142 BULLETIN OF THE BUSSEY INSTITUTION. 
portion as the amounts of potash that are contained in them. It 
will be noted that the difficultly soluble potash of the New Jersey 
green sand did little good. Like the experiments made in glass jars, 
reported on page ‘65 of this Bulletin, the results of the field experi- 
ments enforce the lesson that moisture must be present in order that 
the green sand shall produce its proper effect. 
Upon the ruta-bagas also the action of the potassic fertilizers, even 
those that contained neither phosphoric acid nor nitrogen, was, com- 
paratively speaking, excellent ; but as in the previous years, it is the 
bean crops that have furnished the most trustworthy and the most 
interesting results. In accordance with the proverbial ability of this 
crop to prosper upon poor land, the beans suffered much less than 
either of the other crops from the hardships to which they were 
exposed. The results obtained with them are consequently tolerably 
uniform, and in general easily comprehensible. Several conclusions 
are, moreover, plainly indicated by the record of these results ; but 
that even the hardy bean crop was most decidedly checked and 
hampered by the drought, and that it felt severely the limitations 
imposed by the adverse circumstances to which it was exposed, is 
clearly shown by the comparatively small differences between the 
crops harvested from square BB 4, where three bushels, equal to 
about 65 kilogrammes of wood-ashes, gave 6.610 kilogrammes of 
beans, and from B4, where 4.095 kilogrammes of wood-ashes gave 
4.734 kilogrammes of beans. In like manner, BB 6, treated with 
1.336 kilogrammes of pearlash, gave 4.561 kilogrammes of beans ; 
and B 6, that got only 307 grammes of the pearlash, gave 4.021 kilo- 
grammes of beans. BB 7, to which 2.267 kilogrammes of sulphate of 
potash were applied, gave only 4.322 kilogrammes of beans, against 
4.612 kilogrammes obtained from B 7, that received only 307 
grammes of the sulphate. In view of all this, and of the fact that 
the results just cited are as good or better than those obtained from 
adjacent squares heavily dressed with farm-manure, it is evident, as 
has been said already, that something besides the mere fertilizers was 
needed in order that the beans might really flourish upon the soil of 
this particular field. 
