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Topic: Root system


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In the News (Tue 1 Dec 09)

  
  Root Development of Vegetable Crops: Chapter XX
The root system was characterized by a strong, nearly vertically descending taproot and multitudes of long, horizontal branches arising mostly in the 2- to 6-inch soil level (Fig.
Roots from the base of the stem and from the taproot extend horizontally but deviously in the second to the eighth inch of soil to distances of 12 to 24 inches.
In a poorly prepared seed bed the fibrous roots may die and the plant be handicapped by the partial or complete loss of that portion of its root system occupying the richest part of the soil.
www.soilandhealth.org /01aglibrary/010137veg.roots/010137ch20.html   (5621 words)

  
 Root system - Wikipedia, the free encyclopedia
In mathematics, a root system is a configuration of vectors in a Euclidean space satisfying certain geometrical properties.
Whenever Φ is a root system in V and W is a subspace of V spanned by Ψ=Φ∩W, then Ψ is a root system in W.
In general, irreducible root systems are specified by a family (indicated by a letter A to G) and the rank (indicated by a subscript).
en.wikipedia.org /wiki/Root_system   (1241 words)

  
 Fibrous root system - Wikipedia, the free encyclopedia
A fibrous root system (sometimes also called adventitious root system) is the opposite of a tap root system.
A fibrous root system is universal in monocotyledonous plants and ferns, and is also common in dicotyledonous plants.
A typical mature tree 30-50 m tall has a root system that extends horizontally in all directions as far as the tree is tall or more, but well over 95% of the roots are in the top 50 cm depth of soil.
en.wikipedia.org /wiki/Fibrous_root_system   (159 words)

  
 Root directory - Wikipedia, the free encyclopedia
In computer file systems, the root directory is the first or top-most directory in a hierarchy.
To use the example of a physical file cabinet, if the separate drawers in the file cabinet are represented as the highest level of sub-directories in the file system, then the room the file cabinet is in may be representated as the root directory.
Specific to Unix and similiar operating systems, each process has its own idea of what the root directory is. For most processes this is the same as the system's actual root directory, but it can be changed by calling the chroot system call.
en.wikipedia.org /wiki/Root_directory   (326 words)

  
 The Whitcomb™ System
A more fibrous root system means a greater surface area and translates to a greater efficiency in the absorption of water and nutrients; an increase in growth rate, establishment, and vigor; a higher transplant survivability; and ultimately, superior performance for your customers.
By now the system has been in effect for at least 2 growing seasons and we are dealing with a tree/shrub of considerable size and a well-branched root system.
Root death on the sun-exposed side of a fl plastic container is a common, frustrating occurrence.
www.rootmaker.com /whitsys.php   (2246 words)

  
 Root Development of Vegetable Crops: Chapter XXVI
Summarizing, the root system of a tomato plant of average size filled the soil on all sides of the plant to 2 to 2.5 feet and to a depth of over 3 feet.
In fact, the new set of roots possesses greater vigor than those on a seedling that has not been allowed to wilt; in the latter case the roots are not injured beyond recovery, and it appears that their recovery prevents the prompt development of new ones.
Pruning the roots by pulling on the plants and thus breaking the root system to a considerable extent stimulates early ripening of the fruit.
www.soilandhealth.org /01aglibrary/010137veg.roots/010137ch26.html   (7154 words)

  
 [No title]   (Site not responding. Last check: 2007-11-07)
All the soil was removed from the root plate with a high pressure water jet, and the stem was cut from the root plate at the root collar.
The device consists of a system electronics unit, a magnetic generator (transmitter = emetteur magnétique, a triad of electromagnetic coils, enclosed in a 54 cm diameter acrylic sphere) and a small pointer (receiver = récepteur) directed towards the points to be measured.
Root system of a 25-year-old ash from a plantation on sandy soil near Selestat (Elsass, France).
www.chez.com /mdrexhage   (1629 words)

  
 Roots
The root system of a flowering plant begins its development from the hypocotyl of the embryo of the seed which gives rise to the primary root.
The main or primary root is known as the tap root; together with its many branch roots it forms a tap root system e.g.
Roots form a passage way for water and dissolved substances from the root into the stem and also for foods from the stem down into the root.
www.botany.uwc.ac.za /sci_ed/grade10/anatomy/roots.htm   (1027 words)

  
 Root Nameserver Year 2000 Status
The root of the Internet namespace consists of a single file, the root zone file, which describes the delegations of the top level domains and the associated records necessitated by the DNS protocol to implement those delegations.
The root servers themselves all use some variant of the Unix operating system, however both the hardware base and the vendors' Unix variants are relatively diverse: of the 13 root servers, there are 7 different hardware platforms running 8 different operating system versions from 5 different vendors.
The root name server operators have taken what steps they can to minimize the impact of such failures, however most of these systems are beyond the control or influence of the root name server operators, thus problems may yet exist.
www.icann.org /committees/dns-root/y2k-statement.htm   (1913 words)

