This section is from the book "The Gardener V3", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
Trenching I find to be the greatest possible help to successful kitchen-gardening. Every bit of ground bare in winter we trench, not only turning over the soil a couple of spits in depth, but shovelling the loose soil over as well and digging up the bottom of the trench. Decayed rubbish may be got rid of by being put in the bottom of the trenches, and in all cases a heavy dressing of dung is of advantage. You can take crop after crop without any trouble off land which is kept well trenched and manured. R. P. B.