On the decay of these structures the phosphates<span> are returned to the inorganic world, thus completing the cycle.</span><span>
</span>Of mineral constituents, whether used alone or in mixture with nitrogenous manures, phosphates<span> are much more effective than mixtures of salts of potash, soda and magnesia.</span>
Many of the above include descriptions of mineral phosphates<span> in other parts of the world.</span><span> </span>
