— 35 — 



% 

 Lime (CaO) 0.746 



Magnesia (MgO) 1.729 



Potash (KjO) 0.026 



Soda (Na^O) 0.365 



Phosphoric acid (P2O5) 0.069 



Sulphuric acid (SO,) 0.183 



(2) Apparatus used for the Trial: — 70 bottomless zinc cylinders 

 having a diam. of 92.4 cm, corresponding to a surface of about 1/15000 

 hectare were buried in the field. The top of the cylinders were raised 3 cm 

 above the surface of the ground ; in the bottom, yellow subsoil was spread 

 uniformly, and upon it the soil to be tried was put to the depth of 70 cm. 



(3) Seedlings used for the Trial: — Fully one year old Sugi seedlings 

 weighing 1.4-1.5 gram apiece, and Hinoki seedlings weighing 0.5 apiece of 

 uniform size and growth were taken from the beds at the Station and were 

 planted 12. cm apart from each other at the rate of 32 plants in each cylinder. 



(4) Fertilizers used: — The Fertilizers used for the trial consisted 

 of ammonium sulphate, Chili saltpetre, rape-seed cake and night soil as 

 nitrogenous manures, to which the necessary quantities of sodium phosphate 

 and potassium sulphate were mixed to make up the deficiency of phosphoric 

 acid and potash respectively. Thus, the total quantity of nitrogen, phosporic 

 acid and potash comes up to 112.5 Kg. per hectar or 7.5 grams per cylinder. 



The ammonium sulphate used was that common in the market, having 



20.2%. of N. 



Chili Saltpetre: — The ordinary commercial article containing 15.5% 



of N. 



Rape-seed Cake: — Nitrogen 5%, phosphoric acid 2%, potash 0.4%. 



Night Soil: — Night soil collected from the official residences of the 



Station was used after being well rotted. Its nitrogen content was 



0.5-0.55%. 



Sodium phosphate and Potassium sulphate : — Pure chemicals were used. 



(5) Mode of Manuring: — The aforesaid four nitrogenous manures 

 were applied to 8 distinct lots, by various modes as follows: — 



Lot No. 1. The total quantity to be given for 2 years was applied in its 

 entirety at the outset as base manure on May 6th, 3 days previous 

 to planting of seedling. 



