dan1109 wrote: ↑Fri Jan 07, 2022 1:56 am
Okay. I will use the terms "grass roller" and "Soil roller." I agree; it is kind of confusing.
I did some testing on my test plots, similar method to the herbicide and weeding tests I posted elsewhere. I made 4 identical plots, each exactly 1 hectare, with no plowing, lime, fertilizer, rolling, or mulching beforehand. I painted to get rid of the grass around the fields.
One field I mulched before seeding grass. Another I seeded and soil rolled the same month. Another I limed and seeded. Another I subsoiled and seeded. I did short cuts, since this is just a test and I wanted to fit each crop in one loading wagon. I've done two cuts so far, and they confirm that plowing and liming have no effect, the initial soil rolling effect remained for the second cut. Mulching had an effect only for the first harvest. Here's the data. Bonus percentage is in parentheses. It's based on 26,240 ltr/HA base yield for a short cut.
Mulched: 40,056 ltr (52.65%)/45884 ltr (74.86%)
Soil rolled: 40058 ltr (52.66%)/46661 ltr (77.56%)
Limed: 39325 ltr (49.87%)/45886 ltr (74.87%)
Plowed: 39333 ltr (49.90%)/45886 ltr (74.87%)
The numbers don't work out perfectly. I have done tests with small grains that do work out perfectly, but there seems to be something about grass where you get a little bit of variation. Regardless, you can see that only mulching and soil rolling had an effect on the first crop. Plowing and liming did nothing. You always get the plowing, liming, and weeding bonuses on grass (15%+15%+20%=50%). The jump in the second crop is due, of course, to the free fertilization, which was apparently 25%. Only the field that had previously been soil rolled received 2.5% above the other three. According to the soil map, the soil rolled state remained after the second cut as well. I am assuming this bonus remains until the soil is tilled again. It's interesting that this has not occurred for you.
I have not used a soil roller on grass after the initial planting. Out of curiosity, I tried soil rolling grass on my test plots after harvesting, and it did not fertilize. In my regular save game, I grass roll after every harvest. And yes, I do this the same month.
One last thing: the only month I have observed where grass rolling affects growth is November. If you mow in November, and do not grass roll, it will not advance a stage in December, but if you grass roll, it will. In my regular save, I mow full cuts in April, July, and October. However, It seems that you could also get full cuts in May, August, and November as long as you grass roll after you cut in November. Those who claim to cut five times a year probably are, but it's only 2/3 cut. I agree with you; I don't see this as worth it. You do everything two more times to get only 1/3 extra harvest.
There’s no place like utopia.