8 EXPERBIEXT STATION. [Jan. 



position, and a large proportion of kernel to cob is a character 

 of much importance. 



4. Great improvement in yield of crops can be made by 

 careful selection, and in the case of self-fertilized plants by 

 pollinating from superior individuals. 



5. Laboratory experiments indicate that the loss of nitrogen 

 from manure cannot economically be prevented by use of 

 chemicals. The best method of preservation appears to be to 

 keej) the manure moist and well packed. 



6. Among the different chemicals tested sulfate of magnesia 

 appears to be one of the best nitrogen absorbents, while gypsum 

 (sulfate of lime), although most commonly used in farm prac- 

 tice, is one of the least active absorbents. 



7. Tobacco injury, due to malnutrition or overfertilization, 

 usually occurs on land that is underlaid with an impervious 

 subsoil and poorly drained, as increased evaporation brings such 

 an excess of plant food to the surface that normal growth is 

 checked. Deficiency in rainfall may also have some influence. 

 The remedy consists in breaking up the subsoil or in under- 

 drainage, and also planting the land for a year or two to corn 

 or grass. 



8. Alfalfa has been shown to be rather superior in nutri- 

 tive value to clover hay, and while it is a more costly crop to 

 establish, its much greater length of life and larger annual 

 yield render it preferable to clover wherever it can be grown. 



9. The bronzing of maple leaves is not caused by pathogenic 

 organisms. It occurs on very hot, dry days in periods of 

 severe drouth, and is purely functional in nature. 



10. From the standpoint of cost and efficiency the high- 

 pressure coarse nozzle is superior to the low-pressure mist 

 nozzle, especially for work on large trees. The nozzles at 

 present in use can undoubtedly be greatly improved. 



11. The soil best adapted to roses is one which contains from 

 8-12 per cent, of clay, and is well supplied with silt and the 

 ■finest grades of sand. The proportion of these three classes of 

 material should exceed Y5 per cent. 



12. The elm is greatly affected by the texture of the soil 

 in which it grows. Tf this is right it is usually free from 

 disease and attains enormous size and ffreat beautv. 



