North Korean leader Kim Jong-un has visited a tree nursery in his second public field inspection since he was appointed the chairman of the ruling Workers' Party of Korea last week, according to the country's state news outlet on Sunday.

The North's Korean Central News Agency said in a report that Kim made a field guidance to the Tree Nursery No. 122 of the Korean People's Army near Pyongyang that recently upgraded its facilities.

The newswire did not date Kim's visit, but this was Kim's second public appearance reported since the WPK's four-day congress. The KCNA said last week that Kim visited a machinery exhibition after the 7th congress of the WPK.

"(Kim) planned to turn the tree nursery into the one to be proud of in the world so that it might be presented as a gift to the Seventh Congress of the WPK," the KCNA reported. "He expressed great satisfaction over the fact that a combined control system has been successfully built at the tree nursery to ensure the most suitable conditions and environment for cultivating tree saplings."

According to the report, Kim said that the yearly sapling production at the tree nursery is more than 20 million and if all provinces build such "land-saving and manpower-saving" tree nurseries like the No. 122 tree nursery, they will be able to produce 200 million saplings a year.

Last December, Kim visited the facility and asked officials to modernize the tree nursery. He was satisfied that the KPA had carried out his order "without an inch of deflection," the KCNA reported, adding that the leader thanked the officials from the designing unit, construction unit and the scientific research field for "building the tree nursery of the world level."

Kim also expressed "expectation and belief" that the employees of the tree nursery carry out their mission and duty "in turning all mountains of the country into mountains of gold and treasures," the KCNA reported.

The KCNA said that the party's top echelon accompanied Kim to the tree nursery, including KPA Vice Marshal Hwang Pyong-so; Army General Pak Yong-sik, minister of the People's Armed Forces; and O Su-yong, vice-chairman of the WPK Central Committee.

Kim was appointed to the chairmanship at the congress as he further tightened his hereditary power over the country. He has been running the country since late 2011 after the sudden death of his father, Kim Jong-il. (Yonhap)