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“extractable nutrients”

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Observationobservedoriginal resultmeasured

Claim · model-written summary

Pecan shells were low in soluble salts and water-extractable nutrients.

Outcome: soluble salts and water-extractable nutrientse5
Direction: lowe5

Not reportedTaxon

Verbatim

e5
“Shells were acidic (pH 4.8) and low in soluble salts and water-extractable nutrients”
✓ located verbatim in the source · abstract, characters 228–312

Title

Pecan Shells as an Organic Component of Container Potting Media

Tsai-Yih Wang; Franklin A. Pokorny HortScience 1989. doi:10.21273/hortsci.24.1.75

Other claims from this paper (7)

Association Begonia growth increased linearly as the percentage of sand in shell-based media rose from 0% to 75%.
Association Tomato growth increased linearly as the percentage of sand in shell-based media rose from 0% to 75%.
Intervention effect Begonias grown in the 1 shell : 3 sand mix equaled the growth and quality of control plants.
Intervention effect Tomato plants in shell-based media were not comparable in growth to the control.
Intervention effect Ilex grown in shell-based media was equivalent in size and quality to Ilex grown in peat-perlite.
Observation Pecan shells were acidic, with a pH of 4.8.
Recommendation The authors recommend that raw pecan shells be hammer-milled or otherwise transformed into a physically consistent product before use as medium.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Sorghum cultivar did not influence soil pH, microaggregation, organic C, or extractable nutrients.

Taxon: sorghumSorghume0
Treatment: sorghum cultivare0
Outcome: soil pH, microaggregation, organic C, or extractable nutrientse0
Direction: Neithere0

Not reportedComparator

Verbatim

e0
“Neither sorghum cultivar nor fertilizer N addition influenced soil pH, microaggregation, organic C, or extractable nutrients in this fine-textured Vertisol.”
✓ located verbatim in the source · abstract, characters 409–565

Title

Sorghum Stover Removal Effects on Soil Organic Matter content, Extractable Nutrients, and Crop Yield

J. M. Powell; F. M. Hons Journal of Sustainable Agriculture 1992. doi:10.1300/j064v02n01_04

Other claims from this paper (8)

Intervention effect Fertilizer N did not influence soil pH, microaggregation, organic C, or extractable nutrients.
Intervention effect Complete stover removal decreased soil organic matter by 5.2%.
Intervention effect Complete stover removal decreased extractable P by 10.0%.
Intervention effect Complete stover removal decreased extractable K by 4.0%.
Intervention effect Complete stover removal did not affect soil microaggregation.
Observation Sorghum yields increased over time with annual complete stover removal and no fertilizer N.
Mechanism Stover removal possibly caused extra annual net nitrogen release estimated at 14 to 35 kg N.
Mechanism Stover removal possibly caused extra annual net phosphorus release estimated at 1.7 to 4.1 kg P ha−1.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Fertilizer N did not influence soil pH, microaggregation, organic C, or extractable nutrients.

Taxon: sorghumSorghume0
Treatment: fertilizer N additione0
Outcome: soil pH, microaggregation, organic C, or extractable nutrientse0
Direction: Neithere0

Not reportedComparator

Verbatim

e0
“Neither sorghum cultivar nor fertilizer N addition influenced soil pH, microaggregation, organic C, or extractable nutrients in this fine-textured Vertisol.”
✓ located verbatim in the source · abstract, characters 409–565

Title

Sorghum Stover Removal Effects on Soil Organic Matter content, Extractable Nutrients, and Crop Yield

J. M. Powell; F. M. Hons Journal of Sustainable Agriculture 1992. doi:10.1300/j064v02n01_04

Other claims from this paper (8)

Intervention effect Sorghum cultivar did not influence soil pH, microaggregation, organic C, or extractable nutrients.
Intervention effect Complete stover removal decreased soil organic matter by 5.2%.
Intervention effect Complete stover removal decreased extractable P by 10.0%.
Intervention effect Complete stover removal decreased extractable K by 4.0%.
Intervention effect Complete stover removal did not affect soil microaggregation.
Observation Sorghum yields increased over time with annual complete stover removal and no fertilizer N.
Mechanism Stover removal possibly caused extra annual net nitrogen release estimated at 14 to 35 kg N.
Mechanism Stover removal possibly caused extra annual net phosphorus release estimated at 1.7 to 4.1 kg P ha−1.

