organic fertilization of red raspberry cv. ‘glen ample’, in polyethylene tunnels in norway by

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Organic Fertilization of Red Raspberry cv. ‘Glen Ample’, in Polyethylene Tunnels in Norway By Rolf Nestby: Norwegian Institute for Agricultural and Environmental Research, Grasland and Landscape Division, Kvithamar, 7500 Stjørdal, Norway. Ingrid Myrstad: The Norwegian Agricultural Extension Service (LFR), 9410 Borkenes, Norway.

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Organic Fertilization of Red Raspberry cv. ‘Glen Ample’, in

Polyethylene Tunnels in Norway

By

 Rolf Nestby: Norwegian Institute for Agricultural and Environmental Research, Grasland and Landscape 

Division, Kvithamar, 7500 Stjørdal, Norway. Ingrid Myrstad: The Norwegian Agricultural Extension 

Service (LFR), 9410 Borkenes, Norway.

Challenges and frames of the project

• Experiments in fields at 62 , 65 and 68 °N• These fields have very different soils.• Challenge to cover nutrient needs with organic fertilizers, especially considering fertigation.

• Project period 2007 to 2010.• Financed by the Norwegian Research Council• Fertilization is one of four objectives of the project.

The field at 62 °N , Innvik, NorwayMineral soil  - pH 5.7P-K-Mg-Ca:    23.9 5.2 7.2 107   (Al-methode)

The field at 65 °N , Brønnøysund, Norway

Mineral soil – pH 7.7 (sandy loam)P-K-Mg-Ca:    12 10 330 9000

The field at 68°N, Harstad, Norway.

Mineral soil with  40% organic matterP-k-Mg-Ca:  44-29    33-12  76- 67   426-369

Potassium deficiency at 68 °NSummer 2007

Management

Fertilizers• Agromarin – Based on 

organic  material from Marin and Agriculture sources. (6.5- 4-4)

• Marihøne Pluss – Based on bone powder and vinasse (8-3-3).

• OASE for fertigation (8-4-6)

Levels of N• 9, 13,17• Other macro nutrients are 

balanced to level of N.• Solid fertilizer are given in 

spring and mid summer.• Fertigation from mid 

summer to end of harvest.

Conclusion

• Registrations in 2007 showed small effects in growth and yield.

• Deficiency symptoms observed in two fields (K, Mn, Fe).• Only one field was fully grown in 2007.• The experiments 2008-2010 will be better balanced.• Testing of fertilizers for fertigation will be undertaken