Claim · model-written summary
Foliar fertilization increased mean soybean yield by 30 kg ha −1 in 1995, not significantly.
- Taxon
- soybean
Glycine maxt0 - Treatment
- foliar applications of a 3–8–15 (N–P–K) fertilizere1
- Outcome
- mean yield increasese4
- Direction
- increasese4
- Value
- 30 kg ha −1e4
- Qualifier
- in 1995e4
- Comparator
- controle2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Foliar Fertilization of Soybean at Early Vegetative Stages”
e1“This study evaluated soybean responses to foliar applications of a 3–8–15 (N–P–K) fertilizer at early vegetative stages in 48 trials conducted on Iowa soils”
e2“In 1994, the treatments were a control”
e4“Mean yield increases were 60 kg ha −1 in 1994 (not significant), 30 kg ha −1 in 1995 (not significant), 60 kg ha −1 in 1996, and 54 kg ha −1 across the 48 sites”
Title
Foliar Fertilization of Soybean at Early Vegetative Stages
Mazhar U. Haq; Antonio P. Mallarino Agronomy Journal 1998. doi:10.2134/agronj1998.00021962009000060008x
Other claims from this paper (17)
- Intervention effect Foliar fertilization increased soybean yields at seven sites.
- Intervention effect Foliar fertilization decreased soybean yields at two sites.
- Intervention effect Foliar fertilization increased mean soybean yield by 60 kg ha −1 in 1994, not significantly.
- Intervention effect Foliar fertilization increased mean soybean yield by 60 kg ha −1 in 1996.
- Intervention effect Foliar fertilization increased mean soybean yield by 54 kg ha −1 across the 48 sites.
- Intervention effect A single 28 L ha −1 foliar application gave the highest mean yield increase across responsive sites, 375 kg ha −1.
- Observation Differences between foliar fertilization treatments in soybean were small and inconsistent.
- Association In 1994, higher soybean yield responses to foliar fertilization occurred when plant P concentration was low.
- Observation No foliar fertilization treatment caused soybean leaf burning.
- Intervention effect Foliar fertilization seldom increased P and K concentrations of soybean leaves at the R2 stage.
- Intervention effect Foliar fertilization did not affect soybean maturity, grain moisture or grain weight.
- Observation No simple set of measured variables explained the occurrence of soybean yield responses to foliar fertilization.
- Association Soybean yield responses to foliar fertilization tended to occur in soils with high cation exchange capacity.
- Association Soybean yield responses to foliar fertilization tended to occur when plant-available P was low.
- Association Soybean yield responses to foliar fertilization tended to occur when spring and midsummer rainfall was low.
- Observation The group of tested variables explained only 14 to 23% of soybean yield responses across years.
- Recommendation Effective foliar fertilization of soybean in predominantly high-testing soils needs further research on conditions with positive responses.