Claim · model-written summary
HA increased lettuce dry mass in one soil.
- Taxon
- romaine lettuce
Lactuca sativa var. longifoliae1 - Treatment
- HAe2
- Outcome
- plant dry masse0
- Direction
- increasede0
- Qualifier
- one soile0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant dry mass was increased in one soil”
e1“romaine lettuce ( Lactuca sativae L.)”
e2“HA had no significant effect”
Title
Humic Substances Generally Ineffective in Improving Vegetable Crop Nutrient Uptake or Productivity
Timothy K. Hartz; Thomas G. Bottoms HortScience 2010. doi:10.21273/hortsci.45.6.906
Other claims from this paper (9)
- Intervention effect Fertilizer plus HA stimulated microbial respiration in lower organic matter soil after seven days.
- Intervention effect Fertilizer plus HA stimulated detected phospholipid fatty acids in lower organic matter soil.
- Intervention effect These stimulatory effects were absent in higher organic matter soil.
- Intervention effect HA did not significantly affect romaine lettuce emergence rate or percentage.
- Intervention effect HA did not significantly affect romaine lettuce P uptake.
- Intervention effect HA did not increase tomato macro- or micronutrient uptake in either year.
- Intervention effect HA had no significant effect on tomato dry mass accumulation.
- Intervention effect HA had no significant effect on tomato fruit yield.
- Recommendation Typical commercial HA application is unlikely to significantly improve vegetable nutrient uptake or productivity.