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The success of the AMMI model in predicting lucerne yields for cultivars with differing dormancy characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MarieF. Smith --- , Republic of South Africa A. Smith --- , Republic of South AfricaThe AMMI model, which incorporates both additive and multiplicative components into an integrated, powerful, least squares analysis, is used for the analysis of cultivar trials at different localities. These trials are a major experimental component in crop production and plant... -
On Polynomial and Multiplicative Radicals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: S. Tumurbat R. WiegandtWe show that polynomial and multiplicative radicals in [1] are special cases of radicals defined by means of elements. We scrutinize the way of defining a radical γG by a subset G of polynomials in noncommuting indeterminates. Defining polynomial radicals,... -
Core Function Based Characterizations Of Number Theoretic Functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Temba ShonhiwaThe paper briefly studies the core function: γ(n) = πω i-1 pi, n > 1, γ(1) = 1, where n = πω i=1 p i ci and then provides characterizations of number theoretic functions based on convolutions involving this function. -
Genotype × environment interactions and yield stability of stress-tolerant open-pollinated maize varieties in the Eastern Cape province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vimbayi GP Chimonyo --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Charles S Mutengwa --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Cornelius Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South AfricaGenotype × environment interactions are inherent in multilocational trials and complicate identification of superior genotypes. The aim of the study was to determine yield performance and stability of 13 maize genotypes in five locations of the Eastern Cape province, South... -
Agronomic performance of new cream to yellow-orange sweetpotato cultivars in diverse environments across South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sunette M Laurie --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Sidwell S Tjale --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Andre A van den Berg --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Musa M Mtileni --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Maryke T Labuschagne --- Department of Plant Sciences, South AfricaSweetpotato is grown in diverse environments of South Africa by both commercial and subsistence farmers. The aim of the present study was to assess the stability, agronomic performance and palatability of new ARC cultivars bred for the informal market, and... -
On evaluating multivariate polynomials over finite fields
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Edoardo Ballico --- Via Sommarive 14, Italy Michele Elia --- Dipartimento di Elettronica, Politecnico di Torino, ItalySome evaluation methods of multivariate polynomials over finite fields are described and their multiplicative complexity is discussed. -
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Two new algebraic structures more general than weak rings
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Teng Zhang --- Zhejiang University of Science and Technology, ChinaIn 1994, Bergelson and Hindman established a remarkable result for IP* sets: for any IP* set A and any sequence l in ℕ, there exists a sum subsystem l′ of l such that all finite sums and finite products of...