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Method / resourceobservedoriginal resultnegativemeasured

Claim · model-written summary

Soil organic matter or total soil nitrogen was relatively ineffective as an index.

Outcome
relatively ineffectivee0
Comparator
soil organic matter or total soil nitrogen contentse0

Not reportedTaxon

Verbatim

e0

“Determination of soil organic matter or total soil nitrogen contents was relatively ineffective.”

✓ located verbatim in the source · abstract, characters 213–309

Title

AN EVALUATION OF NITROGEN SOIL TEST METHODS FOR ONTARIO SOILS

J. A. Smith Canadian Journal of Soil Science 1966. doi:10.4141/cjss66-029

Other claims from this paper (4)
Method / resourceobservedoriginal resultnegativemeasured

Claim · model-written summary

Total soil nitrogen and organic carbon did not satisfactorily predict dry matter and nitrogen uptake responses.

Taxon
ryegrassLoliumt0
Outcome
responses in dry matter and nitrogen uptakee0
Direction
not satisfactorye0
Comparator
three forms of nitrogene0

Verbatim

e0

“Total soil nitrogen and organic carbon were not satisfactory tests for predicting responses in dry matter and nitrogen uptake for the three forms of nitrogen.”

✓ located verbatim in the source · abstract, characters 342–500
t0

“ryegrass (Lolium perenne)”

✓ located verbatim in the source · abstract, characters 144–169

Title

Influence of different sources of nitrogen fertilizer on the value of soil nitrogen tests

GJ Osborne; RR Storrier Australian Journal of Experimental Agriculture 1976. doi:10.1071/ea9760881

Other claims from this paper (10)
Method / resourceobservedoriginal resultmeasured

Claim · model-written summary

Organic matter alone was a poor predictor of nitrogen availability to rice.

Outcome
poor predictors of N availability to ricee0
Comparator
total Ne0

Verbatim

e0

“Organic matter or methods which measure total N in soil alone were poor predictors of N availability to rice”

✓ located verbatim in the source · abstract, characters 1152–1260

Title

Predicting Nitrogen Availability to Rice: I. Comparison of Methods for Determining Available Nitrogen to Rice from Field and Reservoir Soils

J. L. Sims; J. P. Wells; D. L. Tackett Soil Science Society of America Journal 1967. doi:10.2136/sssaj1967.03615995003100050018x

Other claims from this paper (2)
Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic matter was a reliable nitrogen availability index for maize.

Taxon
MaizeZea mayst0
Outcome
organic mattere0
Comparator
N availability indicese0

Verbatim

e0

“organic matter, total N, and NO 3-N were the most reliable N availability indices.”

✓ located verbatim in the source · abstract, characters 1041–1123
t0

“Maize”

✓ located verbatim in the source · title, characters 83–88

Title

Equations for Estimating Phosphorus Fertilizer Requirements from Soil Analysis for Maize (Zea mays L.) Grown on Alfisols of Northwestern Ethiopia

Yihenew G. Selassie; Amnat Suwanarit; C. Suwannarat Witthayasan Kasetsat Witthayasat 2003

Other claims from this paper (7)
Method / resourceobservedoriginal resultnegativemeasured

Claim · model-written summary

Total plant available nitrogen was not a good predictor of corn nonresponsiveness to fertilizer nitrogen.

Treatment
fertilizer Ne0
Outcome
not a good predictore0

Not reportedComparator

Verbatim

e0

“Total PAN was not a good predictor of soils where corn was nonresponsive to fertilizer N”

✓ located verbatim in the source · abstract, characters 988–1076

Title

Estimating Yield and Yield Response using Computer Simulation of Plant Available Nitrogen from Soil Organic Matter and Manure

John T. Gilmour Soil Science Society of America Journal 2009. doi:10.2136/sssaj2008.0038n

Other claims from this paper (3)
Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

Total N was a reliable nitrogen availability index for maize.

Taxon
MaizeZea mayst0
Outcome
total Ne0
Comparator
N availability indicese0

Verbatim

e0

“organic matter, total N, and NO 3-N were the most reliable N availability indices.”

✓ located verbatim in the source · abstract, characters 1041–1123
t0

“Maize”

✓ located verbatim in the source · title, characters 83–88

Title

Equations for Estimating Phosphorus Fertilizer Requirements from Soil Analysis for Maize (Zea mays L.) Grown on Alfisols of Northwestern Ethiopia

Yihenew G. Selassie; Amnat Suwanarit; C. Suwannarat Witthayasan Kasetsat Witthayasat 2003

Other claims from this paper (7)
Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

NO 3-N was a reliable nitrogen availability index for maize.

Taxon
MaizeZea mayst0
Outcome
NO 3-Ne0
Comparator
N availability indicese0

Verbatim

e0

“organic matter, total N, and NO 3-N were the most reliable N availability indices.”

✓ located verbatim in the source · abstract, characters 1041–1123
t0

“Maize”

✓ located verbatim in the source · title, characters 83–88

Title

Equations for Estimating Phosphorus Fertilizer Requirements from Soil Analysis for Maize (Zea mays L.) Grown on Alfisols of Northwestern Ethiopia

Yihenew G. Selassie; Amnat Suwanarit; C. Suwannarat Witthayasan Kasetsat Witthayasat 2003

Other claims from this paper (7)
Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

A history of manure applications was a good predictor of corn nonresponsiveness to fertilizer nitrogen.

Treatment
manure applicationse0
Outcome
a good predictor of nonresponsivenesse0

Not reportedComparator

Verbatim

e0

“Total PAN was not a good predictor of soils where corn was nonresponsive to fertilizer N, while a history of manure applications was a good predictor of nonresponsiveness”

✓ located verbatim in the source · abstract, characters 988–1158

Title

Estimating Yield and Yield Response using Computer Simulation of Plant Available Nitrogen from Soil Organic Matter and Manure

John T. Gilmour Soil Science Society of America Journal 2009. doi:10.2136/sssaj2008.0038n

Other claims from this paper (3)
Method / resourceobservedoriginal resultno effectmeasured

Claim · model-written summary

For cotton, initial nitrate N was most correlated with uptake, and adding total N did not improve prediction.

Outcome
prediction of N uptakee0
Direction
did not improvee0
Comparator
initial NO 3 ‐N, 0–12 inchese0

Verbatim

e0

“With cotton growing on desert soils low in organic matter, initial NO 3 ‐N, 0–12 inches, was most highly correlated with N uptake, and combining the effect of initial NO 3 ‐N and total N did not improve the prediction of N uptake”

✓ located verbatim in the source · abstract, characters 1433–1662

Title

The Relationship Between Soil Tests for Available Nitrogen and Nitrogen Uptake by Various Irrigated Crops in the Western States

W. F. Spencer; A. J. MacKenzie; F. G. Viets Soil Science Society of America Journal 1966. doi:10.2136/sssaj1966.03615995003000040025x

Other claims from this paper (4)

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