REPORTS OF EXPERIMENTS WITH DIFFERENT TOP-DRESSINGS. 77 



On the nitrate soda with sulphate ammonia plots the crop 

 looked the next best after the guano both in thickness and colour, 

 though it has not weighed so well as some of the others. 



On the chloride ammonium in solution plots the crop looked 

 nearly equal to that with the same dressing applied dry. Though, 

 as will be seen from Table I., there is considerable variety in the 

 weight of crop on the individual plots, yet the large crops balance 

 the smaller, and the average on the four will thus approximate to 

 the truth. 



There is in one or two of the sets a plot whose crop deviates 

 in weight out of all proportion from the greatest deviation of any 

 of the other sets, and thus gives a false average, but the amount 

 by which it is wrong will not be great, as the fault of the one is 

 distributed over the four. 



From Table I. it will be seen that the weight of crop on the 

 four plots of the same manure varies slightly. This can scarcely 

 be owing to the irregularity of the soil altogether ; for take one 

 of the worst plots, viz., 36 : it is 21 lbs. below the average of the 

 other three with the same manure, while those on each side of it 

 are above the average of their quadruplicates. This variety was 

 greatly owing to the plants not being equally close throughout. 



The second crop received no additional dressings. It was cut 

 on September 27th, being just 3 months since the removal of the 

 first. During that time there had been rain to the amount of 6 

 inches, viz., during July, 2 - 7 ; August, 24 ; September 09 ; — 

 total, 6 - 0. 



At the time of cutting, the plots had the following appear- 

 ance : — 



On the nothing plots, the grass was rather thin, but the clover 

 was very good. 



Of the glue plots, the clover was not good on No. 2. No. 12 

 had been spoilt by the hay cock lying on it, and was therefore 

 left out entirely. Nos. 22 and 32 had a very good crop of clover 

 on them, and the grass also was good. 



On the sulphate of ammonia plots the clover was bad, except 

 on No. 23. 



On the chloride of ammonium plots the clover was fair on the 

 whole ; on Nos. 4 and 24 it was good. 



On the nitrate of ammonia plots the clover was poor. 



On the nitrate of lime plots the clover was good on 16 and 26, 

 but poor on 6 and 36. 



On the nitrate of soda plots the grass and clover were very 

 fair, except on 27, on which the clover was bad. 



On the Peruvian guano plots the grass and clover were both 

 good. 



On the nitrate of soda with sulphate of ammonia plots the grass 

 and clover were good, except on plot 29, which was very poor. 



