44 



plants which are aflFected by the carbonate of hme is due to the same 

 change in ash composition. In fact, some quite marked changes in 

 ash composition, as the decrease of iron in bush beans, occur without 

 affectmg the growth. Aird some depressions in growth occur, as 

 sugar cane on Plat III, with practically no change in ash composition. 

 But those plants wliich showed the greatest injury from the calcareous 

 soils, pineapples and rice, showed the most marked changes in their 

 ash. The significant changes in the ash composition of these plants 

 were apparently the increase in Ume and decrease in iron. 



StTMMABY. 



The residts show, in a soil well suppUed with nitrogen, phosphoric 

 acid, and potash, the effect of 5, 18, and 35 per cent of carbonate of 

 lime upon the growth and ash composition of bush beans, soy beans, 

 sunflowers, radishes, sugar cane, sweet cassava, rice, and pineapples. 



The growths of bush beans and radishes were unaffected even by 

 35 per cent of CaCOj. The growths of smiflowers, soy beans, and 

 sugar cane, were somewhat depressed by IS per cent of CaCOj; the 

 growth of sweet cassava was somewhat depressed by 5 per cent of 

 CaCOg and markedly by 35 per cent of CaCOg; the growths of rice and 

 pineapples were markedly depressed -vvith the appearance of chlorosis, 

 by 5, 18, and 35 per cent of CaCOg. 



The carbonate of hme apparently had no effect on the amount of 

 nitrogen, potash, and phosphoric acid contained in the various plants, 

 but did increase shghtly the total carbon-free ash in aU the plants 

 except rice, and modified either the amount of Hme, magnesia, or iron 

 in the ash of all the plants. 



On the calcareous soils the Ume in the ash of bush beans was not 

 increased, but there was a shgiit increase in the amount of hme in the 

 ash of soy beans, sunflowers, and sugar cane. On the plat with 5 per 

 cent of carbonate of hme, the hme in the ash of rachshes was increased 

 about 17 per cent, but on the plats with IS and 35 per cent of carbon- 

 ate of hme the increases of hme in tlie ash of this plant were progres- 

 sively less. On the plat with 35 per cent of carbonate of Ume the 

 amount of Ume in the ash and dry substance of sweet cassava was 

 markedly increased. On all the calcareous soils the amount of Ume 

 in the ash and dry substance of rice and pineapples was greatly 

 increased. 



Some plants whose growth was little affected by the carbonate of 

 lime (bush beans, soy beans, radishes, and sunflowers) showed marked 

 decreases in the amount of iron or noticeable decreases in the amount 

 of magnesia in the ash, when grown on the calcareous soils. 



The plants whose growths were most depressed on tlie calcareous 

 soils (rice and pineapples) showed the greatest increases in the amount 



