Water 55.732 Organic matter* 39.408 Mineral matter, (ash) 4.860 ------- 100.000 ======= * Containing nitrogen .792 Equal to ammonia .901 “The roots on the spot where the clover was very bad, yielded only 31 lbs. of nitrogen per acre, or scarcely one-third of the quantity which was obtained from the roots where the clover was good. “The soil from the second square yard, on analysis, was found, when freed from stones by sifting, to contain in 100 parts: Composition of Soil, No. 2. (Bad Clover). Water 17.24 Organic matter* 9.64 Oxide of iron and alumina 11.89 Carbonate of lime 14.50 Magnesia, alkalies, etc. 1.53 Insoluble silicious matter 45.20 ------- 100.00 ======= 2d determination. * Containing nitrogen .306 .380 Equal to ammonia .370 .470 “Both portions of the clover-soil thus contained about the same percentage of organic matter, and yielded nearly the same amount of nitrogen. “In addition, however, to the nitrogen in the clover-roots, a good deal of nitrogen, in the shape of root-fibres, decayed leaves, and similar organic matters, was disseminated throughout the fine soil in which it occurred, and from which it could not be separated; but unfortunately, I neglected to weigh the soil from a square yard, and am, therefore, unable to state how much nitrogen per acre was present in the shape of small root-fibres and other organic matters. “Before mentioning the details of the experiments made in the next season, I will here give the composition of the ash of the partially cleaned clover-roots: Composition Of Ash Of Clover-Roots, (Partially Cleaned). Oxide of iron and alumina 11.73 Lime 18.49 Magnesia 3.03 Potash 6.88 Soda 1.93 Phosphoric acid 3.61 Sulphuric acid 2.24 Soluble silica 19.01 Insoluble silicious matter 24.83 Carbonic acid, chlorine, and loss 8.25 ------ 100.00 ======