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“yield decrease”

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1970

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paper W2044946647 ✕

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Deep plowing tended to decrease root yield of sudangrass.

Taxon: sudangrassSorghum ×drummondiie1
Treatment: Deep plowinge1
Outcome: root yieldse1
Direction: decreasee1

Not reportedComparator

Verbatim

e1
“Deep plowing tended to decrease root yields of sudangrass ( Sorghum sudanense ), sugarbeets, ( Beta vulgaris ), and soybeans ( Glycine max ) but had little effect on those of cabbage ( Brassica oleracea var. ‘capitata’)”
✓ located verbatim in the source · abstract, characters 441–660

Title

Profile Modification and Root Yield, Distribution, and Activity¹

Harold V. Eck; Ronald G. Davis Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300060034x

Other claims from this paper (11)

Intervention effect Deep plowing tended to decrease root yield of sugarbeets.
Intervention effect Deep plowing tended to decrease root yield of soybeans.
Intervention effect Deep plowing had little effect on root yield of cabbage.
Association Root yields of plants decreased with depth on soil rototilled to 20 cm or moldboard plowed to 90 cm.
Intervention effect Application of 22,400 kg/ha of Na2CO3 at the 90 cm plow depth made roots of plants tend to be evenly distributed throughout the 90 cm profile.
Intervention effect Profile modification enhanced root activity of plants, as measured by top-root ratios.
Method / resource Top-root ratios are better indicators of root activity than top or root yields alone.
Observation Sr 85 uptake showed that roots in the 70 to 90 cm zone were as active as roots in the 0 to 20 cm zone.
Intervention effect Na2CO3 tended to increase root weights in its zone of application.
Intervention effect Na2CO3 reduced radiostrontium uptake by about eightfold compared with similarly placed radiostrontium without Na2CO3.
Association Na2CO3 indicates a decrease in root activity.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Deep plowing tended to decrease root yield of sugarbeets.

Taxon: sugarbeetsBeta vulgaris subsp. vulgarise1
Treatment: Deep plowinge1
Outcome: root yieldse1
Direction: decreasee1

Not reportedComparator

Verbatim

e1
“Deep plowing tended to decrease root yields of sudangrass ( Sorghum sudanense ), sugarbeets, ( Beta vulgaris ), and soybeans ( Glycine max ) but had little effect on those of cabbage ( Brassica oleracea var. ‘capitata’)”
✓ located verbatim in the source · abstract, characters 441–660

Title

Profile Modification and Root Yield, Distribution, and Activity¹

Harold V. Eck; Ronald G. Davis Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300060034x

Other claims from this paper (11)

Intervention effect Deep plowing tended to decrease root yield of sudangrass.
Intervention effect Deep plowing tended to decrease root yield of soybeans.
Intervention effect Deep plowing had little effect on root yield of cabbage.
Association Root yields of plants decreased with depth on soil rototilled to 20 cm or moldboard plowed to 90 cm.
Intervention effect Application of 22,400 kg/ha of Na2CO3 at the 90 cm plow depth made roots of plants tend to be evenly distributed throughout the 90 cm profile.
Intervention effect Profile modification enhanced root activity of plants, as measured by top-root ratios.
Method / resource Top-root ratios are better indicators of root activity than top or root yields alone.
Observation Sr 85 uptake showed that roots in the 70 to 90 cm zone were as active as roots in the 0 to 20 cm zone.
Intervention effect Na2CO3 tended to increase root weights in its zone of application.
Intervention effect Na2CO3 reduced radiostrontium uptake by about eightfold compared with similarly placed radiostrontium without Na2CO3.
Association Na2CO3 indicates a decrease in root activity.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Deep plowing tended to decrease root yield of soybeans.

Taxon: soybeansGlycine maxe1
Treatment: Deep plowinge1
Outcome: root yieldse1
Direction: decreasee1

Not reportedComparator

Verbatim

e1
“Deep plowing tended to decrease root yields of sudangrass ( Sorghum sudanense ), sugarbeets, ( Beta vulgaris ), and soybeans ( Glycine max ) but had little effect on those of cabbage ( Brassica oleracea var. ‘capitata’)”
✓ located verbatim in the source · abstract, characters 441–660

Title

Profile Modification and Root Yield, Distribution, and Activity¹

Harold V. Eck; Ronald G. Davis Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300060034x

Other claims from this paper (11)

