The Seed Storage is a block added by Agricraft. The block takes on the texture of whatever wood was used to craft it. It can store any analyzed seeds, but only of a single seed. This seed is set by the first seed to enter the block, but can be cleared by pressing the "X" in the bottom right of the GUI once it is empty of all seeds. The Arrow buttons are used to scroll left and right one seed at the time, while the Double Arrow buttons scroll to the beginning and end.
The seeds can be sorted depending on their stats, either Strength, Gain, or Growth. The best seeds will be shown first for the given filter, followed by seeds of declining quality. The three bars underneath a seed represent Growth, Gain, and Strength in that order.