444 
Journal of Agricultural Research 
Vol. I, No. s 
The greater danger of injury from frost that might result from forcing 
trees into bloom earlier than normal would have to be taken into con¬ 
sideration in making practical use of nitrate spraying in winter. 
Aside from the effect on crop production, there has also been a very 
noticeable improvement in the color, abundance, and vigor of the foliage, 
and it seems possible that nitrate spraying of dormant trees may be a 
valuable supplement to the ordinary fertilizer practices in obtaining 
quick results in orchards suffering from lack of nitrogen. 
The writers will make no attempt at present to explain the peculiar 
effect of nitrate of soda in increasing the production of more or less 
self-sterile varieties of fruits, or in improving foliage growth. The 
similarity between the writers' results in forcing dormant buds by 
winter nitrate spraying and the results obtained by other investigators 
by treating cuttings with various weak solutions has been mentioned. 
In experiments of the writers, however, a more or less lasting effect on 
the vigor of the foliage and also some valuable results in increasing crop 
production have been obtained. It furthermore appears that the effects 
obtained by spraying with a solution of nitrate of soda may continue 
over to the second year, as shown by the original plat of 1912, which was 
left unsprayed in the winter of 1913. 
The effects of the nitrate spraying seem to be proportional to the 
strength of the solution employed and the thoroughness with which 
it is applied. The addition of caustic soda materially increases this 
action. 
LITERATURE 
The following is a short list of some of the more recent literature on 
forcing the buds of dormant cuttings of woody plants. 
Jesenko, Franz. 
Einige neue Verfahren die Ruheperiode der Holzgewachse abzukurzen. Ber. 
Deut. Bot. Gesell., Bd. 29, Heft 5, p. 273-284, pi. 12,1911; Bd. 30, Heft 2, p. 81-93, 
pi. 3, 1912. 
liber das Austreiben im Sommer entblatterter Baume und Straucher. Ber. 
Deut. Bot. Gesell., Bd. 30, Heft 4, p. 226-232, pi. 9. 1912. 
Lakon, Georg. 
Die Beeinflussimg der Winterruhe der Holzgewachse durch die Nahrsalze. 
Ein neues Friihtreibeverfahren. Ztschr. f. Bot., Jahrg. 4, Heft 8, p. 561-582. 
1912. 
Weber, F. 
liber die Abkurzung der Ruheperiode der Holzgewachse durch Verletzung 
der Knospen, beziehungsweise Injektion derselben mit Wasser. Sitzber. K. 
Akad. Wiss. [Vienna], Math. Naturw. Kl., Bd. 120, Abt. 1, Heft 3, p. 179-194, 
pi. 1. 1911. 
