t 6. ] 



alysis. A ten plot experiment may be made after Ville's 

 method to understand the chemical character of a particular 

 soil. There should be ten equal plots manured in the follow- 

 ing way : 



No. i. Sodium nitrate (Na NO 3 ), 22ofl5s. or Ammonium 

 chloride (NH 4 Cl), I4ofl5s. i.e. the quantity containing 361bs. 

 of N, should be applied per acre.* 

 No. 2. Unmanured plot. 



,, 3. Sodium phosphate (Na 2 HPO 4 \ 44Tbs., i.e. the 

 quantity containing 22tbs. of P 2 O 5 should be applied per 

 acre.* 



,, 4. Unmanured plot. 



5. Quick-lime, CaO, 4olr3s. should be applied per 

 acre after slaking. 



,, 6. Unmanured plot. 



.,, 7. Potassium Chloride (KC1), 5otbs. i.e. the quantity 

 containing 32lbs. of K 2 O should be applied per acre.* 

 No. 8. Unmanured plot. 

 No. 9 and 10 unmanured plots. 



64. The plots need not be more than a few yards in 

 length and width. They should be sown very thin with a 

 mixed crop of arahar and maize or some other cereal and 

 pulse crop together. The effect of lime and potash will be 

 chiefly manifest on the pulse crop and that of N and P 2 O 5 

 and also K 2 O on the cereal crop. The same quality and 

 the same number of seeds should be sown in each plot at 

 similar distances and the same treatment given to all. The 

 crops must be protected from parasites and pests, from 



* (i) Na NO 3 =23+ 14+48=85; 14: 36:185 : x, x about 2i9lbs. or 

 say 22olbs. 



(2) N H 4 Cl = 14 + 4 + 35'5 = S3' 5 ; 14 : 36: :53'5 : *, *= i37|lbs. or say 

 I4olbs. 



(3) Na 3 HP0 4 =46+ i +31 + 64=142; P 3 O 5 = 62 + 80= 142 ; 2X 



144 = 288 ; 142 : 22 : : 284 : * ; x = 446 



(4) KClss 39 + 35.5 =74-5; 2x74.5=149; K 2 O = 78 -f 16 = 94 ? 

 94 I 32 '. '. 149 ! x .*. * = about 5olbs. 



