Abstract
Normal fertilizer placement, two deeper than normal, broadcast and no fertilizer treatments were compared in a stubble tillage system in the north-western Free State.Plant growth, as indicated by leaf area, leaf dry mass and stem dry mass, was evaluated at three intervals until flowering during the three growing seasons of 1985/86 to 1987/88.Tillering and grain yield were measured at harvest.The deeper than normal placement of fertilizer gave up to an 11% increase in yield in the drier years (345 mm and 356 mm rainfall) but not in the wetter year (869 mm rainfall).Deeper placement initially resulted in poorer plant growth, but had the best plant growth at flowering.Deeper placement also resulted in less tillering.Normale bemestingplasing, twee dieper as normaal, breedwerpig toegediende en geen bemestingspeil, was onder 'n stoppelbewerkingstelsel in die noord-wes Vrystaat geavalueer.Plantontwikkeling, soos aangetoon deur middel van blaaroppervlakte metings, asook blaar-en starn droemassa, was met drie intervalle tot op stuifmeelstort ocr die drie seisoene 1985/86 tot 1987/88 gemonitor.Spruitvorming en graanopbrengs is tydens oes bepaal.Die dieper plasing van bemesting veroorsaak tot 'n 11% verhoging in graanopbrengs in die droar seisoene (345 mm en 356 mm reanval), maar nie in die natter seisoen (869 mm reenval) nie.Dieper plasing veroorsaak aanvanklik swakker plantontwikkeling, maar tydens blomstadium het dit die beste plantontwikkeling.Dieper plasing het minder spruitvorming veroorsaak.
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Claims 5
Claim · model-written summary
Deeper fertilizer placement increased grain yield up to 11% in drier years.
- Treatment
- deeper than normal placement of fertilizere0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 11%e0
- Qualifier
- drier years (345 mm and 356 mm rainfall)e0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deeper than normal placement of fertilizer gave up to an 11% increase in yield in the drier years (345 mm and 356 mm rainfall)”
t0“maize”
Claim · model-written summary
Deeper placement did not increase yield in the wetter year.
- Treatment
- deeper than normal placement of fertilizere1
- Outcome
- yielde1
- Qualifier
- wetter year (869 mm rainfall)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not in the wetter year (869 mm rainfall)”
e1“deeper than normal placement of fertilizer gave up to an 11% increase in yield”
t0“maize”
Claim · model-written summary
Deeper placement initially worsened plant growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deeper placement initially resulted in poorer plant growth”
t0“maize”
Claim · model-written summary
Deeper placement had the best plant growth at flowering.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“had the best plant growth at flowering”
e1“Deeper placement initially resulted in poorer plant growth”
t0“maize”
Claim · model-written summary
Deeper placement reduced tillering.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deeper placement also resulted in less tillering”
t0“maize”
The same questions in other papers
fertilization · yield · Zea mays (maize)Positive and negative results
3,484 papers in the same direction as this paper · 338 in the opposite direction · 85 reporting no difference from an alternative
- no effect
- positive
- positive
3,904 papers more in this group
See all 3,908 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.