PROCEEDINGS OF THE OHIO ACADEMY OF SCIENCE. 261 



frost 25%, 50%, or 75% of the time? If so what are the dates 

 of spring frosts? 



If it is true that nitrate of soda has its best effect upon 

 crops in dry and warm weather and sulphate of ammonia pro- 

 duces the best results in moderately wet weather, should not the 

 kind of fertilizer to be used depend upon the climate and the 

 season of the year? Is it true that Agricultural Experiment 

 Station investigators have been carrying on long fertilizer ex- 

 periments without taking into account the different amounts of 

 heat and rainfall during the different years covered by the tests ? 



It has been found that the keeping quality of seeds as well 

 as their germinating vigor depends upon the condition of the 

 weather while they are ripening. In Europe it has been found 

 that the weather during the ripening of some crops has more 

 to do with the yield from that seed than that of any similar period 

 during the growth of the plant. 



This being the case the exact condition of the weather when 

 seeds of any crop are ripening should be known and those selected 

 from only that district that had the most favorable ripening con- 

 ditions, even if one has to go a long distance for them. The 

 question will then follow whether we can vary the time of plant- 

 ing, the thickness of the stand, or the kind of fertilizer so that 

 the date of ripening can be brought into that period when weather 

 most favorable for the seed is most apt to prevail ? 



Why is the keeping quality of onions, for example, different 

 from seed grown in California than that grown in Michigan ? 

 Why was it considered necessary for many years to get cabbage 

 and cauliflower seed from Long Island in order to have them 

 head in the most satisfactory manner? Why is it that while 

 spring wheat shows a better yield and quality if the seed is 

 obtained from more* northern districts winter wheat seed, on the 

 other hand, gives best results if selected from more southern 

 districts ? 



If it is true that wheat ripened in a marine climate contains 

 such a low per cent of protein, as compared with that grown 

 in an inland continental climate, that it becomes necessary to 

 increase the consumption of other nitrogenous foods, why do 



