EXPEEIMENTAL STATIONS — TURNIP CEOP 1882. 



363 



comparatively uniform. We see at once that at Pumpherston 

 there is a poor soil, where the crop depends for its nourishment 

 upoD the manure which is immediately applied to it, whereas at 

 Harelaw the manurial wealth contained in the soil is so con- 

 siderable that the turnip crop is practically quite independent 

 of the limited amount of manure applied in the experiments. 

 It is evident that for a slow-growing crop like turnips, where the 

 roots have six months or more to go in search of nourishment, the 

 soil at Harelaw is not very suitable for a manurial experiment 

 of the kind we are engaged in. 



We are endeavouring to determine the relative efficacy of 

 manures of a closely allied character, and all brought up to the 

 same manurial standard. It is evideut that the distinctions we 

 wish to observe have been overpowered by the inherent strength 

 of the soil at Harelaw, and that we shall have to exercise extreme 

 caution in drawing conclusions from such feeble indications. 

 On that account it will be convenient to consider chiefly the 

 data supplied by Pumpherston station, and thereafter to compare 

 them with the indications furnished at Harelaw. 



The kind of manures which claim our chief attention in the 

 case of a turnip crop are of course the phosphates, the various 

 kinds of which form the first ten plots. 



They are divided into two classes, soluble and insoluble, and 

 also into two parts, a winter-manured half and a summer- 

 manured half, as is shown in table No. 11. : — 



No. H. — Phosphate Plots. 

 Pumjjherston. 



