FARM DRAINAGE. 



185 



total of 175 died. What was the percentage of trees that 

 died? 



659. On land that had not been tiled 49 trees out of 91 

 died. What was the percentage of trees that died? 



660. This same farmer reports that the trees on the 

 tiled land yielded 50 per cent more fruit than those on 

 the untiled land. If 30 trees were growing on each acre, 

 what is the difference when there is a yield of 10 bushels 

 a tree where no tiling was done ? 



OLD LAND REMADE BY DRAINAGE. 



This land was formerly hardly worth the taxes. It was reclaimed by drain- 

 age. Note the excellent crop of beans in the foreground and corn in the back- 

 ground. 



661. What is the money gain an acre by tiling when 

 apples are worth 50 cents a bushel ? 



662. Suppose five acres, 30 trees per acre of apple 

 trees, are planted on tiled land, and five acres, 30 trees 

 per acre, planted on untiled land. On the tiled land 14 

 per cent of the trees die, while on the untiled land 54 per 

 cent die. For 20 years the average annual production of 

 apples per living tree on untiled land is eight bushels, and 

 on the tiled land 50 per cent more. What is the produc- 

 tion of apples in bushels for each five acres during 20 

 years' time? 



