BORTI01 I.'l'l KK. 

 Proportions of different parts of the yautia plant. 



247 



The «• position of 2 samples of van tins determined al the Main.' Experiment Sta- 

 tion is compared with the composition of [rish potatoes and Bweel potatoes in the 

 following table* 



Composition ofyautias and potatoes. 



Yautia and potato 



Protein. 



Percent. Percent. 



White yautia 70.0 1.7 



Yellowyautia 70.0 2.5 



[rishpotato 7s .3 2.2 



Bweet potato 69.0 1.8 



Fat. 



Per o ni. 

 0.2 



.2 



.1 



.7 



Total carbohy 

 drates. 



Sugar, 



Btarch, 



etc. 



Per C( ni. 

 26.3 

 26. 1 

 L8.0 

 26. 1 



Crudi 

 Bber. 



Fuel 

 A-h. value per 

 pound. 



Per cent. 



0.6 

 .6 

 .4 



1.8 



P< ;■ a iii. Calories. 

 1 . 2 

 .6 

 1.0 

 1.1 570 



A sample of dried tubers of the Rolliza variety, analyzed by the Bureau of Chem- 

 istry of this Department, contained 29.17 per cent of starch and 62.25 per cent of 

 moisture. This is considered an exceptionally high percentage of starch, bul it has 

 been found in experiments with this variety that 20 to 25 per cent of starch is readily 

 obtained from fresh roots. The yield of starch per acre is estimated at from 8 to 15 

 tons, as compared with 5 to 1<) tons for cassava. Yautias dried and ground yield 

 about 30 per cent of flour ata cost of about 2 cts. per pound for the raw material. 

 Less than 5 per cent of the gross weight of the yautia tuber is lost in peeling. 



HORTICULTURE. 



Report of the horticulturists, F. A. Waugh and <i. ( >. Greene [Massachusetts 

 sin. /,'///. 1904, />/>■ 157-167, ihjm. 1). — Reports are here given on plums and the prun- 

 ing of | 'each trees. 



The report on plums deals principally with the behavior of a large number of varie- 

 ties grown at the station. Bradshaw has proved one of the best of the Domesticas 

 grown, while Burbank, of the Japanese sorts, has proved the most profitable and 

 productive market plum at the station. 



Experiments were made in marketing plums in 3-lb. baskets such as are used for 

 grapes. This proved a satisfactory package, as it furnished aboul the quantity of fruit 



desired by most purchasers. 



Plums for canning were packed in Jersey peach baskets holding I6qts. This proved 

 a satisfactory, cheap, and convenient package. Most markets were found not u> be 

 fastidious with respect to the form of the package used for plums, and any small 

 neat basket or box will answer If the fruit is of good quality and well packed. 



In pruning experiments with peaches one row has been left for9 years without 

 pruning. These trees are quite open-headed and have generally assumed a vase 



form. The lower part of the main branches i- hare and the fruiting w 1 is sparse, 



weak, and high np in the trees. The trees are much less thrifty and vigorous than 



