>> Well then all I have to do is make a paper grid and note each time I bury it as to where. Easier than what I am doing now.
A half-and-half approach may be even easier.
Keep a small compost heap, only big enough to hold 1-2 weeks of kitchen refuse. If you have enough brown leaves or sawdust or clippings to cover the kitchen waste and keep it out of sight, even better. Keep a plstic-handled pitchfork or old shovel near the heap.
Each time you wnat to get the watse out of the kitchen, drop it on the heap and cover with some leaves.
When convenient, every few weeks, bury the heap in a shallow trench in the garden, and you only have to dig a trench or mark your map every few weeks.
Or tie a string to two pegs, and move the string to show how far the trenches have advanced.