Stikstofvoeding, bodembehandeling en stikstofbemesting bij vruchtbomen (appel, peer)

P. Delver

Research output: Thesisinternal PhD, WU


Due to the increased use of dwarfing rootstocks and fertilizer experiments dressings increased from 90-120 kg N/ha in 1958 to 170-270 kg in 1965. In deciding on the quantity of nitrogen dressing its interacting effects on growth and fruit production as well as the influence of soil, weather and undergrowth were studied. Some of the experiments were carried out in pots, the others in the field.

The discussions cover the availability of nitrogen in the soil and the nitrogen requirements of the trees, especially in relation to competition with a full grass cover and grass strips. The system with grass strips and mulched bare tree strips is considered a case of fertilizer placement since the soil under the grass strip is extremely low in nitrogen during the greater part of the season.

Original languageDutch
QualificationDoctor of Philosophy
Awarding Institution
  • Schuffelen, A.C., Promotor, External person
Award date1 Jun 1973
Place of PublicationWageningen
Print ISBNs9789022004326
Publication statusPublished - 1973


  • apples
  • fertilizers
  • manures
  • nitrogen
  • nitrogen fertilizers
  • pears
  • plant nutrition
  • soil

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