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Farmyard manure also contains plant material (often straw), which has been used as bedding for animals and has absorbed the feces and urine. Agricultural manure in liquid form, known as slurry , is produced by more intensive livestock rearing systems where concrete or slats are used instead of straw bedding.
Animal-free farming may use organic or non-organic farming methods. However, most detailed discussions of animal-free agriculture currently focus on animal-free organic variants. [4] In the European Union, farmers have a financial incentive to use manure instead of animal-free fertilisers, since manure is subsidised.
The ratio of carbon to nitrogen in a plant is a crucial factor to consider, since it will impact the nutrient content of the soil and may starve a crop of nitrogen, if the incorrect plants are used to make green manure. The ratio of carbon to nitrogen will differ from species to species, and depending upon the age of the plant.
It is an excellent source of humus, although much of its nitrogen content will have been used up by the composting and growing mushrooms. It remains, however, a good source of general nutrients (1-2% N , 0.2% P , 1.3% K plus a full range of trace elements ), as well as a useful soil conditioner . [ 1 ]
Liquid plant manures are fermented extracts of plant material that are used primarily as fertilizers, but also for pest control, plant strengthening and other phytosanitary purposes. The best known is nettle water, usually made from stinging nettles. Other well-known types are made from comfrey or horsetail.
It may be applied to bare soil or around existing plants. Mulches of manure and compost will be incorporated naturally into the soil by the activity of worms and other organisms. The process is used both in commercial crop production and in gardening, and when applied correctly, can improve soil productivity. [1]