Abstract
The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland. There were 9 field experiments. In 8 separate experiments, 5 rates each of nitrogen (N), potassium (K), magnesium (Mg), sulfur, copper, zinc (Zn), boron or molybdenum fertilisers were banded into the soil. In the phosphorus (P) experiment, triple superphosphate and rock phosphate were compared, each with 5 rates of P banded, broadcast or spot-placed into the soil. After 2 wet seasons (66 weeks after planting), maximum tuber yields were produced by the banded application of 200 kg P/ha as triple superphosphate, 20 kg Mg/ha and 8 kg Zn/ha. With rock phosphate, only the broadcast placement produced an increase in the yield of cassava, maximum yields being achieved with 400 kg P/ha. In addition, there was evidence that 100 kg N/ha and 300 kg K/ha were needed for maximum yields. Therefore, based on the results of these individual experiments over 2 seasons, 100 kg N/ha, 200 kg P/ha as triple superphosphate or 400 kg P/ha as rock phosphate, 300 kg K/ha, 20 kg Mg/ha and 8 kg Zn/ha are the fertiliser recommendations for cassava grown in replaced soil at Weipa. In addition, early Zn deficiency symptoms (not related to any applied fertilisers) may necessitate a foliar spray of 4 kg Zn/ha as well as the soil-applied Zn fertiliser. However, the use of dolomite at 80 kg Mg/ha may have decreased the tuber yields and/or increased the requirements for certain soil-applied fertilisers. An average yield of 26.0 t/ha of tubers (fresh weight) was obtained with a 51-week growing season, and the recommended rates of fertilisers. This yield was reasonable when compared with 32 t/ha of fresh tubers predicted by a growth model for cassava, grown in North Queensland for 52 weeks without irrigation.
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Claims 12
Claim · model-written summary
Maximum cassava tuber yields were produced by banded application of 200 kg P/ha as triple superphosphate.
- Taxon
- cassava
Manihot esculentae0 - Treatment
- banded application of 200 kg P/ha as triple superphosphatee1
- Outcome
- maximum tuber yieldse1
- Direction
- maximume1
- Setting
- Weipa, Queenslande0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“maximum tuber yields were produced by the banded application of 200 kg P/ha as triple superphosphate, 20 kg Mg/ha and 8 kg Zn/ha”
Claim · model-written summary
Maximum cassava tuber yields were produced by 20 kg Mg/ha.
- Taxon
- cassavaManihot esculentae0
- Treatment
- 20 kg Mg/hae1
- Outcome
- maximum tuber yieldse1
- Direction
- maximume1
- Setting
- Weipa, Queenslande0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“maximum tuber yields were produced by the banded application of 200 kg P/ha as triple superphosphate, 20 kg Mg/ha and 8 kg Zn/ha”
Claim · model-written summary
Maximum cassava tuber yields were produced by 8 kg Zn/ha.
- Taxon
- cassavaManihot esculentae0
- Treatment
- 8 kg Zn/hae1
- Outcome
- maximum tuber yieldse1
- Direction
- maximume1
- Setting
- Weipa, Queenslande0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“maximum tuber yields were produced by the banded application of 200 kg P/ha as triple superphosphate, 20 kg Mg/ha and 8 kg Zn/ha”
Claim · model-written summary
With rock phosphate, only broadcast placement increased cassava yield.
- Taxon
- cassavaManihot esculentae0
- Treatment
- broadcast placemente1
- Compound
- rock phosphatee1
- Outcome
- yield of cassavae1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“With rock phosphate, only the broadcast placement produced an increase in the yield of cassava”
Claim · model-written summary
With rock phosphate, maximum cassava yields were achieved with 400 kg P/ha.
- Taxon
- cassavaManihot esculentae0
- Treatment
- 400 kg P/hae1
- Outcome
- maximum yieldse1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“maximum yields being achieved with 400 kg P/ha”
Claim · model-written summary
There was evidence that 100 kg N/ha was needed for maximum cassava yields.
- Taxon
- cassavaManihot esculentae0
- Treatment
- 100 kg N/hae1
- Outcome
- maximum yieldse1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“there was evidence that 100 kg N/ha and 300 kg K/ha were needed for maximum yields”
Claim · model-written summary
There was evidence that 300 kg K/ha was needed for maximum cassava yields.
- Taxon
- cassavaManihot esculentae0
- Treatment
- 300 kg K/hae1
- Outcome
- maximum yieldse1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“there was evidence that 100 kg N/ha and 300 kg K/ha were needed for maximum yields”
Claim · model-written summary
Recommended fertiliser rates for cassava in replaced soil at Weipa are 100 kg N/ha, 200 kg P/ha as triple superphosphate or 400 kg P/ha as rock phosphate, 300 kg K/ha, 20 kg Mg/ha and 8 kg Zn/ha.
- Taxon
- cassavaManihot esculentae0
- Outcome
- fertiliser recommendationse1
- Setting
- replaced soil at Weipae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“100 kg N/ha, 200 kg P/ha as triple superphosphate or 400 kg P/ha as rock phosphate, 300 kg K/ha, 20 kg Mg/ha and 8 kg Zn/ha are the fertiliser recommendations for cassava grown in replaced soil at Weipa”
Claim · model-written summary
Early Zn deficiency symptoms, not related to applied fertilisers, may necessitate a foliar spray of 4 kg Zn/ha in addition to soil-applied Zn.
- Taxon
- cassavaManihot esculentae0
- Outcome
- foliar spray of 4 kg Zn/hae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“early Zn deficiency symptoms (not related to any applied fertilisers) may necessitate a foliar spray of 4 kg Zn/ha”
Claim · model-written summary
Dolomite at 80 kg Mg/ha may have decreased cassava tuber yields.
- Taxon
- cassavaManihot esculentae0
- Treatment
- dolomite at 80 kg Mg/hae1
- Outcome
- tuber yieldse1
- Direction
- decreasede1
- Qualifier
- may havee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“the use of dolomite at 80 kg Mg/ha may have decreased the tuber yields”
Claim · model-written summary
The recommended fertiliser rates gave an average cassava tuber yield of 26.0 t/ha fresh weight over a 51-week growing season.
- Taxon
- cassavaManihot esculentae0
- Treatment
- recommended rates of fertiliserse1
- Outcome
- average yielde1
- Value
- 26.0 t/hae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“An average yield of 26.0 t/ha of tubers (fresh weight) was obtained with a 51-week growing season, and the recommended rates of fertilisers”
Claim · model-written summary
A growth model for cassava predicted 32 t/ha of fresh tubers for 52 weeks without irrigation in North Queensland.
- Taxon
- cassavaManihot esculentae1
- Outcome
- fresh tuberse1
- Value
- 32 t/hae1
- Setting
- North Queenslande1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield potential of cassava with optimal mineral nutrition was evaluated in a lateritic red earth that was replaced after bauxite mining at Weipa, Queensland”
e1“This yield was reasonable when compared with 32 t/ha of fresh tubers predicted by a growth model for cassava, grown in North Queensland for 52 weeks without irrigation”
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