  
 Roots, Botany Course, Master Gardener Training, Extension Service, Oregon State University
However, it's important to understand plant root systems because they have a pronounced effect on a plant's size and vigor, method of propagation, adaptation to soil types, and response to cultural practices and irrigation.
Roots typically originate from the lower portion of a plant or cutting.
Root hairs are delicate, elongated epidermal cells that occur in a small zone just behind the root's growing tip.
extension.oregonstate.edu /mg/botany/roots.html   (403 words)

  
 ISUE - Tree Roots   (Site not responding. Last check: 2007-11-07)
Roots usually begin to grow before the tree top does, although root growth is cyclic and responds to environmental changes such as soil depth, water supply, aeration, mineral supply, and temperature.
It is these small parts of the root system that are the primary water and nutrient absorbers.
The type of roots formed initially is specific to a given species; with age the initial root form is often modified by the growing environment.
www.extension.iastate.edu /pages/tree/roots.html   (503 words)

  
 Root system and Shoot System   (Site not responding. Last check: 2007-11-07)
Root deployment and shoot growth for two desert species in response to soil rock...
Effect of nitrogen on root and shoot relations and gas exchange in winter wheat...
Dual Regulation of the Arabidopsis High-Affinity Root Iron Uptake System by Loca...
www.scienceoxygen.com /botany/4.html   (284 words)

  
 PlanetMath: root system   (Site not responding. Last check: 2007-11-07)
A root system is a key notion in the the classification and the representation theory of reflection groups and of semi-simple Lie algebras.
A root system is a finite spanning set
This is version 8 of root system, born on 2002-12-04, modified 2005-08-20.
planetmath.org /encyclopedia/RootSystem.html   (133 words)

  
 Maple Tree Root System
The maple tree root system is one of the most important factors to consider before planting a maple tree in a home garden.
The silver maple tree root system is one of the most intrusive of all the maple tree root systems.
The Norway maple tree root system is not as powerful as that of the silver maple tree, so structural damage to a house or building is not nearly as likely.
www.aboutmapletrees.com /maple_tree_root_system.shtml   (294 words)

  
 lb4pg3   (Site not responding. Last check: 2007-11-07)
The root constitutes the underground portion of the plant axis.
The anchoring ability of the root depends on the substrate in which they are found, the size of the roots and the mode of root branching.
Stele -- the central portion of the root whose outer extremity is termed the pericycle.
io.uwinnipeg.ca /~simmons/lb4pg3.htm   (421 words)

  
 MSN Encarta - Search Results - root system   (Site not responding. Last check: 2007-11-07)
Root Directory, in computer science, in a disk-based hierarchical computer directory structure, the point of entry into the directory “tree.”...
Europeans craved cane sugar as soon as they encountered it in the 11th century during the early Crusades in the Middle East.
Finding the square root of a number is the inverse operation of squaring that number.
encarta.msn.com /root+system.html   (184 words)

  
 CERT®/CC Steps for Recovering from a UNIX or NT System Compromise
Note that all actions taken during your recovery from a system compromise should be in accordance with your organization's policies and procedures.
When looking for modifications of system software and configuration files, keep in mind that any tool you are using on the compromised system to verify the integrity of binaries and configuration files could itself be modified.
NT systems generally log everything to one of three logs for NT events, all of which are viewed through the Event Viewer.
www.cert.org /tech_tips/root_compromise.html   (4788 words)

  
 JFS as the Root File System
File systems in which the local root file system is a whole-disk file system are not affected.
File systems used for NFSD Diskless clusters, in which the root file system is an NFS mount to a file system tree on a server, are not affected.
Kernel support of JFS file systems was present in earlier releases; the kernel now also supports JFS file systems as the root file system.
docs.hp.com /en/5964-5283/ch02s08.html   (632 words)

  
 RS.NET - Root System Persistant Testbed
In 1998, the root server operators discussed the need to have a coordinated, persistent facility to evaluate three major changes to the DNS that are being considered by the IETF for Standards action.
Work progressed in 1999 and 2000, with a preliminary report on the impact of native IPv6 on the root server system, testing for the RSSAC report on Y2K impact, and inputs into a joint IAB/IESG/RSSAC meeting on transition issues for a dual stack IPv4/IPv6 DNS system.
Operational use of TSIG for the production root system was developed in the testbed.
www.rs.net   (304 words)

