• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
COVENANT UNIVERSITY Course Compact 2014/2015 Session
COVENANT UNIVERSITY Course Compact 2014/2015 Session

... Definition and basic theories of soil bearing capacities. Determination of soil bearing capacity and the maximum loads a soil can hold using the Terzaghi soil capacity formulae. Mention some relationships between the soil classification and bearing capacity by Terzaghi. Understand what retaining wal ...
MANGA DISTRICT EVALUATION EXAMINATION GEOGRAPHY
MANGA DISTRICT EVALUATION EXAMINATION GEOGRAPHY

... - The leaf cover helps to reduce the force of raindrops which would otherwise loosen and remove soil particles if the force is not checked - The rate of infiltration of rainwater into the soil is increased by vegetation cover thus reducing surface run off  - Plant cover breaks the force of wind ...
Bioremediation: Past and Future Practices
Bioremediation: Past and Future Practices

... Principles of ISB  Bacteria occur naturally in subsurface soils and water.  These bacteria have adapted to their environment  Microbial activity is limited by environmental or nutrient factors  When these limiting factors are corrected, the microbial community can degrade the contaminants to bi ...
Elementary Science: Unit at a Glance
Elementary Science: Unit at a Glance

... Unit Problem Scenario: Students will identify erosion and/or soil problems on the school grounds and devise a plan to solve them. Lesson ...


... application in the subsurface raised the Ca and Mg contents in the shoot and roots, and P concentration in the upper leaves of both varieties. Following subsurface limestone application, Ca utilization efficiency decreased for both varieties, by the shoot as well as by roots. The P utilization effic ...
silicate agrominerals as nutrient sources and as soil conditioners for
silicate agrominerals as nutrient sources and as soil conditioners for

... These raw materials are derived from geological resources that undergo industrial processing before turning into a product. Mineral processing involves physical and chemical processes. The physical processes are linked to comminution, separation, mixing, homogenization and heating (fusion). The chem ...
Plant uptake of inorganic waste constituents
Plant uptake of inorganic waste constituents

... Crop plants tolerate only 50-100 ppm foliar Ni. A few crops are much more tolerant of soil Ni (corn, smooth bromegrass) than others which are very sensitive to Ni in acid soils (orchardgrass, peanut, oat). In Ni rich acid soils, nearly every crop plant suffers Ni-induced Fe-deficiency (Roth, Walliha ...
Sodicity - Speedweb
Sodicity - Speedweb

... nutrients because clay surfaces are charged • Different clay types hold different amounts of water and nutrients • Sodicity is often confused with salinity, because both salinity and sodicity are associated with sodium ...
application of geosynthetics and modern materials under kerala
application of geosynthetics and modern materials under kerala

... the rural and command area roads of Gujarat and Maharashtra, over black cotton soils. In Maharashtra, near Satara geo-textile/geogrid combination has been used in State Highways for overlays in black cotton soil areas. Introducing bitumen impregnated nonwoven geo-textiles is also known to improve th ...
Hormonal Control of Flowering
Hormonal Control of Flowering

... Essential elements • Necessary for plant growth • In the absence plant displayed characteristic abnormalities of growth, or deficiency symptoms, reproduction • In 1880 established that at least 10 essential • Essential elements/minerals (inorganic nutrients)- Carbon, hydrogen, oxygen, potassium, ca ...
AG-GH-PS-01.461
AG-GH-PS-01.461

... identified by a code O, A, E, B, C and R ...
GlobalSoilMap.net flyer
GlobalSoilMap.net flyer

... technologies for soil mapping and predicting soil properties at fine resolution. This new global soil map will be supplemented by interpretation and functionality options that aim to assist better decisions in a range of global issues such as food production and hunger eradication, climate change, a ...
What is soil degradation? Ans
What is soil degradation? Ans

... Found at the higher level in the plains at the river terraces away from rivers Clayey and non-porous soil. Less fertile compared to Khadar due to old deposite. ...
BIOL 4120: Principles of Ecology Lecture 5: Terrestrial Environment
BIOL 4120: Principles of Ecology Lecture 5: Terrestrial Environment

... Soil is medium for plant growth; the basis of all terrestrial life. Without soil, there would be no plants, no soil microorganism and no land animals Plants obtain many of their water and nutrients from soil and it provides an place to attach to. ...
SOIL - Gyanpedia
SOIL - Gyanpedia

... • The mixture of rock particles and humus is called the soil. • Soil is one of the most important natural resources .It supports the growth of plants by holding the roots firmly and supplying water and nutrients. • It is the home for many organisms. • Soil is essential for Agriculture. • It provides ...
How Soil Forms Notes
How Soil Forms Notes

