Figure 5. P uptake, timing, and distribution in the soybean plant. (Modified from Hanway and Weber, 1971)
Soybean Side-Dress Results and Discussion Once again physiological measurements and visual observations had us convinced that the treatments with zinc were going to be the top yielding treatments. In fact, a month after application physiological measurements were taken and the treatment that looked the best overall was the 10-34-0+Zn+Terrimar. Data in Figure 6, from the July 25 th data collection of physiological measurements, suggests that the addition of the zinc will lead to more yield. In general, the physiological measurements of plant height, number of nodes, and number of branches are good indicators of yield for soybeans. Furthermore, at each of the 3 field days in August and September, visual examination of the treatments indicated similar findings as the physiological measurements.
Percent change from the untreated check.
10-34-0
10-34-0+Zinc
10-34-0 + Zinc + Terramar
10-34-0 +Zinc + QLF Boost
Crop Height Number of Nodes Number of Branches
3.35
5.03
10.14 80.43
6.34
35.23
48.22
24.38
7.04
11.84
27.50
11.83
Figure 6 Percent change from the untreated check from physiological measurements taken in season on July 25, 2022.
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