518 Forestry Quarterly 



Out of the six parcels fertilized with superphosphate only four 

 showed superior results, in two the effect was less than the parcels 

 with bone meal. While at one station after three years the super- 

 phosphate plants were 19 per cent taller than the unfertiUzed, they 

 were only 1 per cent taller than the bone meal plants. The expla- 

 nation was found in the washing of the soil combined with the 

 greater solubility of the superphosphate, and hence leaching out. 

 At the station Mariabrunn, with the lowest precipitation and no 

 washing, the results were most favorable for the superphosphate, 

 being in the two years 40 and 35 per cent greater than the bone 

 meal plants. Tentatively, the conclusion is drawn that in the first 

 year the vegetative efif jct of superphosphate on spruce seedlings is 

 mostly greater than of bone meal, while in the next year the effect 

 of both fertilizers in rainy localities is very nearly alike, and in 

 very humid stations the effect of superphosphate is less. On dry 

 soil superphosphate appears continually superior to bone meal. 



Ein Dilngungsversuch im forsUichen Pflanzgarten. Centralblatt fur das 

 gesammte Forstwesen, May- June, 1915, pp. 173-9. 



Four coniferous species were introduced 



Behavior on a large scale in Denmark about 150 



of years ago. They have shown varying 



Exotics behavior. Larix europaea has found a home 



in many places, but has also disappeared 



from localities where plantations had been made. Pinus silvestris 



wherever planted in original forest ground has done well, but 



plantations on the heath have disappeared during early or middle 



life. Picea excelsa has established itself thoroughly wherever 



planted, on the heath as well as elsewhere. Abies pectinata was 



introduced in 1764. It appears only in larger, isolated groups. 



Its best development is found on the island of Bornholm, where 



the absence of deer and elk is a factor in its favor. Several sample 



plots, the details of measurements having been taken every 5 



years from 1872 to 1896 and tabulated, show that its growth 



compares well with I and II sites in the Black Forest. 



J. A. L. 



Edelgranens Voekst paa Bornholm. Det Forstlige Forsogsvaesen i Danmark, 

 Vol. IV, No. 1, 1913. 



