Results 21 to 30 of about 25,838,732 (318)

Bernstein-Szego Polynomials Associated with Root Systems [PDF]

open access: yes, 2007
We introduce multivariate generalizations of the Bernstein-Szego polynomials, which are associated to the root systems of the complex simple Lie algebras.
de la Maza, A. C.   +2 more
core   +1 more source

Non-orthogonal geometric realizations of Coxeter groups [PDF]

open access: yes, 2012
We define in an axiomatic fashion a \emph{Coxeter datum} for an arbitrary Coxeter group $W$. This Coxeter datum will specify a pair of reflection representations of $W$ in two vector spaces linked only by a bilinear paring without any integrality and non-
Bourbaki   +6 more
core   +1 more source

Plant Protection Research Institute

open access: yesBothalia: African Biodiversity & Conservation, 1993
A survey of the mycorrhizal status of plants growing in the Cape Floristic Region of South Africa was undertaken to assess the range of mycorrhizal types and their dominance in species characteristic of this region.
N. Allsopp, W. D. Stock
doaj   +1 more source

A simple and cost-effective method for cable root detection and extension measurement in estuary wetland forests [PDF]

open access: yes, 2016
This work presents the development of a low-cost method to measure the length cable roots of black mangrove (Avicennia germinans) trees to define the boundaries of central part of the anchoring root system (CPRS) without the need to fully expose root ...
Barradas, Guadalupe   +4 more
core   +1 more source

Parâmetros morfológicos para estabelecer tolerância diferencial à toxicidade de alumínio em cultivares de arroz Morphological parameters to determine differential tolerance of rice cultivars to aluminium toxicity

open access: yesPesquisa Agropecuária Brasileira, 2002
Dois experimentos em casa de vegetação foram conduzidos visando identificar parâmetros morfológicos ligados à tolerância ao alumínio (Al) e estabelecer a concentração de Al e o tempo de cultivo suficientes para a expressão da tolerância ao Al, em duas ...
Steel Silva Vasconcelos   +2 more
doaj   +1 more source

Generalised Calogero-Moser models and universal Lax pair operators [PDF]

open access: yes, 1999
Calogero-Moser models can be generalised for all of the finite reflection groups. These include models based on non-crystallographic root systems, that is the root systems of the finite reflection groups, H_3, H_4, and the dihedral group I_2(m), besides ...
A. J. Bordner   +3 more
core   +2 more sources

CRootBox: A structural-functional modelling framework for root systems

open access: yesbioRxiv, 2017
Background and Aims Root architecture development determines the sites in soil where roots provide input of carbon and take up water and solutes. However, root architecture is difficult to determine experimentally when grown in opaque soil.
A. Schnepf   +9 more
semanticscholar   +1 more source

Seedling Characteristics of Three Oily Species before and after Root Pruning and Transplant

open access: yesPlants, 2019
Moringa oleifera Lam. (Moringa), Jatropha curcas L. (Jatropha), and Ricinus communis L. (Ricinus) are oily species known by their capability to grow in tropical and subtropical lands.
Ofelia Andrea Valdés-Rodríguez   +1 more
doaj   +1 more source

Imaging and functional characterization of crop root systems using spectroscopic electrical impedance measurements

open access: yesPlant and Soil, 2018
Background and aimsNon- or minimally invasive methods are urgently needed to characterize and monitor crop root systems to foster progress in phenotyping and general system understanding.
M. Weigand, A. Kemna
semanticscholar   +1 more source

Nutrient deficiency effects on root architecture and root-to-shoot ratio in arable crops

open access: yesFrontiers in Plant Science, 2023
Plant root traits play a crucial role in resource acquisition and crop performance when soil nutrient availability is low. However, the respective trait responses are complex, particularly at the field scale, and poorly understood due to difficulties in ...
G. López   +15 more
semanticscholar   +1 more source

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