Articles
FOLIAR FERTILIZERS ON HAZELNUTS IN OREGON, USA
Article number
845_53
Pages
349 – 352
Language
English
Abstract
The objective of this three year research study was to determine if the use of foliar fertilizer programs increase hazelnut yields in a cost effective manner.
A randomized complete block experimental design was used with four replications of 24 trees plot size (80 ft × 120 ft or 27 × 37 m) per treatment.
The overall research plot size for the experiment was 3.6 hectares.
The trunk cross sectional area was recorded for every tree in the plot to quantify uniformity of the trial orchard.
Six different foliar fertilizer product mixes were applied in May, June and July.
Foliar fertilizer applications were made with the growers Rears Airblast Sprayer using 75 gallons of water per acre (702 L/ha) at 150 pounds per square inch (10.5 kg/cm2) through four D7 orifice plates on each side of the sprayer.
The forward speed of the tractor was 4 miles per hour (6.4 km/h). The six treatments were: 1) Foliar Advance + Break Thru, 2) Multi Mineral Metalosate, 3) Stimplex + Break Thru, 4) Nutrient Express 4-41-27 or 18-18-18 + Calexin + ZMC Express, 5) Foliar Gold + Integrity Ca + Z422 + Phortress + K-Nite + Break Thru, 6) Kelpgrow and 7) an untreated check plot.
At the time of harvest the yield was continuously monitored using a tractor mounted Global Positioning System (GPS) and a pressure plate yield monitoring device installed on the harvester.
There were no statistically significant differences in yield, nut weights or grades for any of the treatments compared to the untreated check in any of the three years of the study.
A randomized complete block experimental design was used with four replications of 24 trees plot size (80 ft × 120 ft or 27 × 37 m) per treatment.
The overall research plot size for the experiment was 3.6 hectares.
The trunk cross sectional area was recorded for every tree in the plot to quantify uniformity of the trial orchard.
Six different foliar fertilizer product mixes were applied in May, June and July.
Foliar fertilizer applications were made with the growers Rears Airblast Sprayer using 75 gallons of water per acre (702 L/ha) at 150 pounds per square inch (10.5 kg/cm2) through four D7 orifice plates on each side of the sprayer.
The forward speed of the tractor was 4 miles per hour (6.4 km/h). The six treatments were: 1) Foliar Advance + Break Thru, 2) Multi Mineral Metalosate, 3) Stimplex + Break Thru, 4) Nutrient Express 4-41-27 or 18-18-18 + Calexin + ZMC Express, 5) Foliar Gold + Integrity Ca + Z422 + Phortress + K-Nite + Break Thru, 6) Kelpgrow and 7) an untreated check plot.
At the time of harvest the yield was continuously monitored using a tractor mounted Global Positioning System (GPS) and a pressure plate yield monitoring device installed on the harvester.
There were no statistically significant differences in yield, nut weights or grades for any of the treatments compared to the untreated check in any of the three years of the study.
Publication
Authors
J.L. Olsen, J.F. Cacka
Keywords
hazelnut production, fertilizer sprays, micronutrients, macronutrients
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