He went round a mosaic depicting leader Kim Jong Il, newly built in the compound of the Central Tree Nursery, and then a room dedicated to the history of the nursery, recollecting the day when he visited it in company with Kim Jong Il in October 2011.

Kim Jong Un noted that Kim Jong Il, who had paid deep attention to the afforestation of the country all his life, left such modern sapling production base as the nursery as a legacy, thus laying a solid foundation for turning the whole country into a thick woodland and greenery.

Then he toured sapling greenhouse, sapling field and other parts of the nursery to learn in detail about how it has implemented the behests of Kim Jong Il.

He expressed great satisfaction over the achievements made by the officials and employees of the Ministry of Land and Environment Protection and the Central Tree Nursery to strictly implement Kim Jong Il's on-site instructions.

He instructed the nursery to turn out more saplings by expanding its sapling production base, perfect the tree planting and rearing method suited to the features of the country and grow saplings not only for timber forest but also for gardening.

It is also needed to push ahead with the work to introduce the advanced science and technology such as acclimating good species of saplings from other countries, he said.

After touring the nursery, supreme leader Kim Jong Un set forth the highly important tasks for turning the whole country into a thick woodland and greenery.

He said that the forest resources of the country shrank in bulk during the Arduous March, the forced march and the state of forest denudation is very serious.

Stressing that there is no space now to step back, leaving bare mountains as they are, he ardently called on the entire party and army and all the people to turn out in a general mobilization for recovering them, deeming this campaign a war with nature as the whole country rose from the debris during the post-war reconstruction.

He said: Since afforestation assumes a protracted nature, we should constantly push ahead with the work to plant and protect trees under a far-sighted plan, bearing deep in mind the aphorism of leader Kim Jong Il that we should live not merely for today but for tomorrow.

He stressed the need to conduct throughout society such mass movement as a movement for wining the titles of socialist patriotic woods and model-forest county.

The work for planting and protecting trees, our noble duty and a supreme patriotic work for the future of the country and its eternal prosperity, should be conducted in a mass campaign, he said, again calling for displaying the army-people coordinated operation’s might to turn the whole country into a thick woodland.

He was accompanied by Choe Ryong Hae, Choe Thae Bok, O Su Yong, Han Kwang Sang and Ri Jae Il.