Johnny Appleseed
"Johnny Appleseed" is a song by Bing Crosby. It appeared on the 1957 LP A Christmas Story.

Part of the song was used in the  episode , where it was overlaid on scenes of the tribble population aboard the  first starting to proliferate. 

The lyrics heard in the episode are as follows:
They call me Johnny Appleseed
I've come to plant my seeds indeed
I've come to plant them in the ground
They'll blossom soon for miles around

Here's a seed, plant it deep
Seeds can earn their board and keep
Here's a seed, take good care
Soon you'll find an orchard there

An apple tree's a sheer delight
In spring it's like a cloud of white
In summer it's a cloud of green
Its shade will make you feel serene

Here's a seed, take good care
Soon you'll find an orchard there
Star Trek music