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25 November 2020 | Story Dr Nitha Ramnath

 

Interdisciplinarity in Action


Lunchtime learning webinar on


The  Intersection between Science and Visual Arts


In this webinar, Prof Willem Boshoff and Prof Louis Scott, both from the University of the Free State, will discuss the intersection between science and the visual arts. The webinar will explore how new levels of understanding may emerge when seemingly unrelated fields of interest intersect, supported by the ideas we may find in the endless diversity of nature.

This webinar is part of a series of three webinars on Interdisciplinarity presented from November to December 2020 via Microsoft Teams for a duration of 45 minutes each. The webinar topics in the series explore the intersection between Neuroscience and Music, between Science and Entrepreneurship, and between Science and Visual Arts. 
 
Date: Tuesday 8 December 2020
Topic: The intersection between science and visual arts 
Time: 13:00-13:45 (SAST)
RSVP: Alicia Pienaar, pienaaran1@ufs.ac.za by 7 December 2020 
Platform: Microsoft Teams

Introduction and welcome
 
Prof Corli Witthuhn – Vice-Rector: Research at the University of the Free State 

Presenters

Prof Willem Boshoff
Willem Boshoff is a Senior Professor in Fine Arts at the University of the Free State. As a conceptual artist, he engages primarily with language. Notably, his works have included the writing of several themed dictionaries, most often made accessible to a broad audience in the form of large art installations. His broad interdisciplinary interests, including the fields of botany, music, and lexicography, have over the years led to the development of a digital research archive, which he recently donated to the University of the Free State.  Prof Boshoff’s work is exhibited extensively, both locally and abroad, and has been included in major private collections and museums. Recently, he became the first South African artist to be awarded an A2 rating by the National Research Foundation (NRF). 

Prof Louis Scott
Prof Louis Scott is a retired professor and mentor in the Department of Plant Sciences at the UFS, with an interest in visual arts. He studies fossil pollen in natural lake, cave, swamp, and fossil dung deposits. He attempts to reconstruct our heritage associated with African prehistory through environmental history, including natural long-term processes of change. Prof Scott is widely published in this field, serves on the editorial boards of international journals, and has a B-rating with the National Research Foundation. 


News Archive

Sunflowers are satellite dishes for sunshine, or are they?
2016-07-20

Eighty-six percent of South Africa’s
sunflowers are produced in the
Free State and North West provinces.

Helen Mirren, the English actress, said “the sunflower is like a satellite dish for sunshine”. However, researchers at the University of the Free State (UFS) have found that too much of this sunshine could have a negative effect on the growth of sunflowers, which are a major source of oil in South Africa.

According to Dr Gert Ceronio from the Department of Soil, Crop, and Climate Sciences at the UFS, extremely high soil temperatures play a definite role in the sprouting of sunflower seedlings. Together with Lize Henning, professional officer in the department, and Dr André Nel from the Agricultural Research Council, he is doing research on biotic and abiotic factors that could have an impact on sunflowers.

Description: Sonneblom 2 Tags: Sonneblom 2

Various degrees of deformity (bad-left
to none-right) in seedlings of the same
cultivar at very high soil temperatures.
Photo: Dr Gert Ceronio

Impact of high temperatures on sunflower production

The Free State and North West provinces, which produce 86% of South Africa’s sunflowers, are afflicted especially by high summer temperatures that lead to extremely high soil temperatures.

Dr Ceronio says: “Although sunflower seeds are able to germinate at temperatures from as low as 4°C to as high as 41°C, soil temperatures of 35°C and higher could have a negative effect on the vegetative faculty of sunflower seedlings, and could have an adverse effect on the percentage of sunflowers that germinate. From the end of November until mid-January, this is a common phenomenon in the sandy soil of the Free State and North West provinces. Soil temperatures can easily exceed the critical temperature of 43°C, which can lead to poor germination and even the replanting of sunflowers.”

Since temperature have a huge impact not only on the germination of sunflower seeds, but also on the vegetative faculty and sprouting of sunflower seedlings, Dr Ceronio suggests that sunflowers should be planted in soil with soil temperatures of 22 to 30°C. Planting is usually done in October and early November. Unfortunately, this is not always possible, as soil moisture is not optimal for growth. Farmers are then compelled to plant sunflowers later.

Impact of herbicides on sunflower growth

“High soil temperatures, combined with the herbicide sensitivity of some cultivars, could lead to the poor development of seedlings," says Dr Ceronio.

The use of herbicides, such as ALACHLOR, for the control of weeds in sunflowers is common practice in sunflower production. It has already been determined that ALACHLOR could still have a damaging effect on the seedlings of some cultivars during germination and sprouting, even at recommended application dosages.

“The purpose of the continued research is to establish the sensitivity of sunflower cultivars to ALACHLOR when exposed to high soil temperatures,” says Dr Ceronio.

 

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