204 



ascertained; indeed, so far as we know, it is only at Rothamsted 

 that the determination is made, and there, where all the conditions 

 are favourable and the workers thoroughly competent, it amounts 

 to 10%. 



"In the Sussex experiments a number of plots were laid out 

 on each of 20 farms, but as the experiments only lasted one year 

 it is impossible to draw any definite conclusion. 



" The experiments in Nothumberland have been carried out 

 over several years and they illustrate the value of basic slag in 

 improving poor clay pastures. On the light soils, potash has been 

 found very effective. 



" The Cirencester experiments on pasture have been going on 

 for 1 8 years and show some interesting results, differing in many 

 ways from those obtained at Rothamsted. Thus the plot receiving 

 sodium nitrate alone was poor, tufted, and worse than the plot 

 receiving ammonium sulphate alone. Ustilago was most prevalent 

 on the plot receiving kainit alone." 



XIX. 



Organic fertilisers. Green manuring. Sea-weeds and other 

 vegetable refuse as manure. Composts. Peat in manuring. - 

 Dung and Urine. Farmyard manure. Night soil. Utilisation of 

 town-sewage. Animal refuse as manure. Guanos. Manure 

 value of cattle-feeds. 



EDWARD J. RUSSELL. The Composition of Seaweed and its Use 



as Manure. The Journal of the Board of Agriculture, N. 6, 

 September 1910, p. 460. 



The light soils of the Isles of Scilly are very dependent on a 

 supply of organic matter to retain moisture ; as much as 50 tons 

 of seaweed per acre is therefore applied for early potatoes, nearly 

 as much for mangolds and other roots, but smaller dressings are 

 put on for corn. A certain amount is also allowed to rot in piles, 

 and is then used for bulb cultivation and general garden purposes. 



