shibui wrote: Where did that info come from treeman?
Kevin Handreck
Cow...................N 0.2-2.7 P 0.1-0.6 K 0.06-2.1
Blood and bone.....N 4.5-6 P 5-7 K 0-2
Poultry pellets......N 3-4 P 1.3-3.6 K 1.2-2
Now, as we know, it is recommended to add chicken pellets (DL) every 2 weeks. It is easily leached. Cow manure is even more easily leached of it's nutrients after just a few waterings. It may contain almost no K (for example) if left in the rain for a while before being collected.
Cakes made from nutrient dense ingredients like soya and blood and bone last at least a month and are still dissolving after 6 weeks or more. What we are after is a high quality slow realease form of organic fertilizer. You can add whatever you like but cow manure should really be kept for digging into the ground. Particularly if you cannot be sure of it's nutrient content without analysis.
Also, a teaspoon of soybean would have the same nutrient load as a tablespoon or more of cow manure due to it's density.
so soy bean meal has more N, a fraction more P but less K.
Yes. This is why I boost K (and others) with Kelp extract (seasol etc applied separately) and regular liquid feeding with is usually very high in K