Below are data from a study of intercropping on productivity of soybeans and sorghum. Intercropping is an agricultural system in which two different plants are planted in alternate rows. The data in Table 2 are without fertilization. Table 3 includes data for a control (no fertilization) and a variety of fertilization treatments. The last three treatments are a mix of chemical fertilizers and manures. For the manures, we don't know the concentrations of N, P, or K. In table 3, within each column, treatments with the same letter are not significantly different than one another. A. Based on the data, give ONE possible (and plausible) explanation for the effect of intercropping on production of soybeans and sorghum. B. Based on the data, is production of the two crops nutrient limited? If so, which crop is more nutrient limited? Explain your answers in relation to the data. C. For both soybeans and sorghum, we see an additional benefit of manure in comparison to chemical fertilizer alone. Give ONE possible (and plausible) explanation for this additional benefit.

Aquaculture Science
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Chapter4: Management Practices For Finfish
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Below are data from a study of intercropping on productivity of soybeans and sorghum. Intercropping is an agricultural system in which two different
plants are planted in alternate rows. The data in Table 2 are without fertilization. Table 3 includes data for a control (no fertilization) and a variety of
fertilization treatments. The last three treatments are a mix of chemical fertilizers and manures. For the manures, we don't know the concentrations of
N, P, or K. In table 3, within each column, treatments with the same letter are not significantly different than one another.
A. Based on the data, give ONE possible (and plausible) explanation for the effect of intercropping on production of soybeans and sorghum.
B. Based on the data, is production of the two crops nutrient limited? If so, which crop is more nutrient limited? Explain your answers in relation to the
data.
C. For both soybeans and sorghum, we see an additional benefit of manure in comparison to chemical fertilizer alone. Give ONE possible (and
plausible) explanation for this additional benefit.
Transcribed Image Text:Below are data from a study of intercropping on productivity of soybeans and sorghum. Intercropping is an agricultural system in which two different plants are planted in alternate rows. The data in Table 2 are without fertilization. Table 3 includes data for a control (no fertilization) and a variety of fertilization treatments. The last three treatments are a mix of chemical fertilizers and manures. For the manures, we don't know the concentrations of N, P, or K. In table 3, within each column, treatments with the same letter are not significantly different than one another. A. Based on the data, give ONE possible (and plausible) explanation for the effect of intercropping on production of soybeans and sorghum. B. Based on the data, is production of the two crops nutrient limited? If so, which crop is more nutrient limited? Explain your answers in relation to the data. C. For both soybeans and sorghum, we see an additional benefit of manure in comparison to chemical fertilizer alone. Give ONE possible (and plausible) explanation for this additional benefit.
Table 2
Biomass and root parameters of soybean and sorghum at 60 days after sowing.
Biomass (g/plant)
Sole soybean
Intercropped soybean
Sole sorghum
Intercropped sorghum
Table 3
Seed yield of sole and intercropped soybean and sorghum and monetary advantage index.
Treatment
Soybean
Sole
Actual yield (based
on 100%
population)
Control (No NPK)
75% NPK
100% NPK
75% NPK+FYM
75% NPK+PC
75% NPK+PM
Mean
701 d
852 c
953 c
31.0 1.58
21.0 +0.92
87.5 +3.31
132 + 3.27
1216 a
1109 b
1088 b
Intercrop
Converted yield
(converted to 100%
population)
683 d
851 c
918 c
1320 a
1159 b
1138 b
1009
Actual yield (based
on 75% population)
(512)
(698)
(689)
Root mass (g/plant)
5.4 0.16
3.4±0.08
35.8±0.20
44.2 + 2.01
(991)
(870)
(854)
(757)
Sorghum
Sole
Actual yield (based
on 100%
population)
1465 c
2963 d
3381 c
3875
b
3719 b
4113 a
3251
2563 c
5320 d
6431 c
Root length density (cm cm-³)
0.98 +0.03
0.75 +0.01
Intercrop
Converted yield
(converted to 100
population%)
7974 b
7754 b
8726 a
6461
2.33 ± 0.04
3.62 +0.03
Actual yield (based
on 25% population)
(645)
(1330)
(1607)
(1993)
(1939)
(2181)
(1373)
Transcribed Image Text:Table 2 Biomass and root parameters of soybean and sorghum at 60 days after sowing. Biomass (g/plant) Sole soybean Intercropped soybean Sole sorghum Intercropped sorghum Table 3 Seed yield of sole and intercropped soybean and sorghum and monetary advantage index. Treatment Soybean Sole Actual yield (based on 100% population) Control (No NPK) 75% NPK 100% NPK 75% NPK+FYM 75% NPK+PC 75% NPK+PM Mean 701 d 852 c 953 c 31.0 1.58 21.0 +0.92 87.5 +3.31 132 + 3.27 1216 a 1109 b 1088 b Intercrop Converted yield (converted to 100% population) 683 d 851 c 918 c 1320 a 1159 b 1138 b 1009 Actual yield (based on 75% population) (512) (698) (689) Root mass (g/plant) 5.4 0.16 3.4±0.08 35.8±0.20 44.2 + 2.01 (991) (870) (854) (757) Sorghum Sole Actual yield (based on 100% population) 1465 c 2963 d 3381 c 3875 b 3719 b 4113 a 3251 2563 c 5320 d 6431 c Root length density (cm cm-³) 0.98 +0.03 0.75 +0.01 Intercrop Converted yield (converted to 100 population%) 7974 b 7754 b 8726 a 6461 2.33 ± 0.04 3.62 +0.03 Actual yield (based on 25% population) (645) (1330) (1607) (1993) (1939) (2181) (1373)
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