1910.] Summary of Agricultural Experiments. 231 



other artificials. Steamed bone flour showed much less effect than 

 either superphosphate or slag. The addition of sulphate of ammonia 

 and sulphate of potash to the superphosphate gave an increase of 

 25 cwt, and the best average result. 



Manuring of Mangolds and Swedes (Wilts. C.C., Results of Field 

 Mammal Demonstration, 1908-9). — Six experiments on the manuring 

 of mangolds and six on the manuring of swedes were carried out at 

 different centres in the county. 



The schemes on which these demonstrations were carried out 

 received the general approval of the Board of Agriculture and Fisheries, 

 and were largely based on the schemes submitted to the Board by the 

 Agricultural Education Association. They appear to have been very 

 carefully carried out, and this report gives the results obtained at each 

 centre, together with full particulars as to the soil, weather, and 

 previous cropping. 



In the case both of the mangold and the swede experiment, there 

 were eight plots at each centre, the area of each plot being eight 

 perches. One plot received no artificial manure, one plot received a 

 complete dressing comprising kainit, superphosphate, and nitrate of 

 soda, three plots received dressings composed of two of these manures, 

 and three plots dressings of each manure alone. The quantities in the 

 mangold experiment were as follows : — Kainit, 5! cwt. ; superphos- 

 phate, 6 cwt. ; and nitrate of soda, 2§ cwt. per acre. In the swede 

 experiment, the quantities were : kainit, 2f cwt. ; superphosphate, 

 6 cwt. ; and sulphate of ammonia § cwt. 



On the average of all the mangold centres, the complete dressing 

 gave satisfactory results, the increase amounting to n| tons, or about 

 535., after deducting the cost of the manure. The increase at one 

 centre was under 3 tons, but elsewhere it ranged from 95 to 19! tons. 

 The plots which received kainit and nitrate of soda did equally well, 

 and owing to the smaller cost of manures the net gain averaged 68s. 

 per acre. Superphosphate and nitrate of soda gave an average gain 

 of 9 tons 2 cwt., and superphosphate and kainit a gain of 7 tons 13 cwt., 

 representing in money 435. and 395. respectively. The results from the 

 plots receiving only a single manure were lower, averaging from 3^ to 

 4! tons. 



The - general tendency of the experiments is in favour of kainit and 

 nitrate of soda, which gave a better result than the complete manure 

 at four out of the six centres at a smaller cost. 



In the case of the swede experiments, the results at one centre 

 were irregular and produced very little result, owing to the wet season. 

 Taking the average of the other five, the best result was obtained 

 , from the complete manure, which gave an increase of nearly 11 tons 

 per acre, or a gain, after deducting the cost of the manure, of 875. 6d. 

 per acre. Kainit and superphosphate, and kainit and sulphate of 

 ammonia, gave approximately similar results, with averages of 7 tons 

 15 cwt. and 7 tons 8 cwt. per acre, or gains of 62.?. Sd. and 646. 

 respectively per acre. Superphosphate by itself gave 7 tons 1 cwt., or 

 a gain of 62s., so that the addition of kainit to this manure had 

 apparently little effect; in fact, at two centres superphosphate alone 

 gave a higher result. In the same way the application of sulphate 

 of ammonia, in addition to the superphosphate, produced no further 



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