1 Aprin, 1899.] QUEENSLAND AGRICULTURAL JOURNAL. 295 
MANURE FOR COFFEE. 
Iy Brazil the best soils are rich in phosphoric acid and potash, containing usually 
18 to 35 per cent. of the former and 10 to 25 per cent. of the latter. To 
restore the amount of mineral matter annually removed by the crops, the 
added fertiliser contains about 8 grammes phosphoric acid, 35 grammes potash, 
and 16 erammes nitrogen per tree. Stable manure must also be added to the 
soil to get the best results. 4, 
Planting Opinion says :—The modern method of applying fertilisers tends 
to an increased production of coffee. Thus the products from fifty trees 
raised in the trial garden averaged per tree as follows :— 
Planted. 
1892. 1893. 1894. 1895. 1896. 1897. 
Gram. Gram. Gram. Gram Gram. Gram. 
ienitlieg) ay SRB An oy 25 35 200 490 605 560 
Fertilised +0 tet 4 ne ites 40 120 780 480 700 900 
For well-fertilised trees 20 years old the products should average 2°5 kilos 
(about 54 1b.) per tree. 
MANURING OF TROPICAL PLANTS.—CORN, 
Corn grows best on a soil that runs deep, is medium heavy and rich in humus ; 
it also manages to get along on a light soil, although in that case it would 
require more liberal fertilisation, according to the condition of the soil. 
Corn requires much larger quantities of plant-food ingredients than other 
cereals. r 
The following quantities of plant-food ingredients are removed from one | 
acre :— 
(a2) By an average crop— 
Potash. Phos. acid. Nitrogen. 
of 2,280 lb. ear corn... ro pemen Sj culls 12°7 lb. 35°7 lb. 
» 3,122 ,, fodder ... ae eee Lees 19; 15:0 ,, 
” 1,070 ” cob ses ose ese 25 ” O3;28n 25 ” 
Total 62:0 lb. 24°8 lb. 53°2 lb. 
(b) By a good crop— 
of 4,460 lb. ear corn... cu xn UGG) Uo, 25°4 |b. 71:4 Ib. * 
» 5,798 ,, fodder ... .. «. 951,, 92:0 ,, 278 ,, 
oh) 2,149 ” cob cos 08 eee 49 ” 05 ” 49 ” 
——————— 
Total 116,5 1b. 47,9 1b. 104, 1 Ib. 
__ In comparison with other grains, corn removes considerably larger quan- 
tities of potash and nitrogen from the soil; it therefore requires a soil propor- 
tionally rich in both of these ingredients. Liberal fertilisation with stable 
Manure produces a beneficial effect, especially upon soils deficient in humus. 
However, as stable manure can be put toa better use in the tropics and with 
More profit, artificial fertilisation, which will produce very favourable results 
Against a small outlay, must be resorted to. 
