Abstract
Abstract Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses and obtaining soil test calibration data. Four to 10‐fold corn grain yield increases resulted from P additions. Broadcast applications of 96 kg P/ha in combination with band treatments of 22 kg P/ha from either diammonium phosphate or ammonium polyphosphate were most efficient in increasing corn grain yields to 80% or more of maximum yield. Critical extractable soil P values for the two sites of 31 and 42, 29 and 37, 18 and 19, and 47 and 43 ppm were obtained for the Bray I, North Carolina (NC), Olsen, and Mehlich III soil test procedures, respectively. Increases in extractable soil P with increasing P applications expressed as ppm P/kg P applied varied for the two sites from 0.21 to 0.26 for the Bray I and NC procedures, 0.10 to 0.13 for the Olsen method, and 0.23 to 0.35 with the Mehlich III test. Key words: Triple superphosphateammonium polyphosphatediammonium phosphateBray INorth Carolina POlsenMehlich III
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Claims 9
Claim · model-written summary
P additions increased corn grain yield four to 10-fold.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- P additionse1
- Outcome
- grain yielde1
- Direction
- increasese1
- Value
- Four to 10‐folde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses”
e1“Four to 10‐fold corn grain yield increases resulted from P additions”
Claim · model-written summary
Broadcast 96 kg P/ha plus 22 kg P/ha band applications, from diammonium phosphate or ammonium polyphosphate, were most efficient in raising corn grain yield to 80% or more of maximum yield.
- Taxon
- cornZea mays subsp. mayse2
- Treatment
- Broadcast applications of 96 kg P/ha in combination with band treatments of 22 kg P/ha from either diammonium phosphate or ammonium polyphosphatee2
- Outcome
- corn grain yieldse2
- Direction
- most efficient in increasinge2
- Value
- 80% or more of maximum yielde2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Broadcast applications of 96 kg P/ha in combination with band treatments of 22 kg P/ha from either diammonium phosphate or ammonium polyphosphate were most efficient in increasing corn grain yields to 80% or more of maximum yield”
Claim · model-written summary
The critical extractable soil P value for the Bray I test was 31 and 42 ppm at the two sites.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Critical extractable soil Pe3
- Value
- 31 and 42e3
- Qualifier
- for the Bray Ie3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses”
e3“Critical extractable soil P values for the two sites of 31 and 42, 29 and 37, 18 and 19, and 47 and 43 ppm were obtained for the Bray I, North Carolina (NC), Olsen, and Mehlich III soil test procedures, respectively”
Claim · model-written summary
The critical extractable soil P value for the North Carolina (NC) test was 29 and 37 ppm at the two sites.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Critical extractable soil Pe3
- Value
- 29 and 37e3
- Qualifier
- North Carolina (NC)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses”
e3“Critical extractable soil P values for the two sites of 31 and 42, 29 and 37, 18 and 19, and 47 and 43 ppm were obtained for the Bray I, North Carolina (NC), Olsen, and Mehlich III soil test procedures, respectively”
Claim · model-written summary
The critical extractable soil P value for the Olsen test was 18 and 19 ppm at the two sites.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Critical extractable soil Pe3
- Value
- 18 and 19e3
- Qualifier
- Olsene3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses”
e3“Critical extractable soil P values for the two sites of 31 and 42, 29 and 37, 18 and 19, and 47 and 43 ppm were obtained for the Bray I, North Carolina (NC), Olsen, and Mehlich III soil test procedures, respectively”
Claim · model-written summary
The critical extractable soil P value for the Mehlich III test was 47 and 43 ppm at the two sites.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Critical extractable soil Pe3
- Value
- 47 and 43e3
- Qualifier
- Mehlich IIIe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses”
e3“Critical extractable soil P values for the two sites of 31 and 42, 29 and 37, 18 and 19, and 47 and 43 ppm were obtained for the Bray I, North Carolina (NC), Olsen, and Mehlich III soil test procedures, respectively”
Claim · model-written summary
Extractable soil P increased with P applications by 0.21 to 0.26 ppm per kg P applied for the Bray I and NC procedures.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increasing P applicationse4
- Outcome
- extractable soil Pe4
- Direction
- Increasese4
- Value
- 0.21 to 0.26e4
- Qualifier
- ppm P/kg P appliede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses”
e4“Increases in extractable soil P with increasing P applications expressed as ppm P/kg P applied varied for the two sites from 0.21 to 0.26 for the Bray I and NC procedures”
Claim · model-written summary
Extractable soil P increased with P applications by 0.10 to 0.13 ppm per kg P applied for the Olsen method.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increasing P applicationse4
- Outcome
- extractable soil Pe4
- Direction
- Increasese4
- Value
- 0.10 to 0.13e5
- Qualifier
- Olsen methode5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses”
e4“Increases in extractable soil P with increasing P applications expressed as ppm P/kg P applied varied for the two sites from 0.21 to 0.26 for the Bray I and NC procedures”
e5“0.10 to 0.13 for the Olsen method”
Claim · model-written summary
Extractable soil P increased with P applications by 0.23 to 0.35 ppm per kg P applied for the Mehlich III test.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increasing P applicationse4
- Outcome
- extractable soil Pe4
- Direction
- Increasese4
- Value
- 0.23 to 0.35e6
- Qualifier
- Mehlich III teste6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications ranging from 0 to 288 kg P/ha were broadcast alone and in combination with band treatments of 22 kg P/ha to two newlycleared Kempsville sandy loam (Typic Hapludults) soils for the purpose of measuring corn (Zea mays L.) yield responses”
e4“Increases in extractable soil P with increasing P applications expressed as ppm P/kg P applied varied for the two sites from 0.21 to 0.26 for the Bray I and NC procedures”
e6“0.23 to 0.35 with the Mehlich III test”
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