Farm attack victims are usually restrained with shoe laces, telephone wires or electric cables, according to a previous AfriForum report.
Some have had their nails pulled out, had boiling water poured over their bodies and been beaten to death with makeshift weapons.
'Some of the murders have been accompanied by gratuitous violence and torture that can only be explained as racial hatred,' Australian National University international law expert Associate Professor Jolyon Ford told SBS.
In January this year, 86-year-old Piet Els and his partner Rikkie Alsemgeest were the alleged victims of a brutal attack which saw four black men storm their farm, beat them with steel pipes and burn them with an iron.
A farmer speaks to South African police after an incident in which a worker was held at gunpoint and a chainsaw was stolen in November last year.
'They tied me to a chair and came with a steam iron they found in the kitchen and burned me,' Ms Alsemgeest told The Daily Telegraph.
'Piet, they burned on his back in three or four places and burned on the back of his leg. They stripped off his skin... I thought Piet was dead because he was lying on the floor.
'They put a cloth in my face and tied me to the chair. They stripped off my top. I was naked. They put some tape over my face and eyes. They took my breast and twisted, humiliating me, not saying a word.'
This week, a 40-year-old farm manager was tied up and hacked to death by a group of attackers, according to local reports. His wife was said to have been raped.
One protester held a bible as he spoke to South African farmers & farm workers gathered at a demonstration to protest against farmer murders in the country in October last year.
Earlier this month, a woman was allegedly 'repeatedly and violently' sexually assaulted in front of her young son as five attackers stormed the family farm.
The group tied the family up in separate rooms and told the woman they would harm her husband if she didn't comply.