I'm having a lot of problems with this version; is this because it is still in alpha and is a work in progress or are these actual bugs? Here are some of my issues:

1. Sprinklers do nothing. They do not irrigate farmland nor do they increase crop growth. I have tried this while running only Agricraft and with the sprinklers placed at varying heights.
2. Weeds are very bugged. Using a rake can drop an item that cannot be picked up (but is affected by magnets?). Using a weed seed can cause weeds to appear and disappear instantly, sometimes fully mature.
3. Missing recipes for sugar cane and cactus seeds, and mushroom spores. And shouldn't all resource plants need ores underneath? Fixed.

Other than these issues, the mod seems to cause the game to slow down, sometimes to a dead stop, and overall, it just feels kind of wonky.

Not sure about the sprinkler part, but the rest of your issues are already known. The item drop from weed is a desync issue and the sugar cane, cactjs, ect. seeds was yet to be implemented as drops properly

The de-sync is a known issue. As such I am making a new, concise issue for the sprinklers and closing this one.