Variety - Hidden Valley A538

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A538 is very precocious, and its good performance combined with moderately small trees size indicates that is has good potential for long term yield.

It is quite similar to A4 with a smaller kernel and smaller tree size.

Royalty StatusPBR Provisional Protection.(See Post)
Early Yield/Ha Very Precocious
Long Term Yield Good Potential
Kernel Recovery 43 - 46%
Whole Kernels 50 - 60%
Kernel Wt 2.7 - 3.2
First Grade 90 - 100%
Flower Season Late Season
Harvest Season Early to Mid
Tree Size Compact
Husk Spot Unknown
Sticktights Low
Ethrel Response Good
Abnormal Vertical (AVG)Appears Tolerant
Pollenisers Unknown

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Performance Details

A538 variety seems to perform best in the cooler climate of Alstonville.

Observed Benefits

  • A538 was one of the most precocious selections at all sites of the RVT 3.
  • Possible low susceptability to Felted Coccid

Observed Faults

The variety is in very early stages of adoption, no obvious faults have been observed at this stage.

  • The thin shell may be a lower barrier for some insect damage.
  • Its performance at RVT 3 site Wirra Willa, an AVG potential site, was poor.

Gross Income per Hectare in Trials

RVT Series 3 (RVT3) was a multi-region trial conducted on behalf of the Australian industry. It included a total of 30 genotypes as follows

  • Five industry Standards. The Standards at most sites were HAES 246, HAES 344, HAES 741, HAES 816 and HV A16. The exceptions were at Wirrawilla HAES 246 and HAES 741 were swapped with HAES 842 and HV A268; at Childers HAES 344 was not available.
  • 20 industry selections
  • Five Hidden Valley selections A376, A403, A422, A447 and A538 discussed in these pages.

Using the basic measure of Gross Income/Ha/Yr calculated from RVT3 data years 4 to 9 as basis for comparison, HV A538 performed as follows

  • Averaged across all sites it was $1,151/Ha ahead of the Standards by year nine of the trials.
  • Ahead of the Standards at all sites except Booyan, Bundy Sugar and Wirrawilla.
  • Acheived two site-specific Top 5 rankings, one site-specific Top 10 ranking, and an all-sites Top 10 ranking.
Gross Income/Ha/Yr in RVT3
Mean of Years 4 to 9, $5/kg base price
HV 538
Acc Gain
/Ha to Y9
5 or 10?
Alstonville $12,231 $9,922 $2,309$13,853Top 5
De Cortez (B1) $8,500 $7,908 $592$3,549Top 10
Booyan (B2) $10,144 $11,018-$874-$5,244
Wirrawilla (AVG) $8,271 $10,513-$2,242-$13,449
Childers (to yr 7) $15,586 $14,441$1,145$6,876Top 5
Mean All Sites $10,419 $10,227 $192 $1,151 Top 10

These charts provide year by year detail on the table above. The Orange/Green change in background colour indicates positive cash flow on a typical costs basis.

Gross Income vs Year at Alstonville
Gross Income vs Year at DeCortez
Gross Income vs Year at Booyan

Gross Income vs Year at Wirrawilla (AVG)
Gross Income vs Year at Childers

Harvest Patterns

(Yellow sections indicate hand strip)

Harvest Pattern at Alstonville 2017
Harvest Pattern at DeCortez 2017
Harvest Pattern at Booyan 2017

Our more detailed discussion of RVT Series 3 results is available here.

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Compared to HV A4, HV A538 has

  • a smaller nut
  • fewer leaf whorls with four leaves

Compared to HAES 246, HV A538 has

  • a more leaf spines

Compared to HAES 695, HV A538 has

  • flowers that are white instead of pink


Image of leaf and nut

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Some data and images courtesy of DAFF Qld. Data is compiled to best of our knowledge at the time of publication but errors are possible. Data presented is not a guarantee of performance in future orchards; real world performance is highly dependent on the combination of genetics, environment and management. Interpretation of the data presented and resulting decisions are entirely the grower's responsiblity.