Abstract
IT is a well-known fact that, by selection or hybridisation, varieties of any one plant can be produced which differ markedly in their yielding capacity. It is generally undecided as to what this difference of yielding capacity is due, and although yielding capacity of plants is controllable by manuring, it is not known whether the increase in yield gained in this way is a function only of the manure added, or whether different varieties respond to varying extents to the manurial combinations given. Interesting results were obtained in an investigation which has been carried out to test the efficiency in the use of manures by five well-known varieties of barley. Eleven manurial combinations consisting of different amounts of phosphate, nitrogen, and potash were used. The experiments were done in pot culture, using pure sand and solutions of pure chemicals. Each manurial combination was replicated seven times, giving in all 385 pots. The manurial scheme is tabulated below. The varieties used were Goldthorpe, Plumage, English Archer, Plumage Archer, and Spratt Archer.
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GREGORY, F., CROWTHER, F. Differential Response of Barley Varieties to Manuring. Nature 121, 136 (1928). https://doi.org/10.1038/121136a0
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DOI: https://doi.org/10.1038/121136a0
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