Abstract
Several studies showed that rock phosphate efficiency may be increased when this fertilizer is mixed with soluble phosphates such as triple superphosphate (TSP), but most of these findings were obtained after 1 yr under conventional tillage. This study examined soybean [ Glycine max (L.) Merr.] response to mixtures of Arad reactive rock phosphate (RRP) and TSP as affected by previous P fertilization. Plots received no fertilization and TSP or RRP broadcast on soil surface at a rate of 35 kg ha −1 of P in the first year. Mixtures containing 0, 20, 40, 60, 80, and 100% of RRP were then applied to soybean seed furrows at 35 kg ha −1 of P for 3 yr. Soybean responded to broadcast TSP from the first year on, while broadcast RRP increased available soil P, soybean leaf P content and yields from the second year on. Soybean responses to an increase of TSP in the mixture was linear, except for the third year, when the mixture of 40% RRP resulted in similar yields as TSP. The mixture of RRP with TSP applied to seed furrows did not produce similar soybean yields as those obtained with TSP applied alone in the first 2 yr. Combining rock phosphate and soluble phosphate to substitute for soluble phosphate is not a viable option for no‐tilled soybean, because the efficiency of this fertilizer is relatively low and it does not increase when mixed with TSP.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Broadcast TSP increased soybean response from the first year.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- broadcast TSPe0
- Outcome
- respondede0
- Direction
- respondede0
- Qualifier
- from the first year one0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean responded to broadcast TSP from the first year on”
Claim · model-written summary
Broadcast RRP increased available soil P from year two.
- Taxon
- soybeanGlycine maxe0
- Treatment
- broadcast RRPe0
- Outcome
- available soil Pe0
- Direction
- increasede0
- Qualifier
- from the second year one0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broadcast RRP increased available soil P, soybean leaf P content and yields from the second year on”
Claim · model-written summary
Broadcast RRP increased soybean leaf P content from year two.
- Taxon
- soybeanGlycine maxe0
- Treatment
- broadcast RRPe0
- Outcome
- soybean leaf P contente0
- Direction
- increasede0
- Qualifier
- from the second year one0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broadcast RRP increased available soil P, soybean leaf P content and yields from the second year on”
Claim · model-written summary
Broadcast RRP increased soybean yields from year two.
- Taxon
- soybeanGlycine maxe0
- Treatment
- broadcast RRPe0
- Outcome
- yieldse0
- Direction
- increasede0
- Qualifier
- from the second year one0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broadcast RRP increased available soil P, soybean leaf P content and yields from the second year on”
Claim · model-written summary
Soybean response increased linearly with TSP share in the mixture except in year three.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- TSP in the mixturee0
- Outcome
- Soybean responsese0
- Direction
- increasee0
- Qualifier
- except for the third yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean responses to an increase of TSP in the mixture was linear, except for the third year”
Claim · model-written summary
In the third year, 40% RRP mixture and TSP alone produced similar yields.
- Taxon
- soybeanGlycine maxt0
- Treatment
- mixture of 40% RRPe0
- Outcome
- yieldse0
- Direction
- similare0
- Qualifier
- third yeare0
- Comparator
- TSPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the third year, when the mixture of 40% RRP resulted in similar yields as TSP”
t0“Soybean”
Claim · model-written summary
RRP–TSP mixtures gave lower soybean yields than TSP alone in the first two years.
- Taxon
- soybeanGlycine maxe0
- Treatment
- mixture of RRP with TSP applied to seed furrowse0
- Outcome
- soybean yieldse0
- Direction
- did not produce similare0
- Qualifier
- first 2 yre0
- Comparator
- TSP applied alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mixture of RRP with TSP applied to seed furrows did not produce similar soybean yields as those obtained with TSP applied alone in the first 2 yr”
Claim · model-written summary
The authors conclude substituting mixed rock phosphate for soluble phosphate is not viable for no-till soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Combining rock phosphate and soluble phosphatee0
- Outcome
- not a viable optione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combining rock phosphate and soluble phosphate to substitute for soluble phosphate is not a viable option for no‐tilled soybean”
Claim · model-written summary
The authors conclude rock phosphate efficiency is low and does not increase when mixed with TSP.
- Taxon
- soybeanGlycine maxt0
- Treatment
- mixed with TSPe0
- Outcome
- efficiency of this fertilizere0
- Direction
- does not increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the efficiency of this fertilizer is relatively low and it does not increase when mixed with TSP”
t0“Soybean”
The same questions in other papers
transplanting · nutrient: content · Glycine max (soybean)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
4 papers more in this group
See all 8 papers →transplanting · yield · Glycine max (soybean)Positive and negative results
31 papers in the same direction as this paper · 12 in the opposite direction
- no effect
- negative
- no effect
40 papers more in this group
See all 44 papers →phosphorus · nutrient: content · Glycine max (soybean)Positive and negative results
106 papers in the same direction as this paper · 17 in the opposite direction
- negative
- no effect
- negative
120 papers more in this group
See all 124 papers →phosphorus · yield · Glycine max (soybean)Positive and negative results
302 papers in the same direction as this paper · 42 in the opposite direction · 10 reporting no difference from an alternative
- positive
- negative
- negative
351 papers more in this group
See all 355 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.