Spectrum Analytic Inc
1087 Jamison Rd
Washington Court House, OH 43160
(800) 321-1562
1087 Jamison Rd
Washington Court House, OH 43160
(800) 321-1562
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| library:articles:soybean_growth 2010/02/23 15:54 | library:articles:soybean_growth 2010/03/30 15:29 current | ||
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| - | Table 20 shows nutrient uptake requirements for soybeans under maximum economic yield conditions at various stages of growth, based on research by - Dr. Ray Flannery, who raised 101 bu/A soybeans in 1986. The research was performed on a Freehold sandy loam soil, testing very high in P and K, with a pH of 6.0 to 6.5. Total nutrient applications were 150 lbs/A N, 200 lbs/A P<sub>2</sub>O<sub>5, </sub>and 300 lbs/A K2O applied preplant, and two fertigations. Figure 13 shows nutrient storage in plant parts at the green stage of development. | + | Table 20 shows nutrient uptake requirements for soybeans under maximum economic yield conditions at various stages of growth, based on research by - Dr. Ray Flannery, who raised 101 bu/Ac soybeans in 1986. The research was performed on a Freehold sandy loam soil, testing very high in P and K, with a pH of 6.0 to 6.5. Total nutrient applications were 150 lbs/Ac N, 200 lbs/Ac P<sub>2</sub>O<sub>5, </sub>and 300 lbs/Ac K<sub>2</sub>O applied preplant, and two fertigations. Figure 13 shows nutrient storage in plant parts at the green stage of development. |
| {{:library:articles:soybean_growth:image002.jpg|}}\\ | {{:library:articles:soybean_growth:image002.jpg|}}\\ | ||
| - | Figure 13. Illustrates the plant parts in which the nutrients are stored at the green stage of development. (See Table 20) | + | Figure 13. Illustrates the plant parts in which the nutrients are stored at the green stage of development. |
| ^ Table 20: Dry Matter Accumulation and Nutrients Absorbed Per Acre by Soybeans at Various Growth Stages ||||||| | ^ Table 20: Dry Matter Accumulation and Nutrients Absorbed Per Acre by Soybeans at Various Growth Stages ||||||| | ||
| - | ^ Growth Stage ^ (2) Three Tri-leaf ^ (3) Six Tri-leaf ^ (5) Full Bloom ^ (7) Pod Dev. ^ (9) Soft Green ^ (10) Mature | | + | ^ Growth Stage ^ (2) Three Tri-leaf ^ (3) Six Tri-leaf ^ (5) Full Bloom ^ (7) Pod Dev. ^ (9) Soft Green ^ (10) Mature | |
| - | ^ Days ^ 40 ^ 51 ^ 67 ^ 82 ^ 103 ^ 119 | | + | ^ Days ^ 40 ^ 51 ^ 67 ^ 82 ^ 103 ^ 119 | |
| ^ ^ Lbs/Acre |||||| | ^ ^ Lbs/Acre |||||| | ||
| - | | Dry Matter | 784 | 1585 | 4757 | 9495 | 16,900 | 16,594 | | + | | Dry Matter | 784 | 1585 | 4757 | 9495 | 16,900 | 16,594 | |
| - | | N | 30 | 46 | 171 | 308 | 548 | 494 | | + | | N | 30 | 46 | 171 | 308 | 548 | 494 | |
| - | | P<sub>2</sub>O<sub>5</sub> | 6 | 12 | 40 | 74 | 132 | 112 | | + | | P<sub>2</sub>O<sub>5</sub> | 6 | 12 | 40 | 74 | 132 | 112 | |
| - | | K<sub>2</sub>O | 27 | 57 | 149 | 293 | 433 | 397 | | + | | K<sub>2</sub>O | 27 | 57 | 149 | 293 | 433 | 397 | |
| - | | Ca | 11 | 20 | 49 | 101 | 152 | 165 | | + | | Ca | 11 | 20 | 49 | 101 | 152 | 165 | |
| - | | Mg | 4 | 8 | 20 | 34 | 55 | 56 | | + | | Mg | 4 | 8 | 20 | 34 | 55 | 56 | |
| - | | S | 2 | 3 | 11 | 20 | 32 | 28 | | + | | S | 2 | 3 | 11 | 20 | 32 | 28 | |
