1. A method for producing a combined phosphate fertilizer and soil conditioner without employing a mineral acid, which consists essentially of the steps of:

(a) grinding a moist, acidic, organic waste material having a pH less than 5, a water content of at least 40% and lower calcium and phosphorous contents than the calcium and phosphorous contents of phosphate rock;

(b) heating the acidic, organic waste material ground during step (a) to a temperature of 40° to 120° C. and at a pressure of 16 to 22 bar;

(c) grinding phosphate rock to a particle size of 0.02 to 1 mm;

(d) heating the phosphate rock ground during step (c) to a temperature of 50 to 800° C.;

(e) combining the ground, acidic, organic waste material obtained during step (b) as the sole acidic reactant with the ground phosphate rock obtained during step (d) at a pressure of 20 to 55 bar to permit the ground, acidic, organic waste material and the ground phosphate rock to collide, to cause disintegration of the phosphate rock; and

(f) cooling the mixture obtained during step (e) to 20° to 40° C. to obtain the desired product which contains almost all nutrient elements of phosphate rock.

2. A method for producing combined phophorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is bark waste.

3. A method for producing combined phophorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is peat or peat mud.

4. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is waste fibre from a cellulose production plant.

5. A method for producing combined phosohorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is sawdust.

6. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is the solid component of communal sewage.

7. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the amount of water-soluble phosphorus in the fertilizer is regulated by the pH of the reagent mass.

8. A method for producing combined phosphorous fertilizer and soil conditioner according to claim 1, in which the amount of water-soluble phosphorus in the fertilizer is regulated by calcium and phosphorus content of the reagent mass.

9. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1 which the amount of water-soluble phosphorus in the fertilizer is regulated by the reaction temperature.

10. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the amount of water-soluble phosphorus in the fertilizer is regulated by the duration of the reaction.

11. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the amount of water-soluble phosphorus in the fertilizer is regulated by the weight ratio of the fresh organic mass and the dry phosphate rock.