Nutrients such as Potash, phosphate, and nitrates can not be created out of thin air. There are a variety of sources that satisfy NOFA if that is your goal. The three majors can be sourced from animal manure but the concentration and therefore the practicality of sourcing those nutrients from manure vary. My understanding that there are sources of Potash and Phosphate that are mined from the earth that satisfy organic requirements. If you are merely engaged in some sort of subsistence system you can use a rotation involving legumes such as clovers and/or alfalfa to build up the level of organic nitrate to be used for future crops. Whether they can be built up in the short term to eliminate commercial fertilizer to grow sufficient production is another question altogether.
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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