Ph Up And Down, Other then this, Lemon Juice To Lower PH cant think of the organic way to increase But nutes such as Rhymozonic will increase ph and Liquid Silicon
the stuff for hydroponics will work for soil, if it's the soil it's self that is the wrong ph it will take alot of time , if it's the feeds you want to change the ph of then it's easy just use up or down depending on what you need