PRACTICAL METHOD OF TESTING SOILS. 



419 



I 



6 



B 



Ground Ground 



phos. phos. 



10 lbs. 10 lbs. 



Sulphate 



of potash. 



3 lbs. 



Sulphate Sulphate 



of ammo, of ammo. 



3 lbs. ' 3 lbs. 



Super- 



phos. 



15 lbs. 



Super- 



phos. 



15 lbs. 



Sulphate 



of potash. 



3 lbs. 



Sulphate Sulphate 



of ammo. , of ammo. 



3 lbs. 3 lbs. 



Ground 



phos. 



10 lbs. 



Sulphate 



of potash. 



3 lbs. 



Super- 



phos. 



15 lbs. 



Sulphate 



of potash. 



3 lbs. 



Ground 



phos. 



10 lbs. 



Sulphate 



of potash. 



6 lbs. 



Sulphate : No- 

 Super- Sulphate of ammon. thing, 

 phos. of amnion. 6 lbs. 

 15 lbs. 6 lbs. 



Any one can make np a set of manures of that kind for 

 himself. The manures for each plot and half plot should be 

 thoroughly mixed and put into little bags, carefully labelled. 



Directions for Spreading the Manures, 



Choose as calm a day as possible. Lay down each bag upon 

 its own plot as indicated by the label, and read over the labels 

 to see that every one is right before opening the bags. Should 

 the weather not be quite calm, the manures should be mixed 

 with damp earth ; and in any case this is to be recommended, 

 so that the manures' may be made up to something like the same 

 bulk. There must not be the slightest blowing of the manure 

 from one plot to another. Apply the manure broadcast. 



Any member of the Society wi.shing to perform this experi- 

 ment, and willing to communicate the result to me, will receive 

 a schedule on which is indicated the information required. All 

 that is necessary is that he should send me a note or a post- 

 card with his address and the words " 7-plot test " written on it, 

 and addressed — 



Dr AlTKEN, 



8 Clyde Street, 



Edinburgh. 



