Although very damaging to your turf, soil compaction can be corrected. First, you must increase the flow of oxygen, water and nutrients that have been deprived from the soil by aerating. Core aerate the soil as deep as the compaction occurs, use a tine diameter from ¼ to ¾ inches and 2-6 inches apart is recommended.
Adding compost to your soil is one of the best ways to combat compaction. As organic materials decompose, they attract soil organisms that naturally aerate the soil through creation of pore space. Implementing a crop rotation can help avoid compaction. Use large root crops to break up compacted soil.
When the soil is weak at depth, compaction can result from vehicle traffic, and it is generally harder to reverse than compaction at the surface. Some soils may naturally return after tillage to a compacted state that will significantly impede root growth.
Garden Fork: A garden fork can be used to aerate and break up compacted soil. Insert the fork into the soil and rock it back and forth to loosen it.
Digging bar: A must-have for breaking through compacted clay. It provides leverage to tackle tough soil layers. Spade and shovel: Your go-to tools for lifting clay chunks. Use the spade for precise cutting and the shovel for moving large amounts of soil.
Chopstick: For smaller areas, gently loosen the soil around plant roots with a chopstick by poking it into the soil a few times. Don't fiddle with the chopstick as you insert it, as it might break fragile root structures, but if you snap a few roots while you're working, do not fret, as they will grow back.
The force of raindrops mechanically compacts surface dirt, creating a soil crust that is up to ½-inch deep. This layer impedes drainage and makes it hard for seedlings to emerge from soil. By applying low-pressure water near the ground's surface, the soil compacts evenly.
For large fill areas, rolling is the fastest, most efficient compaction method. Hand-held compactors can be used in smaller areas and for places that larger mobile equipment can't reach. For granular soils, vibrating plate compactors work best. Rammers or impact type machines are used for cohesive soils.
Alleviate compaction by adding organic matter to the surface, in the form of mulch. The mulch will break down and organic matter will, slowly but surely, fall into the soil below.
Artificial drainage can help increase the number of trafficable days on poorly drained soil. Keep axle loads below 10 tons. Subsoil compaction is caused by axle load and is basically permanent. To avoid subsoil compaction, keep axle loads below 10 tons per axle--preferably below 6 tons per axle.
Once a year or even twice a year are usually adequate for clay soils, depending on how compacted they are. Sandier or loam soils may not need to be aerated as much, due to porous nature which allows for better oxygen flow to the roots.
A compacted soil has a reduced rate of both water infiltration and drainage. This happens because large pores more effectively move water downward through the soil than smaller pores. In addition, the exchange of gases slows down in compacted soils, causing an increase in the likelihood of aeration-related problems.
Aerating your soil will help to break up compacted soils and improve drainage. This can be done with a garden fork or an aeration machine. Surface drainage can be improved by adding mulch, rocks, or gravel to problem areas. A French drain is a type of drainage system that can be used to collect and redirect water.
Keep foot and vehicle traffic to a minimum. Loosening compacted soil can be done a number of ways. For larger areas, like lawns, you can use an aerator. These machines will either remove plugs of soil from the ground or will puncture the ground and give the soil room to decompress.
Gypsum - improves aeration of compacted soil, helping it drain more efficiently. Perlite - improves aeration and drainage. Vermiculite - improves moisture retention and aeration.
On the other hand, one drawback of core aeration is that it can be invasive for your lawn. Because professionals mechanically pull up plugs of soil during this process, it can leave behind holes in the ground where those plugs were removed. As a result, it can stress it out.
A quick and easy way to test for soil compaction is to use a wire flag as the probe (Figure 5). Hold the wire at the flag end and push the wire part of the flag into the soil until you can no longer get it further in the ground without the wire bending.
Over time, soil that has been loosened or disturbed will settle and compact down naturally.
A harrow is a farm implement used to level and smooth soil, break up clumps, and control weed growth. It can be pulled by a tractor and is often used in conjunction with plowing and tilling to prepare fields for planting crops.
Using gypsum for soil can improve soil structure, decrease soil compaction, decrease acidity, prevent water run-off, increase airflow and dislodge salt. It is a source of calcium and sulfur, which are essential for healthy plant growth.