t 



May, 1912.] 



40!) 



Edible Products. 



Plant Salts 



XII. 



XIII. 



XIV. 



XV. 



XVI. 



XVII. 



XVIII 



XIX. 



XX. 



XXI. 



NH 4 N0 3 



1-34 



2-68 



134 



1-34 



0-67 



2'68 



2 '68 



T34 







K2 HPO4 



T578 



1-156 



0-578 



0-578 



289 



1-156 



T156 



0-578 







C a H4 (PO)2 



0-5518 



2-206 



578 



0'289 



1'44 





2'206 



0-289 







M g CI2 























M g (N0 3 ) a 







... 













... 





M g SOi 



0-4253 



1-7012 











1-7012 









No. of leaves 



13 



13 



13 



13 



13 



13 



13 



13 



13" 



13" 



Height in mm. 



952 



535 



833 



1384 



807 



808 



560 



1012 



481 



503 



Flowering date 



Jn. 21 



Jl. 2 



Jn. 28 



Jn. 26 



Jl. 3 



Jn. 30 



Jn. 21 



Jn. 29 



Jl. 10 



Jl, 6 



Grains, Number 



79 



48 



61 



83 



39 



66 



49 



79 



32 



36 



From the data given in this table the 

 following conclusions can be drawn : — 



First. — The control plants, that is, those 

 without any fertilizer are far behind 

 any of the fertilized plants, both in the 

 rate of growth and in the number of 

 grains set. 



Second — The addition of salts of 

 magnesium bad no appreciable beneficial 

 effect in any case. Pots XIII and XVIII, 

 which received the most magnesium, bore 

 the most backward of any of the fertilized 

 plants. Pot XII, which received the 

 smallest dose of magnesium, gave the 

 best results of any of the pots which 

 received any. 



Third.— Of the three plants which were 

 fertilized with ammonium nitrate and 

 potassium phosphate only, that which 

 received least and that which received 

 four times as much throve about equally 

 well. 



Fourth. — The most thrifty plants were 

 those in pots XV and XIX, the next 

 thriftiest in No. II, which differs from 

 XB and XIX only in receiving a much 

 heavier dose of calcium phosphate. 



bifth. — The most promising fertilizer 

 for rice on this land, calculated as per 

 hectare is :— 



NH4 N03 =214-40 Kg. 

 KH2 (P0 4 )2 = 91'84 „ 

 Cam (P04) = 46-24 „ 



NATIVE RICE GROWING IN JAVA. 



(La Culture Indigene du Riz a Java.— 

 Note redigee par M. Amrhyn, chef de 

 cultures au Congo beige, charge, en 

 1911, d'une mission agricole aux Indies 

 Neerlandaises).— Bulletin agricole du 

 Congo beige, Vol. 11., No. 4, pp. 744-748 

 (3 figs.). Bruxelles, Decembre, 1911.) 



(Bulletin of the Bureau of Agricultural 

 Intelligence and oj Plant- Diseases. 

 3rd Year— Number 2, February, 1 912.) 



Rice is cultivated in Java in three 

 different ways : — 



1. In flooded fields (sawaha), 



2. ,, wet fields. 



3. ,, dry fields- 



Cultivation of Rice in flooded Fields. — 

 The rice fields form a succession of 

 terraces arranged without any slope 

 52 



and surrounded by small banks to keep 

 in the water. The latter is conveyed 

 to the highest terraces and successively 

 empties on to the lower fields. 



Some time before starting work, at 

 the beginning of the rainy season, the 

 rice field is flooded. The soil slowly 

 grows wet. When it is sufficiently 

 softened, ploughing begins ; each plough- 

 ing is followed by a harrowing, and 

 cultivation continues till the surface is 

 transformed into soft mud. 



The nurseries consist of small areas 

 surrounded by banks, which are like- 

 wise ploughed several times after flood- 

 ing. The surface water is then drained 

 off, and on the mud, side by side, whole 

 rice ears are placed. After sowing, the 

 nursery is once more flooded. In eight 

 or ten days the water is drawn off during 

 the night, and irrigation after that only 

 effected by day. This goes on for about 

 two months. 