Associationauthor interpretationoriginal resultmeasured

Claim · model-written summary

Extractable soil nutrients were relatively good predictors of potential soil and plant deficiencies.

Taxon: MaizeZea mayst0
Outcome: potential soil and plant deficienciese0
Comparator: Extractable soil nutrientse0

Not reportedDirection

Verbatim

e0
“Extractable soil nutrients could be used as relatively good predictor of potential soil and plant deficiencies”
✓ located verbatim in the source · abstract, characters 1265–1375

t0
“maize”
✓ located verbatim in the source · title, characters 94–99

Title

Micronutrient availability in soils of Northwest Bosnia and Herzegovina in relation to silage maize production

Djordje Grujcic; Milanka Drinic; Iva Zivanovic; et al. Acta Agriculturae Scandinavica Section B - Soil & Plant Science 2017. doi:10.1080/09064710.2017.1398781

Other claims from this paper (8)

Observation Soil types did not differ significantly in plant-available nutrients.
Observation P deficiency occurred in both soil and plants across the region.
Observation Soil extractable P ranged from 0.003–0.13 g kg−1.
Observation Total plant P ranged from 0.79–4.95 g kg−1.
Observation Zinc deficiency occurred at two locations in both soil and maize.
Observation Some locations had potential soil Se deficiency.
Observation Plant Se status was inadequate to meet daily requirements of farm animals.
Association Soil nutrient interactions and climate conditions strongly affected potential plant uptake.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Extractable soil nutrients affected stoichiometry through aboveground biomass.

Outcome: stoichiometrye0
Qualifier: through aboveground biomasse0

Not reportedTaxon

Verbatim

e0
“extractable soil nutrients exert their impacts on stoichiometry through aboveground biomass”
✓ located verbatim in the source · abstract, characters 923–1014

Title

Nutrient stoichiometry of three plant species under a natural nutrient gradient of a semiarid small watershed

Linjing Qiu; Xiaorong Wei; Linhai Li Acta Agriculturae Scandinavica Section B - Soil & Plant Science 2012. doi:10.1080/09064710.2012.753107

Other claims from this paper (5)

Observation Nutrient stoichiometry varied between plants and within a plant at watershed scale.
Association N:P in N limited plants was mainly determined by plant N.
Association N:P in P or P+N limited plants was dominated by plant P.
Association N:K and K:P were mainly controlled by plant K with weak relation to nutrient limitations.
Association Aboveground biomass directly influenced nutrient stoichiometry.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Nitrogen effects on extractable soil nutrients varied.

Taxon: durum wheatTriticum turgidum subsp. durumt0
Treatment: N fertilizatione0
Outcome: amounts of extractable nutrients in the soile0

Not reportedComparatorDirection

Verbatim

e0
“The effects of N fertilization on the amounts of extractable nutrients in the soil were more variable.”
✓ located verbatim in the source · abstract, characters 1373–1475

t0
“durum wheat”
✓ located verbatim in the source · title, characters 101–112

Title

Effect of nitrogen application on concentration of cadmium and nutrient ions in soil solution and in durum wheat

L. G. Mitchell; C. A. Grant; G. J. Racz Canadian Journal of Soil Science 2000. doi:10.4141/s98-085

Other claims from this paper (9)

