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Articles published from 1984-2014.

Description

Publishes original articles and commentaries on research in the fields of fundamental and applied soil and plant science. Original research papers, short communications including germplasm registrations, relevant book reviews, commentaries on papers recently published and, exceptionally, review articles will be considered for publication in the Journal. Manuscripts considered will address aspects of: Agronomical and Horticultural research including breeding and genetics, cultivar evaluation, management, nutrition, physiology, production, and quality; Soil Science research including biology, chemistry, classification, fertility, mineralogy, pedology and hydropedology, physics, and soil and land evaluation of agricultural and urban ecosystems; Weed Science research including biological control agents, biology, ecology, genetics, herbicide resistance and herbicide-resistant crops, and physiology and molecular action of herbicides and plant growth regulators; Agro-climatology; Agro-ecology; Forage, Pasture and Turfgrass science including production and utilisation; Plant and Soil Systems Modelling; Plant–Microbe Interactions; Plant–Pest Interactions; and Plant–Soil Relationships.

latest article added on October 2013

ArticleFirst AuthorPublished
A complex dormancy mechanism in seeds of the weed Rubus cuneifoliusvan Staden, J.1984

A complex dormancy mechanism in seeds of the weed Rubus cuneifolius

Keywords

Rubus cuneifolius, germination, dormancy, scarification, stratification

Abstract

Both the endocarp and embryo contribute to the dormancy of Rubus cuneifolius seed. Whereas scarification was found to break the dormancy imposed by the endocarp, embryo dormancy could only be overcome by a combination of treatments. These treatments consisted of a one-month stratification period followed by incubation at an alternating temperature ot 10–20 °C in the presence of light. S. Afr. J. Plant Soil 1984, 1: 48–50

Authors

van Staden, J. and Campbell, Peta L.

Year Published

1984

Publication

South African Journal of Plant and Soil

Locations
DOI

10.1080/02571862.1984.10634108

This article contributed by:

Original

Response of five soybean (Glycine max (L.) Merr.) cultivars to lime and phosphorus on an acid Normandien subsoilNoble, A. D.1984

Response of five soybean (Glycine max (L.) Merr.) cultivars to lime and phosphorus on an acid Normandien subsoil

Keywords

Glycine max (L.) Merr., liming, phosphorus, tolerance to aluminium

Abstract

Five soybean cultivars (Hill, Geduld, Forrest, Welkom and Oribi), previously selected for Al tolerance or sensitivity by a rapid seedling evaluation method, were grown in acid soil treated with varying rates of lime and P. After 35 days the plants were harvested and measurements of leaf area, shoot, root and nodule dry mass as well as elemental analysis were carried out. Lime had a significant effect on growth whilst P had relatively little effect. Classification for tolerance to soil acidity appeared to depend on the criterion used in the classification. Agreement with the ‘rag doll’-classification was obtained when comparing the cultivars, with respect to their relative shoot and leaf area yields, at the unlimed and first liming level. In the absence of lime the highest shoot yield occurred at the Intermediate level of P. Forrest appeared to perform consistently poorly in unlimed soils and could be classified as highly sensitive to acid soil infertility. However, it would be speculative lo classify the other cultivars into tolerant sensitive or intermediate groups. There was a strong indication that yield depressions in Forrest may not be attributed entirely to Al toxicity and that the relative balance of P, Fe and Cu may be involved Significant decreases in plant Al, Zn, Fe, Mn and Mg were observed with Increasing lime levels. S. Afr. J. Plant Soil 1984, 1: 51–56

Authors

Noble, A. D., Lea, J. D. and Fey, M. V.

Year Published

1984

Publication

South African Journal of Plant and Soil

Locations
DOI

10.1080/02571862.1984.10634109

This article contributed by:

Original

Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchangeKotzé, W. A.G.1984

Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange

Keywords

Exchangeable aluminium, isotopic exchange, clay minerals

Abstract

Isotopically exchangeable Al was determined in soils and clay minerals by equilibration with 28Al. Best results were obtained with a weak extractant and an equilibration time of eight min. The calculated amount of isotopically exchangeable Al was independent of the amount of carrier-Al added with the 28Al. In some soils isotopically exchangeable Al did not appear to be related to the amount of Al which could be extracted by various electrolyte solutions. This technique provides an improved means of studying the exchange reactions of Al in acid soils and clay minerals. S. Afr. J. Plant Soil 1984, 1: 57–60

Authors

Kotzé, W. A.G., Joubert, Marlise, de Villiers, Johannes. F., van der Westhuizen, M. and van der Bank, D.