| - | ^ ^ ^ Micronutrient uptake (lbs/Acre) ||||| | + | ^ ^ ^ Micronutrient uptake (lbs/Acre) |||| |
| - | ^ ^ ^ Mn ^ Fe ^ Cu ^ B ^ Zn | | + | ^ ^ Mn ^ Fe ^ Cu ^ B ^ Zn ^ |
| - | | Near Maturity | 1.03 | 6.32 | 0.12 | 0.08 | 0.74 | | + | | Near Maturity | 1.03 | 6.32 | 0.12 | 0.08 | 0.74 | |
| Source: Dr Roy Flannery | Source: Dr Roy Flannery | ||
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| As a consequence, the potassium needs are about twice as great as the phosphorus needs. However, only about half of the phosphorus and potassium needs are for the vegetative growth, whereas the balance is for seed development. Soybeans remove about 0.80 pounds of P<sub>2</sub>O<sub>5 </sub>and about 1.40 pounds K<sub>2</sub>O per bushel of yield harvested. | As a consequence, the potassium needs are about twice as great as the phosphorus needs. However, only about half of the phosphorus and potassium needs are for the vegetative growth, whereas the balance is for seed development. Soybeans remove about 0.80 pounds of P<sub>2</sub>O<sub>5 </sub>and about 1.40 pounds K<sub>2</sub>O per bushel of yield harvested. | ||
| - | ^ Early Soybean Growth and Development || | + | ^ Early Soybean Growth and Development || |
| - | ^ Growth Stage ^ Time (Days) (Ideal Growing Conditions) | | + | ^ Growth Stage ^ Time (Days) (Ideal Growing Conditions) | |
| - | | First trifoliolate leaf emerges with leaflets on trifoliate above not touching (V1 stage) | 10 to 12 | | + | | First trifoliolate leaf emerges with leaflets on trifoliate above not touching (V1 stage) | 10 to 12 | |
| - | | Photosynthesis by the developed leaves is adequate for the plant to sustain itself | 12 to 14 | | + | | Photosynthesis by the developed leaves is adequate for the plant to sustain itself | 12 to 14 | |
| - | | The first (V1) through the fifth (V5) trifoliolate leaves emerge | 5-day intervals | | + | | The first (V1) through the fifth (V5) trifoliolate leaves emerge | 5-day intervals | |
| | V2 Stage\\ !BULLET 6 to 8 inches (15.2 to 20.3 cm)\\ !BULLET Active nitrogen fixation begins\\ !BULLET Lateral roots are proliferating rapidly into the top 6 inches (15.2 cm) of soil\\ V3 Stage\\ !BULLET 7 to 9 inches (17.9 to 22.9 cm)\\ V5 Stage\\ !BULLET 10 to 12 inches (25.4 to 30.5 cm) || | | V2 Stage\\ !BULLET 6 to 8 inches (15.2 to 20.3 cm)\\ !BULLET Active nitrogen fixation begins\\ !BULLET Lateral roots are proliferating rapidly into the top 6 inches (15.2 cm) of soil\\ V3 Stage\\ !BULLET 7 to 9 inches (17.9 to 22.9 cm)\\ V5 Stage\\ !BULLET 10 to 12 inches (25.4 to 30.5 cm) || | ||
| - | | The sixth (V6) to the last trifoliolate leaf [V(n)] develop (about the beginning of seed development in the pod | 3-day intervals | | + | | The sixth (V6) to the last trifoliolate leaf [V(n)] develop (about the beginning of seed development in the pod | 3-day intervals | |
| | At V6, lateral roots grow completely across a row spacing of 30 inches (76) cm) or less: 50% leaf loss at V6 reduces yield approximately 3% || | | At V6, lateral roots grow completely across a row spacing of 30 inches (76) cm) or less: 50% leaf loss at V6 reduces yield approximately 3% || | ||