Intervention effect Soil solution cadmium concentration increased significantly as nitrogen rate rose.
Intervention effect DTPA-extractable soil cadmium increased significantly as nitrogen rate rose.
Observation Cadmium concentration increases were greatest just after nitrogen fertilization.
Intervention effect Nitrogen fertilization increased soil solution nutrient concentrations except phosphate.
Intervention effect Plant cadmium concentration rose with nitrogen application up to 800 µg g −1.
Intervention effect Dry matter yield rose with nitrogen rate only to 200 µg g −1.
Intervention effect Transpiration rose with nitrogen rate only to 200 µg g −1.
Observation Cadmium was the element most affected by increasing nitrogen rate.
Observation Uptake of other elements showed minor changes with nitrogen rate and time.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Nutrient concentrations in kernels were positively correlated with AB‐DTPA extractable soil nutrients.

Taxon: cornZea mays subsp. mayst0
Organ / stage: kernelse5
Outcome: Concentrations of nutrients in the kernelse5
Direction: positively correlatede5
Comparator: AB‐DTPA extractable soil nutrientse5

Verbatim

t0
“corn leaves and kernels”
✓ located verbatim in the source · title, characters 57–80

e5
“Concentrations of nutrients in the kernels were positively correlated with corresponding nutrient concentrations in the leaves and with AB‐DTPA extractable soil nutrients”
✓ located verbatim in the source · abstract, characters 687–857

Title

Salinity induced effects on the nutrient status of soil, corn leaves and kernels

S. Rahman; G.F. Vance; L.C. Munn Communications in Soil Science and Plant Analysis 1993. doi:10.1080/00103629309368953

Other claims from this paper (17)

Association Water soluble Na was a better predictor of salinity than pH and other cations.
Association Soil electrical conductivity was negatively correlated with soil total K, Cu and Fe.
Association Soil electrical conductivity was negatively correlated with soil Mn.
Association Soil electrical conductivity was positively correlated with total N, NO3‐N and PO4‐P.
Association Soil electrical conductivity was positively correlated with Zn and pH.
Association Soil electrical conductivity was positively correlated with water soluble Na, Ca and Mg.
Association Soil EC had a significant positive relationship with N, P and Mo.
Association Soil EC had a significant positive relationship with Zn.
Association Soil EC had negative relationships with K, Cu and Fe in corn leaves and kernels.
Association Soil EC had a negative relationship with Mn in corn leaves and kernels.
Association Nutrient concentrations in kernels were positively correlated with those in leaves.
Intervention effect Soil samples with high salinity had higher pH than samples with low salinity.
Intervention effect Soil samples with high salinity had significantly higher soluble Na, Ca and Mg than samples with low salinity.
Intervention effect Soil samples with high salinity had significantly higher total N, NO3‐N and PO4‐P than samples with low salinity.
Intervention effect Soil samples with high salinity had significantly higher Zn than samples with low salinity.
Intervention effect Soil samples with high salinity had significantly lower Mn than samples with low salinity.
Association Kernel weight per cob and plant height were reduced as salinity increased.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Fertility treatments produced few effects on soil extractable nutrients and leaf nutrient levels.

Taxon: half-highbush blueberrye0
Treatment: fertility treatmentse1
Outcome: extractable levels of nutrients in the soil and leafe1
Direction: few effectse1

Not reportedComparator

Verbatim

e0
“half-highbush blueberry cultivars”
✓ located verbatim in the source · abstract, characters 40–73

e1
“The fertility treatments produced few effects on extractable levels of nutrients in the soil and leaf”
✓ located verbatim in the source · abstract, characters 724–825

Title

Effect of Organic Amendments on Half-Highbush Blueberry Production and Soil Fertility

P. R. Warman; Sanjutha Shanmugam eArsiv - Adu (Adnan Menderes University) 2008

Other claims from this paper (9)

Observation Chippewa responded more than Polaris to fertility treatments.
Intervention effect Ruminant compost supplied potassium fertilization over all three growing seasons.
Intervention effect Chippewa showed soil phosphorus response to ruminant compost through the growing season.
Intervention effect Ruminant compost did not produce a comparable increase in Chippewa fruit yield.
Intervention effect NPK fertilizer reduced soil pH compared with other amendments.
Intervention effect MSW treatment increased soil pH each year.
Intervention effect Fruit yields did not differ statistically among treatments for either cultivar in the reported year.
Intervention effect Composts supplied equivalent essential plant nutrients without increasing trace elements in soil and tissue.
Intervention effect Composts did not increase trace element concentration in soil and tissue.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Water extractable nutrients were related to seedling yield and uptake.

