Some effects of successive cropping to barley
1917
Gericke, W.F.
In an experiment to determine some of the effects of continuous cropping of a soil under greenhouse conditions, barley was grown in pots, the successive crops being grown concurrently in order to eliminate as much as possible such factors of differences as climate and season. Plants of the fourth crop matured with greater uniformity than those of any of the other crops. There were no barren stalks in the plants of the fourth crop. The number of tillers and barren stalks increased with the plants grown in the soil of a lesser number of crops. The total height of all the stalks produced decreased with each successive crop, but the average height of the individual stalks increased with each successive crop. In the fourth and the third crops the heavist grain, both as to weight per head and as to average weight per kernel, varied with the height of the stalks. The tallest stalks produced the largest heads and the largest average weight per kernel. In the second and first crops no correlation between the height of stalks and weight of grain per head, or average weight per kernel, was obtained.
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