Noweed is a woven polypropylene fabric made for weed control in nurseries, landscaping and horticulture. Helps stop weeds while allowing flow of nutrients and air.
Noweed is manufactured with a very tight weave but has micro perforations to allow water and nutrients to penetrate the fabric. If you examine Noweed against most weed control fabrics you'll see that the others are of a wider weave plus they are not micro perforated to allow nutrients to flow through. Those type of fabrics will sour the soil.
Preparation of soil is recommended prior to installation. In particular certain grasses such as couch should entirely eradicated by means of steaming.
Note: As a woven polypropylene water flow rate can be slow to permeate through the fabric, especially in very dry conditions. For commercial growing it is recommended that irrigation be drip fed at the points of opening for the plants, this will ensure that water penetrates to the roots. For accessibility to the drip system it should be installed over the top.