237 



expensive and only one soaking can be given, a rapid-stooling ; 

 shorter-lived wlieat will probably be best and will profit most. In 

 semi-arid, dry farming regions, everything depends upon the 

 drought-resistance of the variety. In choosing a suitable wlieat 

 for such and for irrigated regions the utmost care will have to be 

 exercised to get one that exactly fits the conditions ; for Lere 

 every dollar spent in making or finding the very best type, will 

 be many times repaid, each season, by greater yield or lesser 

 waterdues. In extending the wheatbelt northwards, it is again 

 not one ideal variety which is required. Jn some places the wi riter 

 is extremely rigorous but not too long, at other places the 

 sunimerseason is very short of duration. in the first spot, a summer- 

 wheat will probably be most profitable, whereas in such places 

 where the growingseason is too short, a winterwheat will be 

 required. 



The different wheats found wild by A ar o n s o n inPalestine 

 might prove usefull in dry countries, if only as carriers of usefu.ll 

 genetic factors, or the reverse, serving to get rid of some factors 

 absent from them. 



The work of producing suitable varieties of wheat and other 

 plants for different regions of one country is not the work for 

 one man. It is impossible to ask the experimental breeder to do 

 the work of testing the different types he has produced or 

 collected. This is the work of the agriculturist, the wheat- expert 

 or the farmer. One man could do all the scientific work for one 

 country, if only the practical men will cooperate, by stating their 

 needs and testing his types in comparison. In this a connection 

 between a single central experiment-station ander an experimental 

 biologist and the different agricultural experimentstations will be 

 most usefull. It has been sufficiently demonstrated at Svalof, that 

 there are no short cuts to the recognition of a useful variety as 

 such, that the only way to see whether a given type has practical 

 value is to grow it under field-conditions in comparison with 

 established types. 



It has been beleived here and there that one could 

 recognize the valuable types by a botanical study, important 

 qualities being correlated to anatomical differences, and I believe 

 much valuable time has been formerly lost at Svalof by this 

 kind of work. With the exception of Blaringhem in his work with 

 barley, I think all experimenters with agricultural plants have 



