area of the planet that is composed of several different biotic and abiotic components. A good example of an ecosystem would be an entire forest or mountain range. A natural ecosystem is made of all the plants, animals, and en
From playlist BIOLOGY: Ecology & Environment