Experiment:
- They're examining the growth of the herbs they put into clay pots from several chapters ago, with the ones in the small garden, comparing them with the plants in the larger fields.
- They put fertilizer into both of the garden and the pots.
- Results: some plants in the fields are doing absurdly well growing huge, slow for the garden, and even slower than normal in the pots (slower than expected when going by the gardening book)
- Question: Why is it not the same case for all of them, when they were all given fertilizer?
- Information we know: plants in the other world grow absurdly well/large with fertilizer from Kazura's world. By that logic, the weeds should be growing huge as well, by stealing the nutrients. But they're not. Why?
Kazura's theory:
- The nutrients in the pots are already all gone, and therefore cannot give anymore to anything growing in it, or at least very little of it.
- Why is it gone? Because all the huge weeds were already pulled out by Valetta's villager friends and acquaintances who pitched in with a helping hand to their garden (so Valetta didn't see or know of the big weeds) during the interval between their trip together in Istria when they themselves couldn't look after them.
- What that means is; the villagers helping out were few and far between, and as such, could not pull all the weeds out as quickly enough, as soon as they sprouted, before the weeds could steal all the nutrients in the pots by taking root.
- When Valetta returned to take care of the garden as usual, where she can keep a much closer eye on them, she only noticed the newer small weeds growing, of which she immediately pulled them out before they could grow too big.
-Diagram: the crops get their nutrients from deeper underground than the weeds do, before the weeds can take proper root, because the villagers pull out weeds more frequently in the fields, as opposed to only sometimes stopping by Valetta's garden.
- Valetta continued her usual routine, watering the plants frequently, evenly distributing the nutrients in the pot, thereby only exasperating the situation where even new small weeds could get to the nutrients from the bottom of the pot, from the top of the soil.
Valetta's worry and Kazura's concern:
- No matter how much fertilizer they give, plants from her world, the weeds in particularly, will continuously suck up all the nutrients until there's absolutely nothing left, like a plant-parasite.
- Kazura has the same concern, but doesn't want to jump to conclusions just yet.
- Nutritional value is still the same, just the size difference is not. It's like a name-brand paper towel that can soak up more water 4x better than an off-brand version. The one that soaks up more out-competes the other.
Theory continued (with anecdotes implied from Volume 1):
- Plants/leaves should naturally wither and decompose into compost/humus. But what if it didn't, because all the nutrients is being taken away by other more aggressive flora/fauna?
- If this happens over and over again, eventually, all the nutrients will all be devoid of nutrition.
- If this cycle repeats, then even if they used humus from withered plants/leaves in the forest to replenish the fields, then there would be no point in fertilizer being conceived, because it won't help them if there's little to no nutrients left there in the humus anymore, just filler.
- And they'll have a periodic famine/drought, that's only exasperated by lack of rain for prolonged periods of time. And once it rains frequently again, all the nutrients from the mountains and surrounding land will reach an equilibrium, restoring the land back to normal.
- They did occasionally use animal bones as a religious ritual of sorts to the gods on seldom occasions, which normally would have added some nutrients like calcium back into the soil, but they didn't go into detail whether they crushed or burned them first to make ash, which may or may not have helped the soil at the time even if it was unintentional/accidental.
What they decided on now:
-They have one pot left of peppermint which happened to still look okay, likely because of luck that a weed's seed didn't land in it as much when carried by the wind.
-Valetta will now isolate the pot in the house to prevent any more free-flying weeds going into the pot and taking root, testing to see if there's any new changes when she adds new fertilizer back in, to compare with the other pots.
- If the peppermint pot grows bigger from the new fertilizer, that will be a good thing, but at the same time, confirm that the weeds are indeed taking the nutrients from the other pots.
- If there's no change, then there's a chance the weeds aren't land-devastating plants worse than invasive species, that may require something like herbicides to combat against.