Prince Charles has told agriculture students in Carmarthenshire he is pleased to see young people continue to take an interest in farming.
He was joined at Coleg Sir Gar by the Duchess of Cornwall on the first leg of the three-day tour of Wales.
Later the duchess met a prize bull named Hafodesgob Hari during a farm visit in Pontyberem.
It is the first Welsh tour since the prince and duchess were married in April.
They started their visit with a tour of the college's new £5m agricultural campus at Gelli Aur near Llandeilo.
Both looked happy and relaxed as they chatted with youngsters and college staff on one of the hottest days of the year so far in the county.
The couple met unemployed youngsters from the Prince's Trust who had just completed a 20-day taster course in farming.
Sean Rees, 22, of Llanelli, showed the couple what he had learned about the machinery at the farm.
"I was nervous at first but during the conversation he made me feel very comfortable.
"There are six of us from Llanelli and six from Pembroke and we have just finished the course.
"We have been doing all aspects of farming and he was very interested in it."
Emma Longbridge of the Prince's Trust said: "It is a short taster course which gives them an idea of what it is like to work in agriculture and what skills are needed."
It is the first summer tour of Wales for the Duchess of Cornwall
The royal couple also met full-time students at the college and farmers' wives and daughters taking IT courses there.
The Prince presented the college's annual agricultural student of the year award to Daniel Davies.
Afterwards Mr Davies said: "I'm still shaking - I did not think I would win.
"He said it was good to see there were young people still interested in dairy farming."
The agricultural theme continued in the afternoon with a visit to a Welsh Black Cattle and dairy farm in the Gwendraeth Valley and a new abattoir at Cross Hands.
When Camilla met Hari - the duchess greets the prize bull in Pontyberem
The afternoon was dominated by a 22,000 guineas prize bull, named Hafodesgob Hari.
The encounter came during a visit to Cwm Berem Farm, in Pontyberem, where the prince, as president of the Welsh Black Cattle Society, viewed a pedigree herd.
The couple were shown into a small enclosure, inhabited by the huge bull, which eyed them both warily.
"I'm going to hold on to here," the Duchess said as she clutched the handle
of the enclosure's door.
They then both joined a group of local farmers of a tour of a nearby field
where pedigree black cattle were grazing.
For the final leg of the day-long visit, the couple travelled a few miles to
the Cross Hands Business Park to officially open an abattoir.
The Cig Calon Cymru Cyf Abattoir, run by Enzo Sauro - the owner of the farm
the couple visited earlier in the day - is due to open later this month.
The couple concluded their tour with a visit to the abattoir shop where they were presented with a Welsh black beef sirloin and fillet steak.
They will spend the night on the royal train in a secret location.