From KIM CHASE
Chase Farm, Helena, Montana
We do have a roto-tiller attachment for our lawn tractor, which we used to use and will continue to use when preparing brand new ground for garden. But it turns out that roto-tilling every year is not optimal in several ways.
- It ruins soil structure. It pulverizes the soils, breaks up soil aggregates, breaks up macropores (large spaces) in the soil and destroys all the tunnels your worms have worked so hard to build. All this space in your soil improves drainage, facilitates movement of nutrients and water.
- It causes compaction. Once those soils aggregates are broken up and the soil is reduced to its particles, the soil is nice and fluffy. But since there is no real structure, the soil will settle into a more compacted state.
- And then there is the problem of tiller-pan. The weight and action of the tiller causes a compacted layer just below where the tines reach, further decreasing soil drainage and the ability of roots to penetrate the soil.
- It inverts your soil. Tilling turns your soil right upside down. The delicate ecology of soil develops as it does for a reason. Certain helpful bacteria, fungi, and earthworms were at a certain depth in the soil because it had the right moisture and aeration conditions. Turn the soil upside down and you will disrupt this ecology for at least a while.
- It plants weed seeds for you. Ugh.