WATER SOILS. 



227 



topics : The development of scientific agriculture, the value of a chem- 

 ical analysis, the origin of soils, the composition of soils, the inorganic 

 soil constituents, description of the organic soil elements, distinction 

 between nitrogen and ammonia, seaweed as a source of nitrogen, the 

 inorganic soil elements, the effect of lime on soils, explanation of the 

 different forms of phosphoric acid, tbe home manufacture of acid phos- 

 phate, the classification of soils, influence of mechanical condition on 

 soil fertility, average weight of different types of soil, humus and its 

 influence on soil fertility, peninsular soils deficient in humus, legumi- 

 nous crops — beggar weed and velvet bean, nitrification and rotation 

 of crops, irrigation and drainage, and effects of subsoiling. 



The second part is devoted to analyses by the author and his assist- 

 ant, J. P. Davies, of pine, hammock, and sand soils and subsoils, show- 

 ing coarse earth, fine earth, humus, nitrogen, and moisture at 100° C, 

 and water and organic matter and the mineral constituents in the fine 

 earth. The principal results are given in the following table: 



Important soil ingredient* in the soils of the central avd southern portions of the Florida 



peninsula. 



County. 



Nitrogen. 



Calcium 

 oxid. 



Brevard 



Dade 



DeSoto 



Hillsl >oro 



Lee 



Marion 



Orange 



Osceola 



Pasco 



Polk 



Volusia 



Average 



1951 

 8197 

 4032 

 4256 

 2740 

 4975 

 4202 

 4472 

 4682 

 4305 

 2000 

 3085 

 4155 

 6090 

 4818 

 2060 

 8857 

 4261 

 4670 

 7362 

 6082 

 9472 

 4830 

 2190 

 3950 

 3590 

 9165 

 5205 

 3022 

 6618 

 0852 



2.51 

 1.48 

 .26 

 .22 

 .40 

 1.36 

 .30 

 1.73 

 1.37 

 .80 

 .93 

 .63 

 .88 

 .45 

 .25 

 .14 



95. 9876 



.67 

 .70 

 .87 

 .97 

 .02 

 .50 

 1.15 

 .47 

 .35 

 .29 

 .15 

 .25 



Per cent. 

 0. 0378 

 .0252 

 .0434 

 . 0091 

 .0021 

 .0261 

 . 0364 

 .0833 

 .0084 

 .0112 

 .0497 

 .0672 

 .0518 

 .2464 

 .1162 

 .0714 

 . 0630 

 . 0350 

 .0074 

 . 029 1 

 . 0028 

 .0014 

 .1100 

 . 0266 

 .0252 

 .0434 

 .0406 

 .0042 

 .0126 

 . 0204 

 .oust 

 . 0098 

 . 0084 

 . 0266 

 .0280 

 .0890 



.0413 



Per cent. 



0. 2100 

 .1075 



4. 8787 

 .0200 

 .0000 

 .1150 

 . 0200 

 .0850 

 .3025 

 .0362 

 .0537 

 .1375 

 .1450 



3. 3025 

 .0000 

 .0725 

 .0000 

 .0350 

 . 0962 

 .0137 

 .0000 

 . 0000 

 .0624 

 .0112 

 . 0075 

 . 0300 

 .0850 

 .0000 

 .0125 

 . 112". 

 .0212 

 .0062 



. oooo 

 .0437 

 .11222 

 .0526 



. 2805 



Similar analyses are given of 11 samples of muck soils taken at 

 depths of from in. to 4 ft. 

 The analyses show that the pine, hammock, aud sand soils are essen- 

 G216— No. 3 3 



