Field Trial - Grapes, (Sultanas, Sunred, Alphons Lavalee, Dauphine), Remhoogte, Riebeek Kasteel, South Africa

Date/Datum July 1998 - January 1999
Product/Produk Yield-Plus
Crop/Oes Type/Tipe Grapes
Variety/Varieteit Sultanas, Sunred, Alphons Lavalee, Dauphine
Locale/Plek Remhoogte, Riebeek Kasteel, South Africa
Rainfall/
Reenval
Winter/
Winter
Summer/
Somer
  Ave. mm pa/
Gem. mm pj
 
Soil quality/
Grond gehalte
Excellent/
Uitstekend
Good/
Goed
  Medium/
Gemiddeld
  Poor/
Arm
 
Normal weather conditions/
Gewone weerstoestande
Mild. wet winters
Hot, dry summers
Test period weather conditions other than normal/
Toets periode weersomstandighede buitengewoon
Cold spell in early spring which generally sets crops back in the whole area
Cooperator/Samewerker Mr D Vlok
Type of trial/Proeftipe Production Field
Experimental design/
Proefnemings ontwerp
2.8 ha Sunred
3 ha Sultanas
2 ha Alphons Lavalee
2 ha Dauphine
Treated with Yield-Plus
Yields and grades compared with previous year
Treatments/Behandelinge 300 ml when new shoots were 250mm long
400 ml fourteen days later
400 ml fourteen days later
400 ml fourteen days later
20 % more fertiliser was given to compliment increased development of the plants
Applications/
Toedienings
Qty/Hoeveelheid Four, total of 1500 ml
Form/Vorm Tractor spray
Counts/Tellings At harvest, number of 4.5 kg boxes packed
Results/Uitslae
  Quality Grading Total Yield
  Grade 1 Grade 2  
  1998 1999 1998 1999 1998 1999 Increase
Sunred 3777 (60%) 11200 (91%) 2450 (40%) 1050 (9%) 6227 12250 97%
Sultanas 137 (1%) 14000 (87%) 9300 (99%) 2100 (13%) 9437 16100 71%
Alphons Lavalee 5050 (83%) 6500 (93%) 1000 (17%) 480 (7%) 6050 6980 15%
Dauphine 1489 (37%) 5000 (86%) 2500 (63%) 800 (14%) 3989 5800 45%
Conclusion/Gevolgtrekking Both yield and quality were substantially improved upon compared to the previous year.
Grape producers in the area (not Yield-Plus treated) experiencd problems with quality and lower yield.
The treated crops were harvested between one and two weeks earlier than the rest of the area.
Special comments/
Spesiale opmerkings
The increased quality and earlier harvest enables Mr Vlok to realise approximately R 15 per box more than the average
Notes/Notas  

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