This is how I did mine ^^Here's a trick for that. This is how I do my carrots.
I prepare the bed as flat as possible. Then I distribute my soaker hoses and pat them into the soil a bit with the back of a shovel.
First trick: I mix the carrot seeds with sand. Mix it up as evenly as you can. Then lightly sprinkle the sand over the area. You can see your evenness of sprinkling if the sand is a different color from the actual soil. You don't need a lot of sand. Maybe 10x the volume of sand as the volume of seeds. I spread it as evenly as possible, and my carrot seeds are likewise evenly spread. And because I put the hose down first, seeds are not going to sprout under the hoses.
Pat this lightly with the back of a shovel. The entire plot. This presses the seeds into the soil.
Next I sprinkle a quarter inch (or so) of fine soil over the entire area. It doesn't take much. Essentially I just sprinkle until I can't see any of the sand.
Pat again. Then soak with a fine spray.
Then I sprinkle a light (very light) layer of fresh grass clippings. This helps retain moisture. Carrots take a long time to germinate and it's hard to keep the soil moist for that long -- especially in a dry climate like Colorado.
Finally (and this is the real secret) I cover the plot with a piece of old carpet. (I lay out the plot to fit beneath whatever carpet I have handy. Having a relative in the carpet business keeps me well supplied with old tear-outs.) I place it pile-side-down. I think it really doesn't matter, but to me, the pile side up would wick away more water to evaporation. Then soak the carpet. (I also place a few pieces of 2x4 or rocks to keep wind from blowing it off.)
This pretty much keeps the soil moist until the carrots sprout. Even in Colorado. But if I notice the soil underneath drying out, I soak the carpet again.
After a week or so, start checking for sprouting. The carrot variety I use actually takes 14 days (and 21 if I plant really early.) You just have to lift up one corner when checking for sprouts. They'll all come up pretty evenly. (This is also when you check to see if the soil is drying out.) At first sign of sprouts, remove the carpet. Most of the grass clippings will have emaciated to nothing.
Voila! You have a bed of well-dispersed, well-germinated carrots!
From there, I try to sprinkle very light applications of fresh clippings EACH DAY if possible. By "very light" I mean not much more than one grass blade's thickness each time. It's not enough to smother anything, and the carrots easily keep growing through the successive layers. But soon I have a nice mat of grass clippings between all the carrots. It results in very few weeds, and soon the carrot tops all grow together to create their own "mulch". Eventually the tops are so think that new grass clippings just stay on top of them. At that point I back off frequent applications. When the clippings start hanging on the tops, I just swish my hand around the tops and it falls through. (And continues to fall through as the clippings dry out.
Here is one of my carrot patches:
Mine are all orange
http://www.rareseeds.com/oxheart-car/
http://www.rareseeds.com/danvers-126-half-long-carrot/?F_Keyword=Danvers
These are what I have ^^
