368 Analysis of Manures. 



upon root-crops- in certain soils are more striking than the 

 effects produced by guano, superphosphate, and other artificial 

 manures. 



9. Thin land, from which a good quantity of ashes has been 

 obtained, should not be dressed with rotten dung, guano, or, 

 indeed, any kind of manure. Ammoniacal manures especially 

 should be avoided. 



10. The operation of paring and burning is the most econo- 

 mical means for raising on certain poor soils a good crop of 

 turnips. 



11. It is therefore not likely soon to give way to other plans 

 of cultivation on such soils. 



12. Lastly, instead of being an antiquated operation, it is a 

 practice the advantages of wiiich are fully confirmed and ex- 

 ])lained by modern chemical science. 



lloyal Agricultural College, Cirencester, Dec. 1857. 



XIV. — Communication on the relative Value of Cattle-hox Manure 

 and Farmyard Manure. By Charles Lawrence. 



Having been informed that, amongst the] minor contributions 

 invited for tlie Journal of the Society, any analyses of matters 

 with which farmers have to deal would be acceptable, I send 

 three analyses of manures which I have had made at various times 

 by Professor Way and Dr. Voelcker. Nos. 1 and 2 were made 

 some years ago. 



No. 1 is a comparative analysis I was desirous of obtaining 

 to test the relative values oi farmyard manure and manure from 

 the cattle-boxes. My object having been a fair comparison of 

 the value of manure made under nearly similar circumstances 

 in other respects, I obtained a sample of manure from an open 

 yard in which animals were being fatted, rather than from a 

 mere stock-yard for young beasts ; and the other sample was 

 taken from my boxes. 



No. 2 is an analysis of a sample of manure taken from my boxes, 

 made at a subsequent period by Professor Way. The small 

 proportion of ready-formed ammonia would operate unfavourably 

 on tlie minds of farmers who have yet to learn that ammonia is 

 the result of fermentation and decomposition, the prcventio7i of 

 which is a main object of the box system of feeding. 



No. 3 is an analysis, made by Dr. Voelcker, of manure taken 

 at another period, soon after it had been removed from the same 

 boxes and heaped. Those who have not previously inspected 



