Claim · model-written summary
56 kg/ha nitrogen increased seed weight per head by 17.7 g.
- Taxon
- sunflower
Helianthus annuuse1 - Treatment
- Nitrogen at 56 kg/hae0
- Outcome
- grams of seed per heade0
- Direction
- increasede0
- Value
- 17.7 ge0
- Comparator
- nontreated plotse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen at 56 kg/ha increased seed yield, grams of seed per head, seed size, and head diameter 653 kg/ha, 17.7 g, 1.9 g/200, and 2.2 cm, respectively, as compared to nontreated plots”
e1“sunflower ( Helianthus annuus L .)”
Title
Effects of Nitrogen Rates and Plant Spacing on Sunflower Seed Yields and Other Characteristics1
John H. Massey Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300010043x
Other claims from this paper (14)
- Intervention effect 56 kg/ha nitrogen increased seed yield by 653 kg/ha.
- Intervention effect 56 kg/ha nitrogen increased seed size by 1.9 g/200.
- Intervention effect 56 kg/ha nitrogen increased head diameter by 2.2 cm.
- Intervention effect 56 kg nitrogen increased plant height by 11 cm.
- Intervention effect 56 kg nitrogen increased stem diameter by 4 mm.
- Intervention effect Additional nitrogen gave no further increases.
- Intervention effect Nitrogen did not affect leaf number.
- Intervention effect Seed yield decreased with each 15-cm spacing increase.
- Intervention effect Yield per head increased with each 15-cm spacing increase.
- Intervention effect Head diameter increased with each 15-cm spacing increase.
- Intervention effect Seeds were larger at 30 and 46 cm than 15 cm spacing.
- Intervention effect Spacing did not affect plant height or number of leaves.
- Intervention effect Stem diameter increased with wider spacing.
- Association Nitrogen and spacing had no significant interaction.