Year Published

1984

Publication

South African Journal of Plant and Soil

Locations
    DOI

    10.1080/02571862.1984.10634110

    This article contributed by:

    Original

    Pedogeomorphic aspects of the Roodepoort area, Transvaal: Soil depth-slope relationshipsMunnik, M. C.1984

    Pedogeomorphic aspects of the Roodepoort area, Transvaal: Soil depth-slope relationships

    Keywords

    Pedogenesis, geomorphology, soil formation, soil depth-slope relationships

    Abstract

    Fifty hillslope profiles with associated soils in the Roodepoort area, Transvaal, were examined to determine the relationships between soil depth and hillslope characteristics. A meso-scale approach was adopted which implied the relationship between three soil depth phases and the hillslope units on a scale of 1:10 000. Although anomalies occur, it was found with the aid of statistical techniques, that a definite trend exists between soil depth and slope gradient. For the less than 8% slope class, soil depth variations could be ascribed to differences in parent rock and position in the landscape, whereas for slopes steeper than 8% slope, gradient apparently becomes the dominant determinant of the shallow soil depth. Because the soil depth-hillslope relationships were sufficiently well established by this study, it enabled the construction of three models to represent the varied conditions of the Roodepoort area. S. Afr. J. Plant Soil 1984, 1: 61–66

    Authors

    Munnik, M. C., Verster, E. and van Rooyen, T. C.

    Year Published

    1984

    Publication

    South African Journal of Plant and Soil

    Locations
    DOI

    10.1080/02571862.1984.10634111

    This article contributed by:

    Original

    Factors affecting the activity of atrazine in plants and soilNel, P. C.1984

    Factors affecting the activity of atrazine in plants and soil

    Keywords

    Atrazine, phytotoxicity, atrazine fixation and release in soil, environmental factors

    Abstract

    Available research findings concerning (he activity of atrazine in the plant and soil are presented in a brief review. The role of the environment is emphasized. This review is supplemented by recent research results of the University of Pretoria concerning evaluation of soil characteristics as a norm for the prediction of atrazine activity in turf soils, the comparison of a few maize hybrids with respect to their resistance towards atrazine and the influence of moisture and temperature on atrazine activity in light-textured soils. Guidelines for future research and for the use of atrazine are given. S. Afr. J. Plant Soil 1984, 1: 67–72

    Authors

    Nel, P. C. and Reinhardt, C. F.

    Year Published

    1984

    Publication

    South African Journal of Plant and Soil

    Locations
    DOI

    10.1080/02571862.1984.10634112

    This article contributed by:

    Original

    The soil seed bank under nasella tussock infestations at BoschbergJoubert, D. C.1984

    The soil seed bank under nasella tussock infestations at Boschberg

    Keywords

    Nassella tussock, Stipa trichotoma, soil seed bank

    Abstract

    Nassella tussock (Stipa trichotoma Nees.) has a high annual production of seeds per plant. The total seed bank of all plants counted under a dense nassella infestation varied between 50 000 and 100 000 seeds m−2 surface area (5 cm deep) of which more than half were nassella. Seeds were recovered from soil samples by wet-sieving, chemical flotation and aspiration. Burning of the dead organic material on the soil surface destroyed about 20% of the nassella seeds present in the top layers, suggesting that this treatment could become a useful part of a control strategy. S. Afr. J. Plant Soil 1984, 1: 1–3

    Authors

    Joubert, D. C.

    Year Published

    1984

    Publication

    South African Journal of Plant and Soil

    Locations
    DOI

    10.1080/02571862.1984.10634099

    This article contributed by:

    Original

    The response of Bambara groundnut (Voandzeia subterranea) and pigeon pea (Cajanus cajan) to applications of lime, P and KWassermann, V. D.1984

    The response of Bambara groundnut (Voandzeia subterranea) and pigeon pea (Cajanus cajan) to applications of lime, P and K

    Keywords

    Voandzeia, Cajanus, lime, P, K

    Abstract

    Voandzeia subterranea and Cajanus cajan are important pulse crops in tropical and subtropical Africa and their drought hardiness and ability to utilize poor soils are inter alia reasons for this popularity. Both species hold considerable promise as crops in South Africa. The results of a pot trial and a field trial in which the responses of these two species to lime, phosphorus and potassium applications were compared with those of Vigna unguiculata, V. radiata and Arachis hypogaea are reported. The generally held belief that C. cajan is able to produce well with a minimum of fertilizer was confirmed in this investigation, particularly in the field trial where no yield responses to applications of lime, phosphorus and potassium could be measured on a rather poor soil. V. subterranea, on the other hand, responded better, particularly to lime application. Contrary to what is generally claimed in the literature, there was no indication that V. subterranea is able to produce better than the common groundnut (A. hypogaea) at low levels of soil fertility. In fact, it has to be concluded from the results that this species is not as tolerant to acid soils as the common groundnut. S. Afr. J. Plant Soil 1984, 1: 4–8