... 1] What is Soil? a. ________________________ is the loose, weathered material on Earth’s surface in which plants grow. b. One of the main ingredients of soil is: _______________________ which is the solid layer of rock beneath the soil. 2] Soil Composition a. Soil is comprised of a mixture of rock, ...
Soil
Soil

... appearance alone. The color and texture of soil specimens make it much easier to identify from where they came. ...
Brassica-napus
Brassica-napus

... . Soil contaminated with heavy metals was treated with EDTA at the rates of 0 (control), 3, 6 and 12 mmol/kg. (EDTA was sprayed on the soils surface; concentrations are based on the upper soil layer). After plant sowing, each pot was fertilised with N, P and K using urea (120 mg N/kg), calcium phosp ...
Soil pH and Plant Nutrients
Soil pH and Plant Nutrients

... the associated terminology. Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units. The pH scale goes from 0 to 14 with pH 7 as the neutral point. As the amount of hydrogen ions in the soil increases, the soil pH decreases, thus becoming more acidi ...
Soil
Soil

... Above is a soil profile of northern Ontario. As you can see there are leaves and rocks above the soil. As you begin to dig down several feet you dig into roots and small pebbles. When you get to around 3 feet you begin to hit clay mixed with rocks. This can benefit the growing of plants and crops in ...
AG-NR-03.411-04.1
AG-NR-03.411-04.1

... Rocks and Minerals Glacial Ice– Carried parent materials all over the northern part of the North America during the four separate periods of glaciations – What is glacial drift? • It is the melting and the shrunk between the glacial periods and transported materials remained in deposits. This is ho ...
Forest Soils vs. Agricultural Soils
Forest Soils vs. Agricultural Soils

... materials, which provides nutrients, moisture, and anchorage for land plants. A soil can be considered a product of its environment. Soils are formed from parent material (rocks, volcanic ash, etc.), by the action of living organisms (plants, animals, and man), climate, and topography over time. Soi ...
Lecture 2 - jan.ucc.nau.edu
Lecture 2 - jan.ucc.nau.edu

... solution. This solution contains soluble salts, organic solutes, and some suspended colloids (solids that suspend in a fluid). The behavior of soil water is controlled to a great extend by pore size. Small pores have a great affinity for water and hold it very tightly. Larger pores allow water to es ...
Living Earth.FINAL.77-110
Living Earth.FINAL.77-110

... 2. Upon completion of the task, ask teams to compare and contrast the soils they investigated. Ask them to report for the class the ingredients of their soil. Have the groups discuss the ingredients they found: crushed rocks, crumpled leaves, twigs, bugs, sand, and so on. Many groups will list among ...
Soil
Soil

... Plant cover helps prevent erosion - roots hold the soil in place Vegetation also reduces water loss from the system by evaporation ...
< 1 ... 35 36 37 38 39 40 41 42 43 ... 58 >

Terra preta

Terra preta (Portuguese pronunciation: [ˈtɛʁɐ ˈpɾetɐ], locally [ˈtɛhɐ ˈpɾetɐ], literally ""black earth"" or ""black land"" in Portuguese) is a type of very dark, fertile anthropogenic soil found in the Amazon Basin. Terra preta owes its name to its very high charcoal content, and was made by adding a mixture of charcoal, bone, and manure to the otherwise relatively infertile Amazonian soil. It is very stable and remains in the soil for thousands of years. It is also known as ""Amazonian dark earth"" or ""Indian black earth"". In Portuguese its full name is terra preta do índio or terra preta de índio (""black earth of the Indian"", ""Indians' black earth""). Terra mulata (""mulatto earth"") is lighter or brownish in colour.Terra preta is characterized by the presence of low-temperature charcoal in high concentrations; of high quantities of pottery sherds; of organic matter such as plant residues, animal feces, fish and animal bones and other material; and of nutrients such as nitrogen (N), phosphorus (P), calcium (Ca), zinc (Zn), manganese (Mn). It also shows high levels of microorganic activities and other specific characteristics within its particular ecosystem. It is less prone to nutrient leaching, which is a major problem in most rain forests. Terra preta zones are generally surrounded by terra comum ([ˈtɛhɐ koˈmũ] or [ˈtɛhɐ kuˈmũ]), or ""common soil""; these are infertile soils, mainly acrisols, but also ferralsols and arenosols.Terra preta soils are of pre-Columbian nature and were created by humans between 450 BC and AD 950. The soil's depth can reach 2 meters (6.6 ft). Thousands of years after its creation it has been reported to regenerate itself at the rate of 1 centimeter (0.39 in) per year by the local farmers and caboclos in Brazil's Amazonian basin, who seek it for use and for sale as valuable potting soil.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report