Weight per Produce in grain. bushel. Produce in straw. Acre. bushels. lb. lb. stones. lb. First 41 19 61-1/2 152 of 22 Second 42 38 61-1/2 160 of 22 _Wheat grown with Covered Manure._ First 53 5 61 220 of 22 Second 53 47 61 210 of 22" NOTE XV. (pp. 231, 264). DRAININGS OF MANURE-HEAPS. The importance of not separating the liquid portion from the solid portion has already been pointed out in dealing with the composition of the solid excreta and the urine. These two constituents of the manure are complementary to one another, and the value of farmyard manure as a general manure is very much impaired if the liquid portion is not applied along with the solid. In one important respect do the drainings of manure-heaps differ from urine--that is, in the percentage of phosphates they contain, the latter being practically devoid of phosphoric acid. The following is an analysis of drainings from a manure-heap (Wolff):-- Dry substance 18.0 | Magnesia 0.4 Ash 10.7 | _Phosphoric acid_ 0.1 Nitrogen 1.5 | Sulphuric acid 0.7 Potash 4.9 | Silica 0.2 Lime 0.3 | NOTE XVI. (p. 270). AMOUNTS OF POTASH AND PHOSPHORIC ACID REMOVED BY THE FOLLOWING ROTATIONS FROM A PRUSSIAN MORGEN (.631 ACRE). Potash. Phosphoric acid. lb. lb. 1. Wheat 16.40 10.67 Oats 10.47 4.59 Potatoes 66.41 18.33 Hay 39.54 11.32 ------ ----- 132.82 44.91 ------ ----- The ratio of potash to phosphoric acid is 2.96 to 1. 2. Wheat 16.90 10.67 Barley 17.44 10.65 Potatoes 66.41 18.33 Hay 39.54 11.32 ------ ----- 140.29 50.97 ------ ----- The ratio of potash to phosphoric acid is 2.76 to 1. 3. Rye 20.03 12.15 Oats 10.97 4.59 Potatoes 66.41 18.33 Hay 39.54 11.32 ------ ----- 136.95 46.39 ------ ----- The ratio of potash to phosphoric acid is 2.95 to 1. 4. Wheat 16.90 10.67 Oats 10.97 4.59 Mangels 148.54 25.62 Hay 39.54 11.32 ------ ----- 215.95 52.20 ------ ----- The ratio of potash to phosphoric acid is 4.13 to 1.