Argiculture and Forestry Purity - current state

[AndieRan]

I have played for a few weeks, managed to acquire basic skills including forestry, mining and agricultural ones, and now I started to try to raise purity of my goods. To my dismay, I am unable to find a definitive guide on how purity works for agriculture or forestry, therefore I am mostly planting in vain, not seeing any significant advances and not understanding what I see. Wiki is mostly silent on this topic, as Salem Wiki: Agriculture and Salem Wiki: Forestry does not speak about purity at all, while Salem Wiki: Compost contains some information, but it is hard to see if it is up to date.

When browsing and searching a forum, one can find lot of topics regarding how purity works, but it is hard to see which of them are obsolete by now and which are still valid. There is http://forum.salemthegame.com/viewtopic.php?f=2&t=5685 which seems like it should provide definitive answers, but it is very long and the information presented there is unclear or conflicting sometimes.

Regarding Salem Wiki: Agriculture:

It seems crop purity is influenced by fertilizers and seed, however it is not clear to me if humus used before replanting the fields counts.

Regarding Salem Wiki: Forestry:

It seems new tree purity is affected by a cutting purity, a gardening pot purity, humus purity, it is not clear to me if water purity is affecting it as well. Furthermore, it is not clear what affects gardening pot purity. Clay which is it made from only?

Regarding Salem Wiki: Compost:

It seems humus is affected by the purity of the materials used to build the compost, but I am not sure if the purity of the things (grass, weeds, crops) inserted into the compost affect it as well?

If anyone can provide description here, how purity in agriculture and forestry works now (preferably with links to evidence or sources), I will gladly to rewrite any solid and recent information into the Wiki.

[Kandarim]

The main point to keep in your mind that this is all still subject to a lot of change (pending the changes on gluttony system first). As such, most of us feel it isn't worth it updating the wiki until we get that major bunch of updates (which we've been waiting for a while now :p)

I'll try to answer your questions directly concerning the current state of the game:

Regarding Salem Wiki: Agriculture:

It seems crop purity is influenced by fertilizers and seed, however it is not clear to me if humus used before replanting the fields counts.

Fertilizers do not influence this, but humus used for preparing the field does, in conjunction with the seeds. The humus will need to be of the same element as the seeds to get a good result. even with 80% humus and seeds you're unlikely to get a harvest exceeding 70% purity. Since you asking these questions implies you are not a long-time player, you are unlikely to have access to these. In any case, match your humus and your seeds for pure results. On lower purities, this is much more forgiving: I regularily get 10% harvests from 8% seeds and 7% humus (personal results).

Regarding Salem Wiki: Forestry:

It seems new tree purity is affected by a cutting purity, a gardening pot purity, humus purity, it is not clear to me if water purity is affecting it as well. Furthermore, it is not clear what affects gardening pot purity. Clay which is it made from only?

This answer is a list of short sentences :p
Gardening pot purity is a mix from the clay, the lime and the granite.
Clay purity is either the purity of dug up clay, or the purity of the milk of lime when making it from dirt.
Purity of milk of lime is the purity of the water which you put the lime in, the lime for making milk of lime does not influence the purity of the milk.
Lime purity comes from the quarry or from random foraging similar to other forageables.
Granite purity comes from foraging similar to other forageables.
The purity of the saplings is a mix of the gardening pot, the humus, the water and the cutting. Match them all for best effects.

Regarding Salem Wiki: Compost:

It seems humus is affected by the purity of the materials used to build the compost, but I am not sure if the purity of the things (grass, weeds, crops) inserted into the compost affect it as well?

Humus is only affected by the purity of the boards used when building the bins, and the purity of the worms currently in the bins, but the influence of worm efficiency is unknown to me (i just put it at 100% all the time). It is assumed that bin purity is currently also influenced by the nails and woodplugs (because the output quality of the humus is invariably lower than the boards' purity, even with 100% worms) but as these have no visible purity yet, there is little that can be done.

The purity of the things inserted into the bin only affect the speed of generation (again, I have no hard numbers on this because I never waste pure stuff in the bins).

I believe I answered all your questions. I'm afraid asking for evidence is a little optimistic: the dev's believe in security through obfuscation, it seems. In any case, they have released near to nothing definite on the mechanics, and almost all known mechanics are the result of player experience.

[AndieRan]

Great, sounds quite complete, thanks a lot.

You did not mention board purity (for the compost bin) is the purity of the tree it comes from (it does not depend on the equipment it was processed with).

The last thing I am missing: What does the water purity depend on?

[DarkNacht]

What does the water purity depend on?

Different areas of water have different purity.

[alloin]

short answer: don't be arsed until the next update, it will probably change again (if there is ever gonna be one)

[Kandarim]

short answer: don't be arsed until the next update, it will probably change again (if there is ever gonna be one)

[wiatrak]

Hello there!

viewtopic.php?f=5&t=5689

Check this thread we did a lot of tests long time ago.

Afair humus purity = 0.9*board purity + 0.1*worm purity(+ efficiency stuff) i'd say.

100% worms with 0% bin resulted in 1% humus
100% worms with 3% bin resulted in 4% humus

[Snowpig]

This formula cannot be correct. I have a 1%-bin which is stuffed with 30%+ purity worms and as soon as those pesky 0% (25/25/25/25)-worms appear therem the purity of my compost goes up.

[wiatrak]

ah forgot to notice, pythons. And its important

[Kandarim]

ah forgot to notice, pythons. And its important

also the single fact that you seem to enforce your argument with purity percentages rather than elemental values makes it invalid, in my mind.