Intervention effect Deep plowing tended to decrease root yield of sudangrass.
Intervention effect Deep plowing tended to decrease root yield of sugarbeets.
Intervention effect Deep plowing had little effect on root yield of cabbage.
Association Root yields of plants decreased with depth on soil rototilled to 20 cm or moldboard plowed to 90 cm.
Intervention effect Application of 22,400 kg/ha of Na2CO3 at the 90 cm plow depth made roots of plants tend to be evenly distributed throughout the 90 cm profile.
Intervention effect Profile modification enhanced root activity of plants, as measured by top-root ratios.
Method / resource Top-root ratios are better indicators of root activity than top or root yields alone.
Observation Sr 85 uptake showed that roots in the 70 to 90 cm zone were as active as roots in the 0 to 20 cm zone.
Intervention effect Na2CO3 tended to increase root weights in its zone of application.
Intervention effect Na2CO3 reduced radiostrontium uptake by about eightfold compared with similarly placed radiostrontium without Na2CO3.
Association Na2CO3 indicates a decrease in root activity.

Associationauthor interpretationoriginal resultmeasured

Claim · model-written summary

Na2CO3 indicates a decrease in root activity.

Taxon: plantsViridiplantaee3
Treatment: Na 2 CO 3e7
Outcome: root activitye7
Direction: decreasee7

Verbatim

e3
“Root systems of plants grown on soil rotary tilled 20 cm deep”
✓ located verbatim in the source · abstract, characters 99–160

e7
“Na 2 CO 3 tended to increase root weights in its zone of application but reduced radiostrontium uptake about eightfold compared with uptake from similarly placed radiostrontium without Na 2 CO 3 , indicating a Na 2 CO 3 ‐induced decrease in root activity”
✓ located verbatim in the source · abstract, characters 1188–1442

Title

Profile Modification and Root Yield, Distribution, and Activity¹

Harold V. Eck; Ronald G. Davis Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300060034x

Other claims from this paper (11)

Intervention effect Deep plowing tended to decrease root yield of sudangrass.
Intervention effect Deep plowing tended to decrease root yield of sugarbeets.
Intervention effect Deep plowing tended to decrease root yield of soybeans.
Intervention effect Deep plowing had little effect on root yield of cabbage.
Association Root yields of plants decreased with depth on soil rototilled to 20 cm or moldboard plowed to 90 cm.
Intervention effect Application of 22,400 kg/ha of Na2CO3 at the 90 cm plow depth made roots of plants tend to be evenly distributed throughout the 90 cm profile.
Intervention effect Profile modification enhanced root activity of plants, as measured by top-root ratios.
Method / resource Top-root ratios are better indicators of root activity than top or root yields alone.
Observation Sr 85 uptake showed that roots in the 70 to 90 cm zone were as active as roots in the 0 to 20 cm zone.
Intervention effect Na2CO3 tended to increase root weights in its zone of application.
Intervention effect Na2CO3 reduced radiostrontium uptake by about eightfold compared with similarly placed radiostrontium without Na2CO3.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Deep plowing had little effect on root yield of cabbage.

Taxon: cabbageBrassica oleracea var. capitatae1
Treatment: Deep plowinge1
Outcome: root yieldse1
Direction: little effecte1

Not reportedComparator

Verbatim

e1
“Deep plowing tended to decrease root yields of sudangrass ( Sorghum sudanense ), sugarbeets, ( Beta vulgaris ), and soybeans ( Glycine max ) but had little effect on those of cabbage ( Brassica oleracea var. ‘capitata’)”
✓ located verbatim in the source · abstract, characters 441–660

Title

Profile Modification and Root Yield, Distribution, and Activity¹

Harold V. Eck; Ronald G. Davis Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300060034x

Other claims from this paper (11)

Intervention effect Deep plowing tended to decrease root yield of sudangrass.
Intervention effect Deep plowing tended to decrease root yield of sugarbeets.
Intervention effect Deep plowing tended to decrease root yield of soybeans.
Association Root yields of plants decreased with depth on soil rototilled to 20 cm or moldboard plowed to 90 cm.
Intervention effect Application of 22,400 kg/ha of Na2CO3 at the 90 cm plow depth made roots of plants tend to be evenly distributed throughout the 90 cm profile.
Intervention effect Profile modification enhanced root activity of plants, as measured by top-root ratios.
Method / resource Top-root ratios are better indicators of root activity than top or root yields alone.
Observation Sr 85 uptake showed that roots in the 70 to 90 cm zone were as active as roots in the 0 to 20 cm zone.
Intervention effect Na2CO3 tended to increase root weights in its zone of application.
Intervention effect Na2CO3 reduced radiostrontium uptake by about eightfold compared with similarly placed radiostrontium without Na2CO3.
Association Na2CO3 indicates a decrease in root activity.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Na2CO3 tended to increase root weights in its zone of application.

