Net profits of 10-45 % with apple and 12-162 % with pear were calculated, if the wind-breaks were 4-6 h away (h = height of the wind-break). The analysis showed that wind-breaking had an important influence on fruit-setting. Higher mean temperature and humidity in sheltered places may favour pollination and fertilization. Therefore, the recommendation to plant more wind-breaks than usual should be accompanied by advice on planting of wind-break trees coming into leaf before blossom time.
Strawberries yielded significantly more and were much more profitable in sheltered areas. With early potato, higher revenues were obtained only by promoting earliness, perhaps through 'hothouse' conditions in the sheltered zone.
Smaller increases in yield were found for field crops in a zone of nearby 10 h away from the wind-break.
|Qualification||Doctor of Philosophy|
|Award date||24 Jun 1959|
|Place of Publication||Arnhem|
|Publication status||Published - 1959|
- fruit growing
- fruit trees
- wind protection
- plant protection
- pest control
- climatic factors
- meteorological factors