Latest News Archive

Please select Category, Year, and then Month to display items
Categories
UFS News Media Release Research
Years
2019 2020 2021 2022 2023 2024 2025
Months
January February March April May June July August September October November December
Previous Archive
03 February 2022 | Story NONSINDISO QWABE | Photo UFS Photo Archive
Prof Rodwell Makombe, Associate Professor in the Department of English on the Qwaqwa Campus.
Prof Rodwell Makombe, Associate Professor in the Department of English on the university’s Qwaqwa Campus, will be joining a prestigious group of more than 100 academic staff from African universities for this year’s University of Michigan African Presidential Scholars (UMAPS) programme.

Each year, the programme hosts more than 180 academics from different universities in Africa for a five-month fellowship, providing academics with access to the university’s research libraries and facilities, on-campus housing, health insurance, and a stipend to cover living expenses.

Fellowship an opportunity for collaboration and career growth 
 
The fellowship comes at just the right time for Prof Makombe, who said he is looking forward to mentorship for his growth and career development in a new environment and atmosphere. “I am very excited about this opportunity, which I think has come at the right time. It will expose me to a broad network of scholars, which I need for collaboration purposes, and it will also give me an opportunity to share my research and learn from the experiences of other scholars from different parts of the world. Given that I will be working closely with a faculty member of the university for the duration of the fellowship, the programme will also provide me with the mentorship that I need for my growth and career development.”
 
Apart from the exposure to broad academic and research scholars, he said he was looking forward to having the time and resources to finish writing his second book.

“I have just published my first book in October 2021, and I have already started doing research for my second book. The fellowship will give me time and space to focus on writing the book without the usual interruptions associated with my teaching responsibilities. The book focuses on cultures of resistance in post-Mugabe Zimbabwe. It is a sequel to my recent book,Cultural texts of resistance in Zimbabwe: Music, Memes, Media, which explores discursive resistance in Zimbabwe in the context of crisis.”

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.

 

Economic and Management Sciences

Education

Health Sciences

The Humanities

Law

Natural and Agricultural Sciences

Theology and Religion

Open Distance Learning

Business School

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