1. Surely this is due to the superphosphate bone meal.

2. Cattle manure and calcium superphosphate were main polluting material.

3. However, the Ca-Mg-P was slightly inferior to calcium superphosphate, but no significant difference was showed.

4. An analytical study is made on the single superphosphate process system.

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5. We make superphosphate by reacting rock phosphate with sulphuric acid.

6. A kind of new typer mixing reacter with an injection tube and a baffled chamber for producing calcium superphosphate was introduced.

7. Analyzed the causes effect factors on slurry capacity and quality in the production of simple calcium superphosphate by wet-process, loading capacity and graduation of bowl mill also are discussed.

8. The discharges of N and P vary with different fertilizer applications and urea and superphosphate application can reduce the N and P loss and heighten the cabbage yield.

9. Test and application of active and porous agent (APA) in the production of single superphosphate were introduced.

10. It is practically insoluble in water and only very slowly soluble in diluted acids, so it is largely converted for fertilizing purposes into superphosphate.

11. Linsuanyian , Linsuaneran, of Hefei, the mixed fat, calcium superphosphate, salt fertilization manufacture, marketing.

12. The water extraction process of iron and aluminum oxides from superphosphate is experimented and studied by orthogonal designing method and the kinds of additive and extraction conditions are sieved.

13. In this paper, quick determination of the content of the effective phosphorus in the new calcium superphosphate by means of potentiometric titration has been researched.

14. Sulfuric acid, phosphoric acid, aluminum sulphate, calcium sulphate, calcium chloride and superphosphate were selected as chemical amendments for co-composting of pig manure and straw.

15. According to soil fertility and soil structure in the loess plateau, the experiment of fertilizer amount was carried out with ammonium nitrate and calcium superphosphate.

16. The mechanism was Studed by m SPectroscopy that paper making Waste Water and phosphatic manure Waste Water control calcium Superphosphate moisture.

17. Effect of active addition agent and ultrasonic on reaction kinetics of phosphate rock and sulfuric acid in the single superphosphate ( SSP ) process are studied.

18. It could be expected that nucleoprotamine modified calcium phosphate could be a better transfect agent as compared to coprecipitated superphosphate.

19. In this paper, a new type of mixing reaction unit composed of injector and baffled chamber, which is used in production of calcium superphosphate.

20. Some superintendents prefer a starter with some slow-release N component. Try to avoid using a superphosphate-based P-source, as superphosphate dispenses phosphate slower than seedlings require.

21. Through a series of laboratory and small pilot scale continuous experiments, the feasibility of urea - calcium superphosphate production with Yichang phosphorous ore has been proved .

22. One-step defluorination technology in the preparation of feed-grade dicalcium Phosphate from triple superphosphate was introduced.