Abstract
Abstract A greenhouse study was conducted to determine the effects of low‐rate commercial humic acid (HA) on phosphorus (P), iron (Fe), and zinc (Zn) availability and spring wheat yields, in both a calcareous soil and a noncalcareous soil. In Phase I, soluble P concentrations were monitored at 1.9, 3.8, and 5.7 cm from a monoammonium phosphate (MAP) fertilizer band that had either been coated with one of two HA products at the equivalent of 1.7 kg HA ha−1, a label rate, or left uncoated. Sampling occurred periodically up to 48 d after fertilizer application. In Phase II, uptake of P, Fe, and Zn and grain yield were measured in soils that had been fertilized with 7.5 or 25 kg P ha−1, either coated with HA or left uncoated. In Phase I, only three significant differences (P=0.05) out of 66 comparisons were found in soluble P concentrations between HA and control treatments at time points ranging from 4 to 48 d after fertilization. In addition, no significant differences were found in nutrient uptake, shoot biomass, or grain yield between HA and control treatments. These greenhouse results suggest that low commercial HA rates (∼1.7 kg HA ha−1) may be insufficient to enhance spring wheat growth.
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 3
Claim · model-written summary
Only three of 66 comparisons showed significant differences in soluble P concentrations between humic acid and control treatments.
- Taxon
- spring wheat
Triticum aestivume5 - Treatment
- coated with one of two HA productse6
- Outcome
- soluble P concentrationse1
- Comparator
- controle1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“only three significant differences (P=0.05) out of 66 comparisons were found in soluble P concentrations between HA and control treatments”
e5“spring wheat yields, in both a calcareous soil and a noncalcareous soil”
e6“coated with one of two HA products”
Claim · model-written summary
Humic acid coating produced no significant differences in nutrient uptake, shoot biomass or grain yield of spring wheat.
- Taxon
- spring wheatTriticum aestivume5
- Treatment
- coated with one of two HA productse6
- Outcome
- nutrient uptake, shoot biomass, or grain yielde2
- Direction
- no significant differencese2
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“no significant differences were found in nutrient uptake, shoot biomass, or grain yield between HA and control treatments”
e5“spring wheat yields, in both a calcareous soil and a noncalcareous soil”
e6“coated with one of two HA products”
Claim · model-written summary
Low commercial humic acid rates may be insufficient to enhance spring wheat growth.
- Taxon
- spring wheatTriticum aestivume5
- Treatment
- low commercial HA ratese3
- Outcome
- spring wheat growthe4
- Direction
- insufficient to enhancee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“These greenhouse results suggest that low commercial HA rates”
e4“may be insufficient to enhance spring wheat growth”
e5“spring wheat yields, in both a calcareous soil and a noncalcareous soil”
The same questions in other papers
other · nutrient: content · Triticum aestivum (wheat)Positive and negative results
10 papers in the same direction as this paper · 64 in the opposite direction
- positive
- positive
- positive
71 papers more in this group
See all 75 papers →other · growth · Triticum aestivum (wheat)Positive and negative results
13 papers in the same direction as this paper · 100 in the opposite direction
- positive
- positive
- positive
110 papers more in this group
See all 114 papers →other · yield · Triticum aestivum (wheat)Positive and negative results
16 papers in the same direction as this paper · 206 in the opposite direction
- positive
- positive
- positive
219 papers more in this group
See all 223 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.