Field-Experiments on Permanent Pasture. 435 



No. 8. Superphosphate and guano. Brown ; a great deal of 

 •clover and trefoil. 



No. 9. Dark green, short ; more clover than on Plot 7 — 

 apparently the best plot. 



No. 10. Bare ; rather better than No. 5. 



After the first week of May, the grass crop grew more 

 rapidly. The crop was mown on the 1st of July, 1869, and the 

 grass weighed, and on the 8th the weight of the hay was ascer- 

 tained. The results obtained are incorporated in the Table on 

 page 436. 



It appears from the tabulated statement of results, that common 

 salt, as well as quicklime and the mixture of quicklime and salt, 

 caused a decrease in the produce. 



Bone-dust apparently caused also a decrease, but as the 

 produce on one of the unmanured plots (No. 4) is nearly 

 the same as on Plot 3, it may be concluded that the bone- 

 dust had neither a beneficial nor a contrary effect on the 

 pasture. 



Peruvian guano, and in still higher degree the mixture of 

 superphosphate with Peruvian guano, produced a considerable 

 increase in the hay crop. The increase amounted to nearly 66 

 per cent, in the case of guano, and 84^^ per cent, in round 

 numbers in the case of the mixture of Peruvian guano and super- 

 phosphate. 



The money value of the hay may be taken at 5Z. a ton. After 

 <lcducting the price which would be paid for the various 

 <lressings, the money value of the produce from each plot, cal- 

 culated per acre, and the loss or gain on the expenditure on 

 ip.anure, is shown for each plot in the Table given on p. 437, 

 iVom which it appears that Peruvian guano alone gave a slight 

 profit for the outlay in money in the first year of its application 

 to the land. 



Produce in 1870. — In the following year the produce from 

 «ach experimental plot was carefully weighed, green, as grass, 

 <ind also as hay. The extreme drought in 1870 prevented again 

 a second cutting being taken. 



The results obtained in 1870 are incorporated in the Table on 

 page 438. 



It will be seen that neither quicklime nor bone-dust, nor any 

 of the other manures, except the mixture of superphosphate and 

 potash salts employed on Plot 4, and the mixture of Peruvian 

 guano and superphosphate, gave an increase in the hay crop in 

 the second year of the application of the manures. The largest 

 increase was obtained on Plot 9, on which in the preceding year 

 Peruvian guano and superphosphate were used at the rate of 5 

 cwts. each per acre. 



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