This section is from the book "The Gardener V1", 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.
The aim of all good gardeners is to extend the duration of crops, whether of fruit or vegetables, over as great a period as possible, various schemes being resorted to as circumstances may suggest. A quarter for one thing and a quarter for another is all very well in its way; but it is not the most scientifically managed gardens that yield the most satisfactory results. Much scheming is absolutely necessary, especially in small gardens. According to my experience, there are but few gardens where the crops of many kinds would not be found most profitable if distributed in patches; and I for one prefer to sacrifice order and strict rotation in order to maintain an unbroken supply without risking an undesirable glut. North borders prove especially useful, but unfortunately they are oftentimes small in proportion to the size of the gardens, as, by their proper management, much labour to attain the same ends is saved.