Taxon: Red pinePinus resinosae1
Treatment: Water extractable nutrients of the growing mediume0
Outcome: yield and nutrient uptake of the seedlingse0

Not reportedDirection

Verbatim

e0
“Water extractable nutrients of the growing medium were related to yield and nutrient uptake of the seedlings.”
✓ located verbatim in the source · abstract, characters 484–593

e1
“Red pine (Pinus resinosa Ait.) seedlings”
✓ located verbatim in the source · abstract, characters 9–49

Title

Optimum nutrient levels in a container growing medium determined by a saturated aqueous extract

V.R. Timmer; W.J. Parton Communications in Soil Science and Plant Analysis 1984. doi:10.1080/00103628409367502

Other claims from this paper (7)

Observation Red pine seedlings displayed deficiency, sufficiency, luxury consumption and toxicity across fertility levels.
Observation Optimum red pine seedling N was 15–65 ppm.
Observation Optimum red pine seedling P was 35–95 ppm.
Observation Optimum red pine seedling K was 25–115 ppm.
Observation Optimum red pine seedling Ca was 30–60 ppm.
Observation Optimum red pine seedling Mg was 15–35 ppm.
Observation Optimum growing medium conductivity was 1.0–2.2 dS/m.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Treatments receiving sludge significantly improved soil organic carbon, available macro-nutrients and DTPA-extractable micro-nutrients over 100% NPK.

Taxon: maizeZea mayst0
Treatment: treatments receiving sludgee3
Outcome: organic carbon, available macro-nutrients and DTPA-extractable micro-nutrientse3
Direction: improvede3
Comparator: 100% NPKe3

Verbatim

t0
“Evaluation of domestic sludge as a nutritional source for maize (Zea mays L.) under Kashmir temperate conditions”
✓ located verbatim in the source · title, characters 0–112

e3
“The treatments receiving sludge significantly improved organic carbon, available macro-nutrients and DTPA-extractable micro-nutrients in soil over 100% NPK”
✓ located verbatim in the source · abstract, characters 1406–1561

Title

Evaluation of domestic sludge as a nutritional source for maize (Zea mays L.) under Kashmir temperate conditions

M. Y. Bhat; Javaid Ahmad Wani; Wani; et al. Applied Biological Research 2013

Other claims from this paper (9)

Intervention effect The 75% recommended NPK plus 30 t sludge per ha treatment gave the highest maize grain yield.
Intervention effect The 75% recommended NPK plus 30 t sludge per ha treatment gave the highest stover yield.
Intervention effect The 75% recommended NPK plus 30 t sludge per ha treatment gave the highest grain nutrient contents.
Intervention effect The 75% recommended NPK plus 30 t sludge per ha treatment gave the highest stover nutrient contents.
Intervention effect Uptake of N, P, K, Zn and Fe by maize was significantly higher with 75% recommended NPK plus 30 t sludge per ha than with other treatments.
Intervention effect The 100% recommended NPK plus 15 t sludge per ha treatment was statistically at par with the highest grain yield treatment.
Intervention effect The 75% recommended NPK plus 15 t sludge per ha treatment was statistically at par with the highest grain yield treatment.
Intervention effect The 50% recommended NPK plus 30 t sludge per ha treatment was statistically at par with the highest grain yield treatment.
Recommendation Integrated use of sludge with NPK may help sustain maize yield and improve soil health in the Lesser Himalayas.

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