30 



2. A timely shallow use of the cultivator or the hoe for the remov- 

 al of weeds favors a uniform progress of growth. A careless use 

 of cultivator or hoe invariably checks more or less the growth of the 

 plants and modifies more or less their structure and general character. 



3. The different. fertilizer mixtures used in our experiments have 

 affected in a less marked degree the weight of the crop raised by 

 their aid than the quality. New lands reduced by previous cropping 

 to a state approaching general exhaustion of available plant food 

 — if otherwise well fitted for raising tobacco — have given excellent 

 results when supplied with a suitable mixture of fertilizing ingredi- 

 ents in quantities similar to those applied during our experiments 

 (Westfleld.) Such lands are at times preferable to old tobacco 

 lands overcharged with remnants of all kinds of saline ingredients 

 usually associated with the common run of commercial fertilizers. 



4. Cotton seed meal, linseed meal, and castor pomace have 

 proved equally good sources of nitrogen, for the successful raising 

 of tobacco, when used in connection with nitrate of soda or potash, 

 sufficient to furnish one fourtli of the nitrogen called for by the crop. 



5. Nitrate of soda as part of the nitrogen su|)ply of the fertilizer 

 (25%) when used in presence of acid phosphate or dissolved bone- 

 black, etc., has been accompanied with better results regarding 

 quality of crop than nitrate of potash under otherwise similar condi- 

 tions. 



6. Cotton seed hull ashes and high grade sulphate of potash 

 have proved in our obseryation most valuable sources of potash for 

 tobacco, the former in the majority of cases leading. Nitrate of 

 potash has produced excellent results when used in connection with 

 an alkaline phosphate as phosphatic slag meal or with carbonate of 

 potash-magnesia. Our results with potash magnesia sulphate as 

 main potash sources of a tobacco fertilizer are not encouraging. 



7. The difference noticed in the color of ash, etc., in case of 

 the crop being raised upon different plats is in several instances so 

 slight that any attempt at classifying the various fertilizers used 

 with reference to their superior fitness cannot be otherwise than 

 somewhat arbitrary. With this qualification in mind, the following 

 classification is offered for the consideration of parties engaged in 

 the cultivation of tobacco in our section of the country : 