    Authors

    Wassermann, V. D., Kruger, A. J. and Heyns, Gillian

    Year Published

    1984

    Publication

    South African Journal of Plant and Soil

    Locations
    DOI

    10.1080/02571862.1984.10634100

    This article contributed by:

    Original

    Nitrogen fertilization of cabbages in NatalRichards, T.1984

    Nitrogen fertilization of cabbages in Natal

    Keywords

    Brassica oleracea, cabbages, fertilization, nitrogen

    Abstract

    Cabbage (Brassica oleracea var. capitata f. alba cv. Gloria Osena) yields were measured in two experiments on a Westleigh soil near Pietermaritzburg in response to different methods, rates and times of application of nitrogen fertilizer. Levels ranging from 0–375 kg N ha−1 were tested. The result was an almost linear increase in yield with increasing nitrogen up to the highest level applied in the first trial. In the second trial no significant increase in yield was recorded from 75 kg N ha−1 up to 375 kg N ha−1. In this trial nitrogen applied by banding and broadcasting produced similar results. There was a significantly better yield when half the nitrogen was applied before planting and half four weeks after transplanting, in comparison with all being applied before planting, or one third before planting with two top-dressings and one quarter before planting with three top-dressings. S. Afr. J. Plant Soil 1984, 1: 9–11

    Authors

    Richards, T., Smith, I. E. and Bennett, R.

    Year Published

    1984

    Publication

    South African Journal of Plant and Soil

    Locations
    DOI

    10.1080/02571862.1984.10634101

    This article contributed by:

    Original

    An analysis of the ET/Ep-curve and its application irrigation schedulingBurgers, M. S.1984

    An analysis of the ET/Ep-curve and its application irrigation scheduling

    Keywords

    ET/Ep-curve, irrigation scheduling

    Abstract

    The well known sigmoidel ET/Ep -curve often quoted in the literature for a variety of crops, merely depicts a smoothed curve drawn through points representing the average ET/Ep ratio for each depletion cycle co-ordinated with the middle day of the cycle. In this form it is of little use for monitoring the water balance of a crop during periods shorter than a normal irrigation cycle. The seasonal curve can be broken down into a number of separate curves based on the actual ET/Ep ratios (fi) within each depletion cycle. From these fi-curves, hypothetical curves were derived from which cumulative soil moisture depletion up to a given day within an irrigation cycle can be deduced with ease. This approach provides a way in which the efficiency of rain precipitation can be estimated to a higher degree of accuracy so that the irrigation programme can be adjusted accordingly. S. Afr. J. Plant Soil 1984, 1: 12–16

    Authors

    Burgers, M. S. and Nel, P. C.

    Year Published

    1984

    Publication

    South African Journal of Plant and Soil

    Locations
      DOI

      10.1080/02571862.1984.10634102

      This article contributed by:

      Original

      Die rol van sekere omgewingsfaktore by alachloraktiwiteitReinhardt, C. F.1984

      Die rol van sekere omgewingsfaktore by alachloraktiwiteit

      Keywords

      Alachlor, clay percentage, herbicide, organic matter, soil moisture, temperature

      Abstract

      Biotoetse met graansorghum (Sorghum bicolor L.) is in potte in glashuise en groeikabinette uitgevoer. Geselekteerde grond- eienskappe is gekorreleer met alachloraktiwiteit. Organiese materiaalinhoud (% C) was die beste gekorreleerd met die aktiwiteit van alachlor en pH die swakste. Die r-waardes vir % C en kleipersentasie was 0,76 en 0,68 onderskeidelik. In meer- voudige regressie-analises is die grootste R 2 -waarde met organiese materiaalinhoud en kleipersentasie verkry. Die effek van grondvog en temperatuur op die aktiwiteit van alachlor is ook ondersoek. By 20/10, 25/15 en 30/20 °C dag/nag- temperatuurregimes was alachloraktiwiteit hoog in die grond by veldkapasiteit en versadigingspunt (2 × veldkapasiteit), maar laag in lugdroë grond. S.-Afr. Tydskr. Plant Grond 1984, 1: 17–20

      Authors

      Reinhardt, C. F. and Nel, P. C.

      Year Published

      1984

      Publication

      South African Journal of Plant and Soil

      Locations
      DOI

      10.1080/02571862.1984.10634103

      This article contributed by:

      Original

      Recent Articles

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      by Turner, David P

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