Abstract
The occurrence of manganese deficiency in citrus on an experimental orchard established in light horticultural soil in the Murrumbidgee Irrigation Area is reported. There is a relationship between visual symptoms of deficiency and the amount of manganese in the leaf. When the leaf manganese falls to 20 p.p.m., 50 per cent. of the trees show visual deficiency symptoms. Trees on Sweet Orange stock had less manganese and showed more visual deficiency symptoms than trees on Rough Lemon stock. A decrease in soil pH consequent on the addition of ammonium sulphate fertilizer led to a graduated increase in exchangeable soil manganese and leaf manganese. Bringing the calcareous subsoil to the surface consequent on digging trenches for laying agricultural drains led to acute manganese deficiency. Trees on plots tilled during the summer have greater leaf manganese contents than trees on sod plots or plots not tilled but kept free of weeds by herbicidal sprays, but these cultural treatments do not affect the exchangeable soil manganese. Possible reasons for the differences are discussed.
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Claims 10
Claim · model-written summary
Manganese deficiency occurred in citrus at the experimental orchard.
CitrusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The occurrence of manganese deficiency in citrus on an experimental orchard established in light horticultural soil in the Murrumbidgee Irrigation Area is reported.”
Claim · model-written summary
Leaf manganese content was related to visual deficiency symptoms.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There is a relationship between visual symptoms of deficiency and the amount of manganese in the leaf.”
t0“citrus”
Claim · model-written summary
At 20 p.p.m. leaf manganese, 50 per cent of trees showed deficiency symptoms.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the leaf manganese falls to 20 p.p.m., 50 per cent. of the trees show visual deficiency symptoms.”
t0“citrus”
Claim · model-written summary
Sweet Orange rootstock had less leaf manganese than Rough Lemon rootstock.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trees on Sweet Orange stock had less manganese and showed more visual deficiency symptoms than trees on Rough Lemon stock.”
t0“citrus”
Claim · model-written summary
Sweet Orange rootstock had more visual deficiency than Rough Lemon.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trees on Sweet Orange stock had less manganese and showed more visual deficiency symptoms than trees on Rough Lemon stock.”
t0“citrus”
Claim · model-written summary
Ammonium sulphate fertilizer increased exchangeable soil manganese as pH declined.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in soil pH consequent on the addition of ammonium sulphate fertilizer led to a graduated increase in exchangeable soil manganese and leaf manganese.”
t0“citrus”
Claim · model-written summary
Ammonium sulphate fertilizer increased leaf manganese as pH declined.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in soil pH consequent on the addition of ammonium sulphate fertilizer led to a graduated increase in exchangeable soil manganese and leaf manganese.”
t0“citrus”
Claim · model-written summary
Bringing calcareous subsoil to the surface caused acute manganese deficiency.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bringing the calcareous subsoil to the surface consequent on digging trenches for laying agricultural drains led to acute manganese deficiency.”
t0“citrus”
Claim · model-written summary
Summer tillage raised leaf manganese relative to sod and herbicide-managed plots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trees on plots tilled during the summer have greater leaf manganese contents than trees on sod plots or plots not tilled but kept free of weeds by herbicidal sprays”
t0“citrus”
Claim · model-written summary
The cultural treatments did not affect exchangeable soil manganese.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these cultural treatments do not affect the exchangeable soil manganese”
t0“citrus”
The same questions in other papers
ammonium sulfate · nutrient: content · CitrusPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
fertilization · nutrient: content · CitrusPositive and negative results
27 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- no effect
28 papers more in this group
See all 32 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.