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When I started out i found this video very helpful...http://www.gardenersworld.com/how-to/projects/crop-rotation/Duke :)
1. Podded plants fix nitrogen in the soil on their roots, so follow them with2. Brassicas, which have high nitrogen requirements, and might want lime added to the soil3. "Roots", which include potatoes, carrots, parsnips and beetroot. Most of these are dense, which helps to kill off weeds, so follow them with4. Alliums, which can be a weeding problem, and might also need lime, so adding lime can be done every second year.
Quote1. Podded plants fix nitrogen in the soil on their roots, so follow them with2. Brassicas, which have high nitrogen requirements, and might want lime added to the soil3. "Roots", which include potatoes, carrots, parsnips and beetroot. Most of these are dense, which helps to kill off weeds, so follow them with4. Alliums, which can be a weeding problem, and might also need lime, so adding lime can be done every second year.1. while it is generally accepted by all that the nodules on legume roots fix nitrogen, while the plant is growing this nitrogen will be taken up by the plant as well as any available from the manure. No significant nitrogen will be given out to the soil compared to the manure so moving them around the plot gives no advantage and it is the gardener's job to make sure the plant is well fed. They might as well stay in the same spot year on year.2. Because brassicas have high nitrogen requirements and may require lime it makes sense to me to keep them in the cabbage patch.3. Potatoes, carrots, parsnips and beetroot require very different growing conditions to each other for best results. Potatoes are heavy feeders but carrots and parsnips do not like manure. Beetroot likes salt. Keep them separate.4. "Alliums, which can be a weeding problem"? I think the RHS in its infinite wisdom is suggesting here that weeds don't grow amongst other crops. Leave enough room between plants for the hoe and the problem it is sol ved.Shall we have an argument?