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By Arthur Geoffrey Norman

Moving into the expansion and creation of soybeans? Soybean body structure, Agronomy, and usage via Arthur Geoffrey Norman is a smart starter advisor and reference handbook for an individual drawn to soybean administration, development, breeding, assimilation, processing, and usage.

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Extra resources for Soybean Physiology, Agronomy and Utilization

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J. 68, 513-517. Epstein, E. (1956). Annu. Rev. Phnt Physiol 7, 1-24. Erickson, Ε. H. (1975). Crop Sci. 15, 84-86. Garcia, L. , and Hanway, J. J. (1976). Agron. J. 68, 653-657. Gilbert, S. , and Shive, J. W. (1942). Soil Sci. 53, 143-152. Gilman, D. , Fehr, W. , and Burris, J. W. (1973). Crop Sci. 13, 246-249. Goodchild, D. J . , and Bergersen, F. J. /. Bacteriol 92, 204-213. Grabe, D. , and Metzer, R. B. (1969). Crop Sci. 9, 331^333. Grable, A. , and Danielson, R. E. (1965). Soil Set. Soc. , Proc.

Grafted plants were field-grown to maturity. Seed yield and number of seeds per plant were increased by multiple shoots, but multiple roots caused an even greater seed yield and number of seeds per plant. Leaf area and leaf number per plant, determined during the early reproductive growth stage, were increased by multiple shoots and, increased to a greater extent by multiple roots. At this developmental stage, however, the dry weight shoot:root ratio was nearly the same (approximately 10:1) for all grafting treatments.

The ability of roots to penetrate the soil is negatively related to soil compaction (Zimmerman and Kardos, 1961). , 1976). Wheel 38 Dale R. Hicks traffic on both sides of a soybean row causes 30% fewer nodules and 3 6 % less mass than in rows with wheel traffic on only one side. Compaction also reduces nodule mass in the upper 30 cm of the soil profile. Nelson et al. (1975) studied the effect of compaction of a sandy loam soil on the soybean root system and seed yield. Resistance to penetration increased, the root systems were restricted and seed yields were reduced by all compaction treatments compared with no compaction.

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