Articles in Peer Reviewed Journals
Sikström, U., Hjelm, K., Holt Hanssen, K., Saksa, T. & Wallertz, K. 2020. Influence of mechanical site preparation on regeneration success of planted conifers in clearcuts in Fennoscandia – a review. Silva Fennica vol. 54 no. 2 article id 10172. Doi.org/10.14214/sf.10172
Hjelm, K., Nilsson, U., Johansson, U. & Per Nordin. 2019. Effects of mechanical site preparation and slash removal on long-term productivity of conifer plantations in Sweden. Canadian Journal of Forest Research. 49: 1311–1319. Doi.org/10.1139/cjfr-2019-0081
Nilsson, O., Hjelm, K. & Nilsson, U. 2019. Early growth of planted Norway spruce and Scots pine after site preparation in Sweden. Scandinavian Journal of Forest Research. Doi: 10.1080/02827581.2019.1659398
Hjelm K. & Rytter L. 2018. The demand of hybrid aspen (Populus tremula × P. tremuloides) on site conditions for a successful establishment on forest land. Silva Fennica vol. 52 no. 5 article id 10036. 14 p. Doi.org/10.14214/sf.10036
Böhlenius, H., Asp, H. & Hjelm, K. 2018. Differences in Al sensitivity affect establishment of Populus genotypes on acidic forest land. PLoS ONE 13(9):e0204461. Doi.org/10.1371/journal.pone.0204461
Hjelm, K., Mc Carthy, R. & Rytter, L. 2018 Establishment strategies for poplars, including mulch and plant types, on agricultural land in Sweden. New Forests 49:737-755. Doi.org/10.1007/s11056-018-9652-6
Wallertz, K., Björklund, N., Hjelm, K., Petersson, M. & Sundblad, L-G. 2018. Comparison of different site preparation techniques: quality of planting spots, seedling growth and pine weevil damage. New Forests 49:705-722. Doi.org/10.1007/s11056-018-9634-8
Nordlander, G., Mason, E.G., Hjelm K., Nordenhem H. & Hellqvist C. 2017. Influence of climate and forest management on damage risk by the pine weevil Hylobius abietis in northern Sweden. Silva Fennica 51:5 article id 7751. 20 p. Doi.org/10.14214/sf.7751
Mc Carthy, R., Rytter, L. & Hjelm, K. 2017. Effects of soil preparation methods and plant types on the establishment of poplars on forest land. Annals of Forest Science 74: 47. Doi:10.1007/s13595-017-0647-9
Drössler, L., Fahlvik, N., Wysocka, N., Hjelm, K. & Kuehne, C. 2017. Natural regeneration in a multi-layered Scots pine-Norway spruce forest in southern Sweden after target diameter harvest and soil scarification. Forests 8:35. Doi:10.3390/f8020035
Nordlander, G., Hellqvist, C. & Hjelm, K. 2017. Replanting conifer seedlings after pine weevil emigration in spring decreases feeding damage and seedling mortality. Scandinavian Journal of Forest Research 32:60-67. Doi:10.1080/02827581.2016.1186220
Holmström, E., Hjelm, K., Karlsson, M. & Nilsson, U. 2016. Scenario analysis of planting density and pre-commercial thinning: will the mixed forest have a chance? European Journal of Forest Research. 135:885. Doi:10.1007/s10342-016-0981-8
Holmström, E., Ekö, P.M., Hjelm, K., Karlsson, M. & Nilsson, U. 2016. Natural regeneration on planted clearcuts - the easy way to mixed forest. Open Journal of Forestry 6:281-294. Doi:10.4236/ojf.2016.64023
Hjelm, K. & Rytter, L. 2016. The influence of soil conditions, with focus on soil acidity, on the establishment of poplar (Populus spp.). New Forests 47:731-750. Doi:10.1007/s11056-016-9541-9
Wallertz, K., Holt Hanssen, K., Hjelm, K. & Sundheim Fløistad, I. 2016. Effects of planting time on pine weevil (Hylobius abietis) damage to Norway spruce seedlings. Scandinavian Journal of Forest Research 31:262-270. Doi:10.1080/02827581.2015.1125523
Holmström, E., Hjelm, K., Johansson, U., Karlsson, M., Valkonen, S. & Nilsson, U. 2016. Pre-commercial thinning, birch admixture and sprout management in planted Norway spruce stands in South Sweden. Scandinavian Journal of Forest Research 31:56-65. Doi:10.1080/02827581.2015.1055792.
Johansson, K., Hajek, J., Sjölin, O. & Normark E. 2015. Early performance of Pinus sylvestris and Picea abies – a comparison between seedling size, species and geographic location of the planting site. Scandinavian Journal of Forest Research 30:388-400. Doi:10.1080/02827581.2014.987808
Johansson, K., Ring, E. & Högbom, L. 2013. Effects of pre-harvest fertilization and subsequent soil scarification on the growth of planted Pinus sylvestris seedlings and ground vegetation after clear-felling. Silva Fennica 47. Doi:10.14214/sf.1016
Svensson, T., Högbom, L., Johansson K., Sandén P. & Ring, E. 2013. Effects of previous nitrogen addition on chlorine in forest soil, soil solution and biomass. Biogeochemistry 116:3-13. Doi:10.1007/s10533-013-9888-3.
Johansson, K., Nilsson, U. & Örlander, G. 2013. A comparison of long-term effects of scarification methods on the establishment of Norway spruce. Forestry 86:91–98. Doi:10.1093/forestry/cps062.
Johansson, K., Langvall, O. & Bergh, J. 2012. Optimization of environmental factors affecting initial growth of Norway spruce seedlings. Silva Fennica 46:27–38.
Nordlander, G., Hellqvist, C., Johansson, K. & Nordenhem, H. 2011. Regeneration of European boreal forests: Effectiveness of measures against seedling mortality caused by the pine weevil Hylobius abietis. Forest Ecology and Management 262:2354-2363.
Johansson, K., Nilsson, U. & Allen, H. L. 2007. Interactions between soil scarification and Norway spruce seedling types. New Forests 33:13-27.
Johansson, K., Örlander, G. & Nilsson, U. 2006. Effects of mulching and insecticides on establishment of Norway spruce. Canadian Journal of Forest Research 36:2377-2385.
Johansson, K., Söderbergh, I., Nilsson, U. & Allen, H. L. 2005. Effects of scarification and mulch on establishment and growth of six different clones of Picea abies. Scandinavian Journal of Forest Research 20:421-430.
