237 
expensive and only oiie soaking can be given^ a rapid-stooling^ 
shorter-lived wheat 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 wheat 
for such and for irrigated regions the utmost care will have to be 
exercised to get one that exactly fits the conditions^ for heje 
every dollar spent in making or finding the very best type^ will 
be many timea repaid^ each seasoii^ by greater yield or lesser 
waterdues. In extending the wheatbelt northwards^ it is again 
not one ideal variety which is required. In some places the winter 
is extremely rigorous but not too long, at other places the 
suninierseason 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 Aar onsqn inPalestine 
might prove usefull in dry countries, if only as carriers of usefiiU 
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 mau 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. Lt 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 diflferences, 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 thiuk all experinienters with agricuhiiral i)l;iuts Imvo 