  
 ICANN | Committees | DNS Root Server System Advisory Committee
The initial chairman of the DNS Root Server System Advisory Committee shall be appointed by the Board; subsequent chairs shall be elected by the members of the DNS Root Server System Advisory Committee pursuant to procedures adopted by the members.
Development of operational procedures for the root system, including formalization of contractual relationships under which root servers throughout the world are operated.
Work is proceeding on defining appropriate agreements and technical measures to operate the root nameserver system according to the guidance in RFC 2870.
www.icann.org /committees/dns-root   (759 words)

  
 Levitated | Root Gardener
The Root Gardener is a system of selective recursive growth.
The recursive root system is a reoccuring theme at Levitated.
In this system, the growth of root elements is controlled by the user through careful selection.
www.levitated.net /daily/levRootGardener.html   (116 words)

  
 The Root System
This is the base of the trunk where the root system begins You should see that part of the trunk where it spreads out to become roots, like your palm and fingers flare out from your wrist.
The total root mass is extremely limited at the bottom of the root ball and this tree will suffer stress.
The trunk should be firmly attached to the root mass, the trunk flare should be obvious where the trunk enters the root mass, and you should not see large encircling roots at the surface.
www.tlcfortrees.info /root_system.htm   (1041 words)

  
 Root Filesystem
There are many options, and the best one will generally depend on whether your system needs to be able to store persistent data (which must survive power cycling) in the field.
If your system has a hard disk, you can start by using NFS then build a root file system on the disk and boot from that.
Note that the minix file system code in Linux is not endian-independant, so you can't build a minix file system image on an x86 machine and expect to read it on a PowerPC machine.
penguinppc.org /embedded/howto/root-filesystem.html   (679 words)

  
 Root
Also known as an admin, administrator, and gatekeeper, root is a super user on a computer network.
Generally a root is used to refer to the system administrator on a UNIX / Linux network and is an individual who has complete access to a network.
Users in the Microsoft recovery console can set the current directory to the system root directory by using the systemroot command.
www.computerhope.com /jargon/r/root.htm   (130 words)

  
 /root file system full   (Site not responding. Last check: 2007-11-07)
Check the contents of root's home directory, /root -- you should never log into the system as root, especially not via a graphical login.
There shouldn't be much stuff in /root at all.
There probably shouldn't be any subdirectories of /root, except for the stuff under /root/.ssh To search the root partition for files matching certain conditions, use the find(1) command.
lists.freebsd.org /pipermail/freebsd-questions/2004-March/038536.html   (326 words)

  
 The ROOT Object I/O System
The system is designed to be particularly efficient for objects frequently manipulated by physicists: histograms, ntuples, trees and events.
The ROOT compression algorithm is based on derivatives of the well known gzip algorithm.
An example of a ROOT based event structure is described in NA49 classes.
root.cern.ch /root/InputOutput.html   (2303 words)

  
 Biobarrier® Root Control Barrier made of nonwoven, polypropylene geotextile fabric with nodules containing ...
Biobarrier Root Control System prevents tree roots from growing in a zone around the fabric.
Placed between a tree root and the area to be protected, such as a sidewalk, road, building, golf course green or anywhere that roots can cause damage, Biobarrier creates a barrier that causes roots to grow in another direction.
Trifluralin prevents root tip cells from dividing, which is the method by which roots grow.
www.biobarrier.com /biobinfo.html   (141 words)

  
 Different types of roots
The roots of a plant are connected differently in different plant species and this is known as the
In many dicotyledonous plants this root greatly enlarges to become the most prominent root of the plant and is known as a tap root.
Sometimes it is not so easy to know whether a plant structure is a root or a stem.
www.botany.uwc.ac.za /ecotree/root/roottypes.htm   (211 words)

  
 root server system - a Whatis.com definition   (Site not responding. Last check: 2007-11-07)
On the Internet, the root server system is the way that an authoritative master list of all top-level domain names (such as com, net, org, and individual
On a daily basis, this list is replicated to 12 other geographically dispersed file servers that are maintained by an assortment of agencies.
The U.S. government white paper on the Management of Internet Names and Addresses includes a description of the root server system.
searchnetworking.techtarget.com /sDefinition/0,,sid7_gci212922,00.html   (180 words)

  
 Gentoo Forums :: View topic - Encrypted Root File System, Swap, etc...   (Site not responding. Last check: 2007-11-07)
This is important later because to encrypt a root file system you can't be running on it at the same time.
The kernel will not have access to the root file system to retrieve the encryption module untilt he encryption module is retrieved...
This is the reason that an intermediate root (initrd=/dev/ram) is required to boot.
forums.gentoo.org /viewtopic.php?t=31363   (2862 words)

  
 uCdot | Find your Root File System with MTD
Once a brave soul finally gets the kernel to compile for their system.
During the system init a number of file systems were "discovered".
Even stranger, the root file system is working from a RAM area not a Flash Device.
www.ucdot.org /article.pl?sid=03/01/11/1049210&mode=thread   (1627 words)

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