40 



V. Conclusions from the Results of the Trials 



The results of trials to fix the appropriate time of manuring for the 4 

 principal nitrogenous manures (ammonium sulphate, Chili saltpetre, rape- 

 seed cake, night soil) with a sufficient amount of potash and phosphoric 

 acids to Sugi and Hinoki seedlings grown on the loamy soil, rich in 

 humus, of the nursery in the Forest Experiment Station lead to the 

 following conclusions : — 



(1) The manures above-mentioned show less efficacy even though 

 they are applied for many times, unless applied at the proper times. 



(2) The efficacy of base manures was especially noted both for Sugi 

 and Hinoki. This is partly due to the fact that the manure so applied is 

 accessible for the seedlings from the beginning, and partly to the 

 perfect mixing of the manure with the soil so that the tender 

 rootlets of the young plants can take the nutrient in the soil. The best 

 example of the base manure both for Sugi and Hinoki is observable with 

 No. 3 for Ammonium sulphate. Chili saltpetre, Rape-seed cake where 1/3 

 of the entire quantity was given as base manure in a few days 

 previous to the planting of seedlings while the rest was given as the 

 top-dressings in two times, viz., in the middle of September and early in 

 May, next year. 



