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The influence of rainfall, competition and predation on seed production, germination and establishment of an encroaching Acacia in an arid Namibian savanna

Autor: David F. Joubert, G.N. Smit, M.T. Hoffman

Publikováno v: Journal of Arid Environments. 91:7-13

Seed production and seedling survival are under-researched in savannas. We investigated these in a population of a major thickening species, Acacia mellifera, in an arid Namibian savanna over a nine year period (late 1998–early 2007) We asked the f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::22e2d20f27cf04cb141663f809693652
https://doi.org/10.1016/j.jaridenv.2012.11.001

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The role of fire in preventing transitions from a grass dominated state to a bush thickened state in arid savannas

Autor: G.N. Smit, M.T. Hoffman, David F. Joubert

Publikováno v: Journal of Arid Environments. 87:1-7

We investigated the role of fire in controlling bush thickening in arid savannas. Three controlled fires were initiated to investigate the responses of planted seedlings, saplings and mature shrubs. The stem diameters of seedlings, saplings and matur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b224e548ff06b3e1800bc14f09e5dbb7
https://doi.org/10.1016/j.jaridenv.2012.06.012

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The status and importance of crude protein and macro minerals in native pastures growing on Vertisols of the central highlands of Ethiopia

Autor: Lemma Gizachew, G.N. Smit

Publikováno v: Journal of Environmental Management. 93:177-184

The effects of pasture management, season and soil nutrient status on crude protein (CP) and macro mineral concentration of native pasture was studied in the Vertisol areas of the central Ethiopian highland. Soil and herbage samples from 18 continuou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::665eee19c5b88e04905bd95a1ea87ee4
https://doi.org/10.1016/j.jenvman.2011.09.003

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A conceptual model of vegetation dynamics in the semiarid Highland savanna of Namibia, with particular reference to bush thickening by Acacia mellifera

Autor: G.N. Smit, David F. Joubert, A. Rothauge

Publikováno v: Journal of Arid Environments. 72:2201-2210

Namibian rangelands are encroached with Acacia mellifera, partially resulting from a poor understanding of vegetation dynamics. A conceptual state-and-transition model of vegetation dynamics in the semiarid Highland savanna in central Namibia, emphas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e7d5425673626e406d4db7f1fc2c4084
https://doi.org/10.1016/j.jaridenv.2008.07.004

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Impact of rangeland degradation on the pastoral production systems, livelihoods and perceptions of the Somali pastoralists in Eastern Ethiopia

Autor: G.N. Smit, Amaha Kassahun, Hennie A. Snyman

Publikováno v: Journal of Arid Environments. 72:1265-1281

Arid and semi-arid rangelands that serve as the resource basis for the livestock production system known as the pastoral production system in Ethiopia are under enormous threat. These rangelands cover about 62% of the national land area and employs a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e84bc374083478f32e95e120b2c739c6
https://doi.org/10.1016/j.jaridenv.2008.01.002

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Relationships between plant and soil nutrient status and position in the landscape on Pellic Vertisols of Ethiopia

Autor: Lemma Gizachew, G.N. Smit

Publikováno v: South African Journal of Plant and Soil. 25:119-126

Effects of land use on soil nutrients and related soil parameters of Pellic Vertisols were assessed using soil samples collected from plots subjected to the cultivation of tef (Eragrostis tef) (TF) and grass pea (Lathyrus sativus) (GP) and native gra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bfb8422e2e435f074747074b7a62141a
https://doi.org/10.1080/02571862.2008.10639905

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