22 
nOYAL HORTICULTURAL SOCIETY. 
V. Poa trivialis. 
vi. Bromus mollis. 
vii. Trifolium pratense (perennc), red clover. 
viii. Lotus corniculatus „ yellow clover. 
ix. Trifolium repens „ white or Dutch clover. 
X. Plantago lanceolata. 
xi. Achillea millefolium. 
xii. Carum carui.' 
" It will be seen that, of the dozen plants experimented on, six 
are true grasses, three clovers, and three common weeds in 
pastures. 
" Por each of the preceding plants six boxes, each 2 feet wide 
and 18 inches deep, were sunk in the land, level with its sur- 
face, in order to protect the soil in them from excessive evapo- 
ration. 
1. One box was left unmauured. 
2. Manured with a purely mineral mixture. 
3. „ ammonia only. 
4. „ nitrate of soda only. 
5. „ ammonia and mineral manures. 
6. „ nitrate of soda and mineral manures. 
" The following manures and quantities were supplied : — 
ounce. per acre. 
" Por box 2. 1-47 sulphate of potash, or at the rate of 1,000 
1*47 carbonate of lime 1000 
•15 sulphate of magnesia 100 
•15 chloride of sodium 100 
1-47 bone-ash 1000 
treated with 1*10 sulphuric acid 750 
Por box 3. '59 sulphate of ammonia 400 
•59 chloride of ammonium 400 
Por box 4. 1-62 nitrate of soda 1100 
Por box 5. The manures used for 2 and 3. 
Por box 6. ,. ■ „ 2 and 4. 
" The amount of nitrogen in the preceding quantity of nitrate 
of soda recommended for box 4, it may be observed, is the 
same as that in the sulphate of ammonia and chloride of ammo- 
nium employed in box 3. 
" Dr. Grilbert kindly furnished the preceding manures, which 
were intimately incorporated with the whole of the soil in the 
