Abstract
Availabilities of the phosphorus in twelve different phosphate sources to alfalfa were determined in a growth chamber. Two crops of alfalfa were grown on two soils of high base status, Machete stony sandy loam and Westwold loam. Fertilizer materials containing monocalcium phosphate or materials such as calcium metaphosphate which are converted to monocalcium phosphate brought about the greatest increases in yield. However, yield increases also resulted from treatments with the ammonium phosphates and orthophosphoric acid. Ammonium phosphate fertilizers were the most effective in increasing the percentage of phosphorus present in the alfalfa tissue. Ammonium phosphate and monocalcium phosphate materials were equally effective in increasing total phosphorus uptake by alfalfa. The amount of CO 2 soluble phosphorus extracted from the Westwold loam, following treatment with the various phosphate sources, was correlated with the yield of the first crop of alfalfa. The average per cent P in the alfalfa tissue was found to be correlated with the CO 2 soluble P. Both the NaHCO 3 and CO 2 extractable soil phosphorus levels of the Westwold loam, after it had been treated with the different phosphate materials, were found to be highly correlated with the phosphorus uptake by the second crop of alfalfa and with the total phosphorus uptake.
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Claims 7
Claim · model-written summary
Monocalcium phosphate and materials converted to it, such as calcium metaphosphate, gave the greatest yield increases in alfalfa.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- monocalcium phosphate or materials such as calcium metaphosphatee2
- Outcome
- yielde2
- Direction
- greatest increasese2
- Setting
- growth chambere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ALFALFA”
e1“Availabilities of the phosphorus in twelve different phosphate sources to alfalfa were determined in a growth chamber”
e2“Fertilizer materials containing monocalcium phosphate or materials such as calcium metaphosphate which are converted to monocalcium phosphate brought about the greatest increases in yield”
Claim · model-written summary
Ammonium phosphates and orthophosphoric acid also increased alfalfa yield.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ammonium phosphates and orthophosphoric acide3
- Outcome
- yielde3
- Direction
- increasese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ALFALFA”
e3“However, yield increases also resulted from treatments with the ammonium phosphates and orthophosphoric acid”
Claim · model-written summary
Ammonium phosphate fertilizers were the most effective in increasing the phosphorus percentage in alfalfa tissue.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Ammonium phosphate fertilizerse4
- Outcome
- percentage of phosphorus present in the alfalfa tissuee4
- Direction
- increasinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ALFALFA”
e4“Ammonium phosphate fertilizers were the most effective in increasing the percentage of phosphorus present in the alfalfa tissue”
Claim · model-written summary
Ammonium phosphate and monocalcium phosphate materials were equally effective in increasing total phosphorus uptake by alfalfa.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Ammonium phosphatee5
- Outcome
- total phosphorus uptakee5
- Direction
- increasinge5
- Comparator
- monocalcium phosphate materialse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ALFALFA”
e5“Ammonium phosphate and monocalcium phosphate materials were equally effective in increasing total phosphorus uptake by alfalfa”
Claim · model-written summary
CO2-soluble phosphorus extracted from Westwold loam was correlated with the yield of the first alfalfa crop.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- CO 2 soluble phosphoruse6
- Outcome
- yield of the first crope6
- Setting
- Westwold loame6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ALFALFA”
e6“The amount of CO 2 soluble phosphorus extracted from the Westwold loam, following treatment with the various phosphate sources, was correlated with the yield of the first crop of alfalfa”
Claim · model-written summary
Percent P in alfalfa tissue was correlated with CO2-soluble P.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- per cent P in the alfalfa tissuee7
- Comparator
- CO 2 soluble Pe7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ALFALFA”
e7“The average per cent P in the alfalfa tissue was found to be correlated with the CO 2 soluble P”
Claim · model-written summary
NaHCO3- and CO2-extractable soil phosphorus were highly correlated with P uptake by the second alfalfa crop.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- NaHCO 3 and CO 2 extractable soil phosphorus levelse0
- Outcome
- phosphorus uptake by the second crop of alfalfae0
- Qualifier
- and with the total phosphorus uptakee0
- Setting
- Westwold loame0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ALFALFA”
e0“Both the NaHCO 3 and CO 2 extractable soil phosphorus levels of the Westwold loam, after it had been treated with the different phosphate materials, were found to be highly correlated with the phosphorus uptake by the second crop of alfalfa and with the total phosphorus uptake”
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