Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
14 February 2018 Photo Bonolo Nkoane
First Sesotho soundtrack for fulldome film launched at Naval Hill Planetarium
Tshireletso Nkoane, best known for her television roles in the drama series, Tshisa, the comedy series, Moferefere Lenyalong, as well as the miniseries, Naledi.

In December, the Naval Hill Planetarium used the voice of a well-known South African actress for yet another trailblazer: the first Sesotho soundtrack for a full-dome film.

“It is important for our children to become interested in science and astronomy through exposure to good language use in their mother tongue from an early age, so that we can still make a sound contribution to these fields in the future,” said Prof Matie Hoffman from the Department of Physics at the University of the Free State.

Space Shapes, a child-friendly fulldome film by the Ott Planetarium at the Weber State University in Utah in the US, was translated into Sesotho as Dibopeho tsa Sepakapakeng by Khantlapane Selina Ketla and Dr Andries Hoffman, following last year’s release of the short film by the Naval Hill Planetarium as Ruimtevorms in Afrikaans. The film, created by participants of the 2010 Blender Production Workshop in Utah, takes young audiences on a journey to explore the different shapes found in space.

The voice artist, Tshireletso Nkoane, a star in her own right, is best-known for her television roles in the drama series, Tshisa, the comedy series, Moferefere Lenyalong, as well as the miniseries, Naledi. She has several theatre and radio credits to her name, and also boasts a diploma in Electrical Engineering.

The premiere of this Sesotho trailblazer, as well as the CosmoQuest and Ward Beecher Planetarium’s English fulldome film, Cosmic Castaways, will take place at the Naval Hill Planetarium on Saturday 17 February 2018 at 17:30. Cosmic Castaways is an exciting work that reaches out to places where there are no constellations; where there are still isolated stars to be found in the voids between the galaxies.

Tickets for this double premiere, as well as for the weekly Saturday 17:30 shows, are available from Computicket – just search under ‘planetarium’ on the Computicket website or visit Checkers.

News Archive

Well-established root system important for sustainable production in semi-arid grasslands
2015-02-24

Plot layout where production and root studies were done
Photo: Supplied

The importance of a well-established root system for sustainable production in the semi-arid grasslands cannot be over-emphasised.

A study of Prof Hennie Snyman from the Department of Animal and Wildlife and Grassland Sciences at the University of the Free State is of the few studies in which soil-water instead of rainfall has been used to estimate above- and below-ground production of semi-arid grasslands. “In the past, plant ecological studies have concentrated largely on above-ground parts of the grassland ecosystem with less emphasis on root growth. This study is, therefore, one of the few done on root dynamics in drier areas,” said Prof Snyman.

The longevity of grass seeds in the soil seed bank is another aspect that is being investigated at present. This information could provide guidelines in grassland restoration.

“Understanding changes in the hydrological characteristics of grassland ecosystems with degradation is essential when making grassland management decisions in arid and semi-arid areas to ensure sustainable animal production. The impact of grassland degradation on productivity, root production, root/shoot ratios, and water-use efficiency has been quantified for the semi-arid grasslands over the last 35 years. Because of the great impact of sustainable management guidelines on land users, this study will be continuing for many years,” said Prof Snyman.

Water-use efficiency (WUE) is defined as the quantity of above- and/or below-ground plant produced over a given period of time per unit of water evapotranspired. Sampling is done from grassland artificially maintained in three different grassland conditions: good, moderate, and poor.

As much as 86, 89 and 94% of the roots for grasslands in good, moderate and poor conditions respectively occur at a depth of less than 300 mm. Root mass is strongly seasonal with the most active growth taking place during March and April. Root mass appears to be greater than above-ground production for these semi-arid areas, with an increase in roots in relation to above-ground production with grassland degradation. The mean monthly root/shoot ratios for grasslands in good, moderate, and poor conditions are 1.16, 1.11, and 1.37 respectively. Grassland degradation lowered above- and below-ground plant production significantly as well as water-use efficiency. The mean WUE (root production included) was 4.79, 3.54 and 2.47 kg ha -1 mm -1 for grasslands in good, moderate, and poor conditions respectively.

These water-use efficiency observations are among the few that also include root production in their calculations.

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept