354 



THE MONTHLY BULLETIN. 



normally favorable conditions. These data so far as they relate to crops entering 

 into human consumption are reproduced in the first column of the table below : 



Table Showing the Total Farm Products as Sold, the Fresh Portion as 'Normally 

 Used for Human Food, and the Total Dry Matter Contained in the Edible 

 Portion, Based on the Estimated Safe Yield in California. (The figures are 

 not official.) 



Sugar beets 



Prunes, dried 



Grapes, shipping 



Potatoes 



Apples _. 



Onions 



Oranges — 



Plums, shipping . 

 Pears, shipping __ 

 Apricots, dried _. 

 Peaches, dried .— 



Rice 



Beans 



Raisins — muscats 



Olives, ripe 



Oats 



Barley 



Wheat 



Cherries 



Lemons 



Almonds 



Walnuts 



Notes. 



In the absence of satisfactory data, estimates have been made in the following 

 items : 



Barley Flour. We believe that you should use the figure that we gave you for barley 

 flour (45%), as that represents the maximum amount of human food material or 

 barley flour that we have been able to produce from the whole barley (Sperry 

 Flour Co.). 



Potatoes. Atwater's data gives 80% edible ; 85% seems better. 



Lemons. Estimate of juice only (Colby. 35%). Lemon juice (Atwater) is 2.3% 



sugar, 7.5% citric acid, edible 9.8%. 10% dry matter used in table. 

 Grapes. (Bioletti) 95% edible. 

 Prunes. (Colby) 86.5% edible. 

 Plums. Howard states shipping crates contain 20 to 22 pounds. An average of 21 



used in the calculations, making an acre yield 7,350. 



Howard's estimate of edible portion 97.5 to 9S%. Our own figures from a small 



number of two varieties, 94.0 and 97%. Used in table, 96%. 

 Pears. Atwater's figure, 90%; Howard's figure, 95%; average 93%, used in the table. 

 Cherries. Our own and Howard's figures agree to 89% edible. 

 Walnuts. (Atwater) 42% edible. 

 Almonds. (Taylor) 50% edible. 



The data in the first column need not be accepted as final. At best they are only 

 estimates. If they are 50 per cent too high, or equally low, then the data in the 

 Ia9t two columns are also. In any case it is believed that the figures are comparable. 



Certain important crops have been omitted from the table because they are not 

 directly the source of human food. Some of these, however, are indirectly quite 

 important. For example, True reports that in feeding investigations at the Uni- 

 versity Farm, the average production of four cows during seven periods of lactation 

 when fed exclusively on alfalfa was 1,167.7 pounds of milk per ton. By actual 

 analysis the total solids were 12.8 per cent, or 149.1 pounds, and 4.13 per cent of 

 butter fat, or 48.3 pounds. On the basis of five tons of alfalfa per acre, the acre 



