About
 Humus is primarily used to Plant crops in  Tilled Fields and  Gardening Pots.
Composting
Composters, when filled with Organic Material, will generate 1x Humus and possibly a  Common Earthworm or rarely an  Earthworm Python every 2 hours. The Purity of the Humus will be affected by Worm Purity and your Composter's Worm Efficiency. Each Common Earthworm will raise your Worm Efficiency by 4% and each Earthworm Python 16%. Composters have a 50 point fill capacity; the bar seen when opening a composter shows what percent that bar is filled. To fill your composter, select some Organic Material and right-click it onto your composter.
Worm and Humus Purity
Common Earthworms and Earthworm Pythons can have their Purity raised by allowing them to eat  Any Plant with a higher Purity than their own. To do this place a Worm in a Container and place your pure Any Plants directly next to, above, or below the Worm. After a few hours the Worm will eat one of the Plants and take 10% of the difference between the Plant's Purity and the Worm's Purity. Additionally Common Earthworms found when Rummaging an  Abandoned Bird's Nest will take on the Purity of the  Tree it came from. Worms in turn pass their Purity to the Humus they produce in a  Compost Bin based on the average Purity of ALL the Worms inside the Compost Bin and its Worm Efficiency. For this reason it is recommended you regularly check on your Compost Bin and remove any unwanted Worms that spawn as they will lower your average Purity. Humus is one of three components for Gardening Purity.
Gardening Purity
Three factors influence Gardening Purity. The Purity of the Humus, the Purity of the Plant, and the Purity of the Gardening Pot. The Harvested Plant will be the average Purity of these three factors weighted towards the Humus. The formula is: Resulting Plant = ((Humus*2)+Pot+Initial Plant)/4. Any time the Resulting Plant's Purity is higher than the Gardening Pot's, the Gardening Pot's Purity will permanently increase by up to 2.56%. You may check your Gardening Pot's Purity by right-clicking it.
Fertilizer
Humus is also a  Fertilizer which will add to a Tilled Field's Influence, Speed and Plenty.
Fertilizer gain per usage step:
| Step |
|
Plenty |
Speed |
Influence |
|
| 01: |
|
25% |
50% |
29% |
|
| 02: |
|
12% |
25% |
16% |
|
| 03: |
|
8% |
16% |
12% |
|
| 04: |
|
6% |
12% |
10% |
|
| 05: |
|
5% |
10% |
9% |
|
| 06: |
|
4% |
8% |
8% |
|
| 07: |
|
3% |
7% |
7% |
|
| 08: |
|
3% |
6% |
7% |
|
| 09: |
|
2% |
5% |
6% |
|
| 10: |
|
2% |
5% |
6% |
|
| TOTAL IN 10 USES: 70% Plenty, 144% Speed, 110% Influence
|
NOTE: Values for Influence are factored with the bonus from having learned Three-field System.
| 
