Add nitrate field fermentation for TFC, adding an easy way to get saltpeter.
Nitrate Field Fermentation:
All four horizontal sides must be dirt, nitrate fields, or mature nitrate soil blocks. The block above must be air, and that air block must not see the sky. When the conditions are maintained, the field matures into nitrate soil after 10 TFC days.
Leaves and Sticks: heat them to get large amounts of wood ash.
给群峦传说加入了堆硝，方便获得硝酸钾的简单方法。
硝田发酵:
四个水平相邻方块必须为泥土、硝田或成熟硝土块。上方一格必须为空气，且这格空气不能露天。持续满足条件时，硝田会在 10 个群峦天后成熟为硝土块。
枯枝败叶：加热得到大量草木灰
