1W9J HORTICULTURE. 447 



More success has been obtained with the rough lemon and the sweet orange 

 than with any other kind of stock. The lemon has been proved suitable for 

 practically all of the many varieties of oi'anges which have been worked on it. A 

 tendency to the production of a slightly elongated shape of orange has been 

 observed as distinct froiif the rounder form presented by the same variety of 

 fruit when budded on sweet orange. The flavor of the fruit on the older trees 

 budded on lemon stock is equally as good as that grown on sweet orange stock, 

 but with younger trees there is a slight indication of lemon flavor in the 

 oranges. The skin of the Washington Navel fruit from young trees grow- 

 ing on rough lemon stock is rougher than with fruit grown on any other stock. 

 At 10 years old no outward difference can be observed, but the skin is, as a 

 rule, slightly thicker than when sweet or trifoliate roots have been used. The 

 use of rough lemon stock does not appear to influence the coloi% size, weight, or 

 juice content of the fruit. No instance of root-rot has been met with either on 

 rough lemon or any other stock. 



All the different varieties worked on sweet lime root have suffered badly from 

 chlorosis. In addition, this stock has almost as much of a dwarfing effect as 

 trifoliate. Bitter Seville and Florida sour oranges are classed as useless for 

 nursery purposes under soil conditions existing at the experiment stations. No 

 success has been nfet with in the use of the shaddock and pomelo as budding 

 stock. Trifoliata roots have a marked dwarfing effect upon practically all 

 sweet oranges excepting Valencia Late and De Roi, and are not recommended 

 for general use. 



Fertilization of citrus groves during period of hig'h-priced fertilizers, 

 J. A. Prizer (Cal. Citrogr., 4 {1919), No. 9, pp. 231, 255, fig. 1).—A contribution 

 from the California Citrus substation, in which the author presents a fertilizing 

 program for citrus growers, with special reference to the conservative use of high- 

 priced commercial fertilizers. 



Past and new practices in growing coconuts, P. C. van der Woxk (Cultura, 

 31 (1919), No. 369, pp. 153-182).— A paper on this subject read before the 

 Tropical Agricultural Society at Wageningen, in which the author points out 

 the importance of the coconut industry to the Netherlands Indies, discusses 

 native methods of growing coconuts, and suggests new cultural practices based 

 on his investigations of the coconut palm previously noted (E. S. R., 39, p. 244). 



Contribution to the study of tea in Indo-China, P. Eberhardt and Axtfray 

 {Bui. Econ. Indochine, n. ser., 21 {1918), No. 133, pp. 999-1023, pis. IS).— A re- 

 view of the present status of tea culture in Indo-China, including analyses of 

 various samples of tea from Laos, Tonkin, and Annanf. 



Abnormal growth of scion in relation to stock in some cultivated almonds, 

 N. Passerini {Bui. Soc. Bot. Ital., No. 1 {1919), pp. 8, 7, fig. i).— An illustrated 

 description with circumference data is given of almond trees growing on the 

 grounds of the Agricultural Institute of Scandicci, Florence, Italy. In these 

 the scions have not only greatly overgrown the stocks but have tended to in- 

 crease the circumference of the stocks in the region of the graft over that at 

 the base of the trees. The normal fruiting of the trees, which are about 25 

 years of age, has not been interfered with by the abnormal development of the 

 graft. 



The butternut and the Japan walnut, W. G. Bixby {Amer. Nut. Jour., 10 

 {1919), No. 6, pp. 76-79, 82, 83, figs. 11).— As a result of requests sent out for 

 superior butternuts the author received specimens from various parts of the 

 country, many of which were rough-shelled Japan walnuts so near like butter- 

 nuts as to be readily mistaken for them, and some of which were sent in as 

 butternuts. An examinatioQ of the evidence now at hand leads to the conclu- 



