Most garden soils and notably organically created garden dirt won't ever require the extremity of sterilization. The significant disadvantage to this, whether or not chemically, is it also kills beneficial soil organisms. But, based on particular conditions, it might be critical. You can buy NASAA certified organic compost for the good health of your soil for the garden.
It is almost impossible to remove all weeds, seeds, diseases, nematodes, and insects. In the latest aspect of Summer, usually August or July, it is possible to increase soil temperatures above four inches deep into over 120 degrees using transparent plastic sheeting. Just till or spade mulch to the surface soil as heavy as you can get it. The mulch helps to create heat.
Then moisten the area and cover with clear plastic sheeting. Maintain the sheeting on the floor and be sure all edges are tucked carefully, covered with grime, or held down in a different manner.
This will essentially make an oven that can produce soil temperature frequently above 120 degrees. This may normally"cook" the biggest proportion of undesirable soil issues. Keep moist and covered for at least a couple of weeks.
On a lesser scale, you'll have greater achievement and potentially remove all undesirable diseases, weeds, nematodes, and insects. Putting soil in black baskets, moistening, and masking closely with clear vinyl will create soil temperatures in excess of 150-160 degrees. Keep covered for fourteen days and be sure it stays moist.
Again, remember that this also kills beneficial soil organisms. However, the tradeoff could be critical. And also you may reconstruct the construction of the soil with time with the addition of a lot of organics into the ground.