4oo Summary of Agricultural Experiments, [august, 



Oxfordshire C.C., 1909; Bui. vi., Expts. conducted for the Bucks C.C., 

 1909). — These experiments are being conducted at the College Farm, at 

 ten centres in Oxfordshire and at seventeen centres in Buckinghamshire, 

 the object being to ascertain the effect of the chief artificial manures 

 when used singly and in combination on the quantity and quality of 

 the herbage. The plan of manuring is the same at all. One plot is 

 dressed with 1 cwt. nitrate of soda, 5 cwt. basic slag, and 3 cwt. 

 kainit per acre; on three others two only of these constituents are 

 applied in the same quantities, while three plots receive the single 

 manures. There is also a plot dressed with sixteen loads of dung. 

 At some centres where lime is abundant in the soil superphosphate is 

 substituted for basic slag. At the College farm the experiment has 

 now been carried on for three years, and the crop without manure has 

 on the average been 1 ton 18 cwt. per acre. Nitrate of soda, kainit, 

 and basic superphosphate applied singly have produced but little increase. 

 Dressings of the three fertilisers together, of 1 cwt. nitrate of soda 

 and 3 cwt. kainit, and of 1 cwt. nitrate of soda and 5 cwt. basic slag, 

 have been the most effective, the average crop in each case being about 



2 tons 7 cwt. ; a similar result was obtained from sixteen loads of dung. 



In Oxfordshire the experiment has only lasted one year, and no 

 conclusions are drawn at present. 



In Bucks four years' results have been obtained from three of the 

 centres, and three years' results from eight centres. The average crop 

 from fifteen centres without manure has been 1 ton 7 cwt. ; the dung 

 and the complete dressing of artificials have both increased this to 

 about 2 tons. None of the incomplete dressings have been so effective, 

 the best results from them being obtained from 1 cwt, nitrate of soda 

 and 5 cwt. basic slag, with which the crop was 1 ton 17 cwt., and of 

 the single manures, from 5 cwt. basic slag, the crop being 1 ton 

 14 cwt. 



Manuring of Grass Land (Cumberland and Westmorland Farm 

 School, Newton Rigg, Rept. 1908-9). — The trial plots have been under 

 experiment for twelve years. They have been manured every third year, 

 in the other years the crop being dependent upon the residual manurial 

 matter in the soil. The average crop without manure during the twelve 

 years has been 29 cwt. per acre. Ten tons of farmyard manure increased 

 the crop by 12 cwt. The most effective of the artificial manures was 

 a mixture of f cwt. nitrate of soda, ih cwt. kainit, and 3 cwt. super- 

 phosphate, which gave an average increase of 9 cwt. per acre. Sulphate 

 of ammonia and basic slag have not been quite so good on this soil as 

 nitrate of soda and superphosphate. 



Manuring of Grass Land (East Sussex Educ. Com., Rept. on Meadow 

 Hay Expts., 1909). — Manurial trials were conducted on twenty farms, 

 but as the results from a few were not considered reliable, those from 

 seventeen only are used in finding the averages. The average crop 

 on the unmanured plots was 31 cwt. 3 qr., a very satisfactory yield. 

 Ten tons of farmyard manure were applied on three plots at each of 

 the centres, and the average yield of these fifty-one plots was 41 cwt. 



3 qr., an increase of 10 cwt. In alternate years these plots will 

 receive a dressing of artificials, no manure being given in the inter- 

 mediate year. A complete dressing of artificials, composed of cwt. 

 nitrate of soda, 2 cwt. superphosphate, and 2 cwt. kainit, produced 



