Image copyright Reuters Image caption North Korea is one of the most isolated and secretive countries in the world

North Korea has launched more than 300 new slogans to mark the 70th anniversary of the country's founding.

The slogans covered a wide range of subjects. Workers were urged to "make fruits cascade down" and create a "socialist fairyland".

Wives were told to be dependable, while "sports games [are] to be played in an offensive way", the slogans said.

The isolated country widely uses propaganda to maintain the power of its leader Kim Jong-un.

Several slogans made threats against what North Korea called its enemies. Slogans described the US as "warmongers" and said North Korea would "annihilate them to the last man" if they invaded.

Food production also featured extensively in the slogans. Workers were encouraged to fill the country "with the fragrant smell of fish" and told that "fertiliser means rice and socialism".

Image copyright KCNA Image caption North Koreans have been urged to boost their mushroom production

Another slogan read: "Grow vegetables extensively in greenhouses! Let us turn ours into a country of mushrooms by making mushroom cultivation scientific, intensive and industrialised!"

The country, which is still under nominally communist rule, has suffered from severe famines in the past. Over three million people are believed to have died in the 1996 famine.

Some of North Korea's new slogans

"Let us turn the whole country into a socialist fairyland by the joint operation of the army and people!"

"Serve the country and people! Aid the people! Let the wives of officers become dependable assistants to their husbands!"

"Let this socialist country resound with Song of Big Fish Haul and be permeated with the fragrant smell of fish and other seafoods!"

"Scientists and technicians, stand in the vanguard of the struggle to build a thriving country that is developing, civilising and advancing at a fast pace! Build 'gold mountains' and 'treasure mountains' with brilliant scientific and technological achievements!"

"More stylish school uniforms and quality school things for our dear children!"

"Let us raise the status of our country to that of a sports power at an earliest date possible! Play sports games in an offensive way, the way the anti-Japanese guerrillas did!"

Despite being one of the most isolated nations in the world, some "management speak" appeared to creep into the slogans.

North Koreans were told to adopt the philosophy of "Kimilsungism-Kimjongilism" - a reference to former leaders Kim Il-sung and Kim Jong-il, who are revered in state propaganda.

The slogans also shed light on Kim Jong-un's leadership style, with the military urged to establish his "monolithic command system more firmly throughout the army".

Music seems to be a component of the authoritarian system with workers encouraged to sing the song We are the Happiest People in the World.