Report of the Consulting Chemist for 18G9. 
145 
Samples of the Experimental Fields are desired to l)e sent to 
Dr. Voelcker, 11, Salisbury-square, Fleet-street, London, E.C. 
Field Experiments on Potatoes. — The following experiments 
are specially recommended on light soils ; each plot to be one- 
twentieth of an acre : — 
riot. 
1. No manure. 
i Mineral superphosphate 
Crude potash salts . . 
Sulphate of ammonia .. 
3. Good rotten dung 
^ i Mineral superphosphate 
"(Crude potash salts 
5. A^o manure. 
i Mineral superphosphate 
Crude potash salts 
Nitrate of soda 
7. Peruvian <:uano 
g < Mineral superphosphate 
'(Common salt 
9. Good rotten dung . . 
10. No manure. 
The artificials should be first mixed with ashes, burnt clay, 
or dry earth, and then dug in, or ploughed in, quite early in 
spring, when the dung is put on the land and when the potatoes 
are planted. 
Experiments on Artificial Grasses. — Each plot to be one- 
twentieth of an acre : — 
Plot. 
1. Nitrate of soda 22 lbs. 
2. Sulphate of ammonia 22 lbs. 
3. Mineral superphosphate (dissolved coprolites) .. .. 22 lbs. 
4. (jommon salt 22 lbs. 
5. No manure. 
6. Muriate of potash 22 lbs. 
7. Sulphate of potash 22 lbs. 
8. Sulphate of lime 56 lbs. 
f, ( Jlineral superphosphate 22 lbs. 
(Nitrate of soda 22 lbs. 
, j Mineral superphosphate 22 lbs. 
(Muriate of potash 22 lbs. 
11. No manure. 
The manures should be applied not later than the end of 
February, and the first crop, as well as the aftermath, be weighed 
green. The produce of each crop should be weighed directly it 
is cut. 
Experiments on Permanent Pasture. — Each plot to be one- 
tenth of an acre : — 
22 lbs., or at the rate of 4 cvvt. per acre. 
11 lbs. „ 2 
11 lbs. 
20 tons per acre. 
4 cwt. per acre. 
1 ton 
22 lbs. 
22 lbs. 
22 lbs. 
11 lbs. 
11 lbs. 
22 lbs. 
22 lbs. 
22 lbs. 
1 ton 
4 
2 
4 
4 . " 
20 tons per acre. 
VOL. VI. — S. S. 
