Having covered manures and compost, the next thing to look at is a fertiliser you make yourself, comfrey tea. Your own home made compost has NPK values quite similar to those of animal manure: NPK Value of Home Made Compost More information on farmyard manures NPK Value of Home Made Compost These are pretty variable according to the diet the animals have had, how long it has been rotted for etc but it gives a reasonable idea.
Let’s take a look at the N-P-K values of the most common farmyard manures. NPK Values of Common Farmyard Manures – Cow, Horse, Pig, Chicken, Sheep & Rabbit
Of course, your cow manure will supply valuable humus that the fertilisers will not. Different fertilisers will provide different percentages of various nutrients so the quantity added will depend on the npk content of the type of manure or compost you use.įor example, if you want to add 10g of nitrogen per square metre you would need to add 83g of dried blood (12% nitrogen) or 50g of sulphate of ammonia (20% nitrogen) but if you wanted to supply that nitrogen from cow manure you would need 1,660g (1.6Kg) at its average 0.6% supply of nitrogen.
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