Taxon: plantsViridiplantaee3
Treatment: Na 2 CO 3e7
Outcome: root weightse7
Direction: increasee7
Qualifier: in its zone of applicatione7

Not reportedComparator

Verbatim

e3
“Root systems of plants grown on soil rotary tilled 20 cm deep”
✓ located verbatim in the source · abstract, characters 99–160

e7
“Na 2 CO 3 tended to increase root weights in its zone of application but reduced radiostrontium uptake about eightfold compared with uptake from similarly placed radiostrontium without Na 2 CO 3 , indicating a Na 2 CO 3 ‐induced decrease in root activity”
✓ located verbatim in the source · abstract, characters 1188–1442

Title

Profile Modification and Root Yield, Distribution, and Activity¹

Harold V. Eck; Ronald G. Davis Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300060034x

Other claims from this paper (11)

Intervention effect Deep plowing tended to decrease root yield of sudangrass.
Intervention effect Deep plowing tended to decrease root yield of sugarbeets.
Intervention effect Deep plowing tended to decrease root yield of soybeans.
Intervention effect Deep plowing had little effect on root yield of cabbage.
Association Root yields of plants decreased with depth on soil rototilled to 20 cm or moldboard plowed to 90 cm.
Intervention effect Application of 22,400 kg/ha of Na2CO3 at the 90 cm plow depth made roots of plants tend to be evenly distributed throughout the 90 cm profile.
Intervention effect Profile modification enhanced root activity of plants, as measured by top-root ratios.
Method / resource Top-root ratios are better indicators of root activity than top or root yields alone.
Observation Sr 85 uptake showed that roots in the 70 to 90 cm zone were as active as roots in the 0 to 20 cm zone.
Intervention effect Na2CO3 reduced radiostrontium uptake by about eightfold compared with similarly placed radiostrontium without Na2CO3.
Association Na2CO3 indicates a decrease in root activity.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Na2CO3 reduced radiostrontium uptake by about eightfold compared with similarly placed radiostrontium without Na2CO3.

Taxon: plantsViridiplantaee3
Treatment: Na 2 CO 3e7
Outcome: radiostrontium uptakee7
Direction: reducede7
Value: about eightfolde7
Comparator: similarly placed radiostrontium without Na 2 CO 3e7

Verbatim

e3
“Root systems of plants grown on soil rotary tilled 20 cm deep”
✓ located verbatim in the source · abstract, characters 99–160

e7
“Na 2 CO 3 tended to increase root weights in its zone of application but reduced radiostrontium uptake about eightfold compared with uptake from similarly placed radiostrontium without Na 2 CO 3 , indicating a Na 2 CO 3 ‐induced decrease in root activity”
✓ located verbatim in the source · abstract, characters 1188–1442

Title

Profile Modification and Root Yield, Distribution, and Activity¹

Harold V. Eck; Ronald G. Davis Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300060034x

Other claims from this paper (11)

Intervention effect Deep plowing tended to decrease root yield of sudangrass.
Intervention effect Deep plowing tended to decrease root yield of sugarbeets.
Intervention effect Deep plowing tended to decrease root yield of soybeans.
Intervention effect Deep plowing had little effect on root yield of cabbage.
Association Root yields of plants decreased with depth on soil rototilled to 20 cm or moldboard plowed to 90 cm.
Intervention effect Application of 22,400 kg/ha of Na2CO3 at the 90 cm plow depth made roots of plants tend to be evenly distributed throughout the 90 cm profile.
Intervention effect Profile modification enhanced root activity of plants, as measured by top-root ratios.
Method / resource Top-root ratios are better indicators of root activity than top or root yields alone.
Observation Sr 85 uptake showed that roots in the 70 to 90 cm zone were as active as roots in the 0 to 20 cm zone.
Intervention effect Na2CO3 tended to increase root weights in its zone of application.
Association Na2CO3 indicates a decrease in root activity.

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