46 



THE AGRTCULTUEAL NEWS. 



jASUAnY 30, 1904. 



ANALYSIS OF GRENADA CACAO SOIL. 



The following is a report by Professor J. P. 

 d'Albuqiierque, M.A., F.I.C., F.C.S., on two samples of 

 soil from Belle Yiie estate, (Jrenada, forwarded by the 

 Commissioner of Agriciiltiiro for A. Wellesley Lewis, 

 Esq :— 



The .sample.^ of soil were mixed and an averaj,'e sanqile 

 anaty.^ed : a similar course was pursued with the .saniple.s of 

 subsoil. 



The aiialy.ses indicate a clayey soil, deficient in 

 pho>phoric acid. The t(>tal p^Tcentage of potash is ratlier 



low, but of this a fair projiortiou is immediately available. 

 The amoiuit of carbonate of lime though not gr^'at is probably 

 sutHcient for the needs of the trees. The percentage of 

 nitrogen is rather high. 



I recommend an application of 4 cwt. of basic slag an<l 

 .", cwt. of suljihate f>f potash per acre either dug in the holes, 

 before the cacao is jilanted or lightly forked in between the 

 trees. When the tree.s show signs of flagging growth, apply 

 1 cwt. per acre of nitrate of soda as a to]! dressing near the 

 trees and .soon after the cacao crop 1ms been reaped. 



»ll.( UANICAL ANALYSIS (kESULTS fALCULATEU TO SOIL DKIKU AT 100 c). 



CHEMICAL ANALYSIS OK FINE .SOIL (rESCLTS CALCCLATEIi TO SOIL IlIlIEl) AT 100 c). 



Insoluble siliceous matter ... 



Soluble silica ... 



Pota.ssium oxidet 

 Sodium oxide ... 

 Calcium oxide 

 Magnesia 



Manganese oxide 



Iron oxide and alumina 



Phosphoric anhydride t 



Sulphuric anhydride 



Carlxmic anhydride tt 



Combined water and organic matter 



* Containing Nitrogen 



t Containing Potassium oxide soluble in 1 per cent, citric acid 

 J Containing Pho8i)horic anhydride soluble in 1 per cent. 



citric acid ... 

 t+ Equal to Carbonate of Lime 



Soil. 



Per cent. 



:U'.M17 

 •Otid 

 •12(1 

 •118 

 •020 

 •(><i2 

 •1(10 



4t)l:!'.t 

 •141 

 •O'.Mi 

 ■175 



l(i-730 



100 OOO 



•204 

 •020 



trace 

 •o!l8 



Pt)uuds per 

 -\cre. 



1,010.010 

 1.080 

 3,780 

 3, .540 



18,000 



10,8ti0 



4,800 



1,384,170 



4,2.30 



2,880 



5,250 



■50 1,000 



3.000.000 



8,820 

 000 



11,040 



Subsoil 



Per cent. 



33-887 

 •090 

 •120 

 •114 

 •040 

 •750 

 •180 



47-208 

 •112 

 •142 

 •205 



16-540 



100-000 



•231 

 •021 



trace 

 •400 



Pounds per 

 .\cre. 



1,010.010 



2,700 



:i,780 



3,420 



llt,'2C0 



22,080 



5 400 



1,410, '.'40 



3,.3O0 



4,200 



0.1.50 



400,200 



;,noo,ooo 



o,o:w 

 o:50 



13,080 



