AMOUNTS OF SELECTED CONSTITUENTS IN THIRTY BUSHELS OF WHEAT AND ITS PROPORTION OF STRAW. _____________________________________________________ | | | | | |Nitrogen.|Phosphoric| Potash. | Lime. | | | Acid. | | | | | | | | +---------+----------+---------+---------+ | | | | | Straw. | 11.20 | 2.67 | 13.76 | 6.20 | Flour. | 22.17 | 2.76 | 1.62 | 0.39 | Middlings. | 3.15 | 2.01 | 0.72 | 0.06 | Shipstuff. | 1.68 | 1.32 | 0.63 | 0.09 | Bran. | 6.84 | 7.53 | 2.49 | 0.36 | +---------+----------+---------+---------+ Totals. | 45.04 | 16.29 | 19.22 | 7.10 | ____________|_________|__________|_________|_________| From numerous investigations it has been found that in regard to the nitrogen and the ash constituents, there is striking evidence of the much greater influence of season than of manuring on the composition of a ripened wheat plant, and especially of its final product--the seed. Further, under equal circumstances the mineral composition of the wheat grain, excepting in cases of very abnormal exhaustion, is very little affected by different conditions as to manuring, provided only that the grain is well and normally ripened. Again, it is found that the composition may vary very greatly with variations of season, that is, with variations in the conditions of seed formation and maturation, upon which the organic composition of the grain depends. In other words, differences in the mineral composition of the ripened grain are associated with differences in its organic composition, and hence the great value of proper selection both for seed and for milling purposes. AMERICAN WHEATS.