Natural products such as these generally do not have high N-P-K numbers, but offer a wealth of readily available nutrients to plants in a living soil.
I have tried many different tactics to keep the mice out of my trays, but the only thing I have found that really works consistently is reemay (row cover).
If you let the plug trays dry out when germination first occurs, you will most likely lose the whole tray.
The following are more general terms relating to plants and growing. Some are actual botanical terms and some are simply descriptive words you will likely hear in the plant trade.
The paper pot transplanter is a specialized tool in small-scale farming used for high-density plantings of cut greens, scallions and other row crops. They are generally used as a labor-saving alternative to direct seeding or transplanting by hand.
This table shows the means (mass flow, diffusion or interceptive root growth) by which nutrients are taken up through the roots.