■Some Observations on Manuring -with Bone-dust. 



107 



On Nov. 4, 1904, bone dust, magnesit, limestone, gypsum, and ferric 

 hydrate,^^ were applied to the respective pots ; and a part of the soluble 

 nutrients the next day in solution, the rest Feb. 20. 



On December 12, the young plants of sixsided barley of about 6 cm. 

 were transplanted, each pot receiving three bundles, each consisting of three 

 plants. During vegetation, the plants of the pots B and E showed a most 

 luxuriant development and a dee/f green color, while those of the other 

 pots showed a poor growth and a somewhat pale color ; the poorest of all 

 were the plants in E. The following table shows the height of plants, and 

 numbers of stems and ears : 



I). The ferric hydrate was freshly precipitated and applied in suspension. 



