dnd this despite the fact that the soil in question is a Rhine-valley loam fairly 

 rich in potash. Best of all are the effects to be seen on bed No. 3, which received 

 lime alone. The application of lime here, has apparently had the effect of opening 

 up the store of potash in the soil, and has consequently, in the end, resulted in 

 more complete exhaustion. For this reason it has been deemed expedient to 

 publish the results of bed 3 for comparison. 



Signs of potash starvation are manifested by the five crops of the rotation in 

 varied degree: least of all by rye, somewhat more pronounced by sugar-beet, 

 more so still by oats, and clearest of all, by far, by peas and potatoes. These 

 differences are to be accounted for to some extent by the different needs of the 

 plants, and to some extent by the place of the crops in the rotation. Of the 

 plants cultivated for this experiment, the potato makes the strongest demand for 

 potash manuring, then come in descending order: peas, oats, sugar-beet and rye. 

 The appearance of signs of potash starvation is influenced, not only by the needs 

 of the plants, but also by their order in the rotation. Other things being equal, 

 more difficulty will be found in meeting the demand for potash, after crops such 

 as sugar beet, which have marked potash-procuring properties, than after potatoes, 

 peas etc. where such capacity for taking up potash is relatively limited. 

 The signs of potash starvation as shewn in the pictures are only in part charac- 

 teristic. No photographs of the rye plots have been reproduced, as there, apart 

 from a somewhat weaker growth, no typical signs of potash starvation were to 



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