128 Decoinposition of CijcoKiiiilfh' and Diri/aiwrh'auu'de 



Table I. Dr// Mailer and Amoimls of Applied Nitrogen Recovered 

 in Mustard Crop. 



Treatment 

 Series I: 



Large pots (20 kilos soilj.Nadded 

 = 50 mgs. per kilo soil or 1 

 gram per pot 



Control (no N) 



Ammonium sulphate ... 



1. Cyanamide ... 



2. Cyanamide 3 parts ) 

 Dicyanodiamide 1 part ( 



3. Cyanamide 1 part 1 

 Dicyanodiamide 3 parts ) 



4. Dicyanodiamide alone 



N added = 100 mgs. per kilo soil 

 or 2 grams per pot 



1. Cyanamide ... 



2. Cyanamide 3 parts "| 

 Dicyanodiamide 1 part ) 



3. Cyanamide 1 part ) 

 Dicyanodiamide 3 parts I 



4. Dicyanodiamide alone 



Series II: 



Small pots (10 kilos soil), N added 

 = 100 mgs. per kilo soil or 

 1 gram per pot 



Control (no N) ... 



2. Cyanamide 3 parts "| 

 Dicyanodiamide 1 part J 



3. Cyanamide 1 part ") 

 Dicyanodiamide 3 parts / 



4. Dicyanodiamide alone 



N added = 200 mgs. per kilo soil 

 or 2 grams per pot 



2. Cyanamide 3 parts "| 

 Dicyanodiamide 1 part J 



3. Cyanamide 1 part "| 

 Dicyanodiamide 3 parts J 



4. Dicvanodiamide alone 



Dry matter. Nitrogen % applied 



Grams per removed. nitrogen 



pot (mean "„ N in Grams removed 



of 3 pots) dry matter per pot in crop 



12-25 



plants 

 killed 



0-64 



•813 



32-5 



