332 Reiport of the Horticultural Depa.rtment of the 



fertilizers wns tried upon both kinds of soil.^® The clay loam 

 was composed of rotted sod from an uncultivated field. The 

 sandy loam was from the side of a cultivated field where part of 

 it had been drifted by winds. It could not support nearly so 

 heavy a sod as the clay loam, and contained less humus and 

 also less nitrogen, phosphoric acid and potash, as the following 

 analyses show. These analyses were made by Messrs. VV^. H. 

 Andrews and A. D. Cook. 



Table I. — Analyses of the Clay Loam and the Sandy Loam. 



(aik dried samples.) 



Nitrogen. Phosphoric acid. Potash. 



SoiL (N.) (PaO.) (K,0.) 



Per ct. Per ct. Per ct. 



Clay loam 0.215 0.075 0.4G9 



Sandy loam 0.052 0.0G7 0.121 



NPrROGBNOUS FERTILIZERS TE:STE'D. 



In these tests organic nitrogen was used in the forms of stabh^ 

 manure and dried blood, and inorganic nitrogen in the forms of 

 nitrate of soda and sulphate of ammonia. These are among- the 

 most important nitrogenous fertilizers of commerce. The chem- 

 ical fertilizers just mentioned were tried both with and without 



""These soils were similar to those used in the work of 1S97-8, air-dried 

 samples of which, as determined by official methods, gave the following 

 analyses. (See Bui. 146 and Ann Rept. 1898.) 



Tablb a. — Chemical Analyses of Clay Loam and Sandy Loam. 



(CROP OF 1S97-8.) 



Phos- 

 phoric 



Moistnre. Nitrogen. acid. Potash Lime. Organic 



Soil. (H„0.) (N.) (PjO^.) (KjO.) (CaO.) matter. 



Per ct. Per ct. Per ct. Per ct. Per ct. Per ct. 



Clay loam 13.3 .237 .067 .518 1.022 7.81 



Clay loam, water-free 0. .236 .077 .368 1.179 9.01 



Sandy loam 14.0 .075 .111 .083 .313 2.68 



Sandy loam, water-free 0. .087 .129 .097 .399 3.12 



Table B.— Mechanical Analyses of Clay Loam and Sandy Loam. 



(CROP OF 1897-8.) 



Clay Loam. Sandy loam. 



Per ct. Per ct 



Fine gravel 3.38 0.51 



Coarse sand 5.20 0.69 



Medium sand .'.... 20.71 9.49 



Fine sand 43.45 77'5o 



Very fine sand .94 2 44 



Silt 7.96 1.60 



Pine silt 1.64 1.23 



Clay 9.86* 3.79t 



Organic matter 7.02 2.75 



♦Including 1.39 unsettled clay, t Including 1.03 unsettled clay. 



