Although it is generally harmless to plant growth in pH-neutral soils, the concentration in acid soils of toxic Al < sup > 3 +</ sup > cations increases and disturbs root growth and function.

Although the pinyin method is easier to learn, root shapes are often preferred by professional typists due to their faster input speed.

Although not described as a democracy by the founding fathers, the United States founders also shared a determination to root the American experiment in the principle of natural freedom and equality.

Although by far the majority of plants able to form nitrogen-fixing root nodules are in the legume family Fabaceae, there are a few exceptions:

Although seldom used in Britain and the United States, root parsley is very common in central and eastern European cuisine, where it is used in soups and stews.

Although the principal square root of a positive number is only one of its two square roots, the designation " the square root " is often used to refer to the principal square root.

Although the rule still applies, the visible fuselage " waisting " can only be seen on a few aircraft, such as the B-1B Lancer, Learjet 60, and the Tupolev Tu-160 ' Blackjack ' — the same effect is now achieved by careful positioning of aircraft components, like the boosters and cargo bay on rockets ; the jet engines in front of ( and not directly below ) the wings of the Airbus A380 ; the jet engines behind ( and not purely at the side of ) the fuselage of a Cessna Citation X ; the shape and location of the canopy on the F-22 Raptor ; and the image of the Airbus A380 above showing obvious area rule shaping at the wing root, which is practically invisible from any other angle.

Although this system dates to the later 5th century BC, it was slow to take root, as it does not appear in official documents until the late 2nd century BC and was not common until the time of Sulla, right before the Empire.

Although the root word is popularly written as being from an unspecified Native American language, there is no evidence for this.

Although experimental work is underway, no current medical treatment of the root cause yet exists.

Although often associated with cold temperatures, the root purpose of hibernation is to conserve food during a period when sufficient food is scarce.

Although its root system is very shallow, it also has several downwardly directed peg roots which anchor it firmly in the soil.

Although any local implementation of DNS can implement its own private root name servers, the term " root name server " is generally used to describe the thirteen well-known root name servers that implement the root name space domain for the Internet's official global implementation of the Domain Name System.

Although the word " optimization " shares the same root as " optimal ", it is rare for the process of optimization to produce a truly optimal system.

Although the root sense of the word " classified " is simply synonymous with " categorized ", it has developed a sense synonymous with " censored " in the context of classified information.

Although checklists like the one in the section above on Characteristics of a root cause are beginning to help, widespread disagreement remains in the types of conditions that can reasonably be considered root causes.

Although Quebec independence is a political question, cultural concerns are also at the root of the desire for independence.

Although their root buttressing is a potential feature, the Moreton Bay Fig is poorly suited to bonsai as their large leaves do not reduce much in size and they have long internodal growth.

Although human morphology is not necessarily the ideal form for working robots, the fascination in developing robots that can mimic it can be found historically in the assimilation of two concepts: simulacra ( devices that exhibit likeness ) and automata ( devices that have independence ).

Although the Indian and Greek concepts of the atom were based purely on philosophy, modern science has retained the name coined by Democritus.

Although many board games have a jargon all their own, there is a generalized terminology to describe concepts applicable to basic game mechanics and attributes common to nearly all board games.

Although Haeckel's ideas are important to the history of evolutionary theory, and he was a competent invertebrate anatomist most famous for his work on radiolaria, many speculative concepts that he championed are now considered incorrect.

Although any amount of rock emplacement and rock deformation can occur, and they can occur any number of times, these concepts provide a guide to understanding the geological history of an area.

Although these concepts overlap to some extent, each has its own uses and requirements and is designed and optimized differently.

Although cognitive-behavioural theories of hypnosis must be distinguished from cognitive-behavioural approaches to hypnotherapy, they share similar concepts, terminology, and assumptions and have been integrated by influential researchers and clinicians such as Irving Kirsch, Steven Jay Lynn, and others.

Although the present-day concepts of literacy have much to do with the 15th century invention of the movable type printing press, it was not until the Industrial Revolution of the mid-19th century that paper and books became financially affordable to all classes of industrialized society.

Although most of them depict Nasreddin in an early small-village setting, the tales, like Aesop's fables, deal with concepts that have a certain timelessness.

Although nanotechnology is a relatively recent development in scientific research, the development of its central concepts happened over a longer period of time.

Although a countout can technically be considered a disqualification ( as it is, for all intents and purposes, an automatic loss suffered as a result of violating a match rule ), the two concepts are often distinct in wrestling.

Although there are wide differences in viewpoint among these and other proponents of pragmatic theory, they hold in common that truth is verified and confirmed by the results of putting one's concepts into practice.

Although Utopianism is typically a Renaissance movement, combining the classical concepts of perfect societies of Plato and Aristotle with Roman rhetorical finesse ( cf.

Although both authors ' later work often elaborated on concepts first discussed in Illuminatus !, the pair never collaborated again.

Although undeniably a cornerstone of organic chemistry, Hückel's concepts were undeservedly unrecognized for two decades.

Although the metric system has changed and developed since its inception, its basic concepts have hardly changed-it was designed for transnational use ; it consisted of a basic set of units of measurement, now known as base units ; derived units were built up from the base units using logical rather than empirical relationships while multiples and submultiples of both base and derived units were decimal based and identified by a standard set of prefixes.

Although this article deals primarily with deixis in spoken language, the concepts can apply to written language, gestures, and communication media as well.

Although privateering commissions and letters of marque were originally distinct legal concepts, such distinctions became purely technical by the eighteenth century.

Although Leiber credited his friend, Harry Otto Fischer, with the original concepts for the characters, it was Leiber who wrote nearly all the stories.

Although a ZEB uses multiple passive solar building design concepts, a ZEB is usually not purely passive, having active mechanical renewable energy generation systems such as: wind turbine, photovoltaics, micro hydro, geothermal, and other emerging alternative energy sources.

Although the concepts of a law or principle in nature is borderline to philosophy, and presents the depth to which mathematics can describe nature, scientific laws are considered from a scientific perspective and follow the scientific method ; they " serve their purpose " rather than " questioning reality " ( philosophical ) or " statements of logical absolution " ( mathematical ).

Although the T95 never entered production, a number of its concepts were used on the M60 Patton, and during the development stage ( as the XM60 ) the siliceous-cored armour was at least considered for use, although it was not a feature of the production vehicles.

Although it relies on quantum mechanics principles to operate, its basic concepts are easily explained.

Although not commercial successes, Dear World ( 1969 ) starring Angela Lansbury, Mack & Mabel ( 1974 ) starring Robert Preston and Bernadette Peters, and The Grand Tour ( 1979 ) starring Joel Grey are noted for their interesting concepts and their melodic, memorable scores.