Pub Date : 1999-11-01DOI: 10.1080/10295925.1999.9631234
A. Colton, M. Brink
SYNOPSIS A study of seven articulated wheel skidders was conducted at five different locations, where the winch line was pulled out for a distance of up to 60 metres from the skid trail. The further the winch line is pulled porn a skid trail to hitch a load, the further apart the skid trail spacing can be, with the resultant decrease in the negative effects of the skidder on the logging site. Winching skidder pay loads from beyond the usual 10 metres will involve a productivity and a cost penalty. The effect of a long winching distance on the productivity and cost of logging and its effect on the logging site is discussed.
{"title":"Better utilisation of the skidder winch can decrease the overrun on the logging site","authors":"A. Colton, M. Brink","doi":"10.1080/10295925.1999.9631234","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631234","url":null,"abstract":"SYNOPSIS A study of seven articulated wheel skidders was conducted at five different locations, where the winch line was pulled out for a distance of up to 60 metres from the skid trail. The further the winch line is pulled porn a skid trail to hitch a load, the further apart the skid trail spacing can be, with the resultant decrease in the negative effects of the skidder on the logging site. Winching skidder pay loads from beyond the usual 10 metres will involve a productivity and a cost penalty. The effect of a long winching distance on the productivity and cost of logging and its effect on the logging site is discussed.","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114193917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-11-01DOI: 10.1080/10295925.1999.9631238
P. Wate, S. Chamshama, A. Mugasha
SYNOPSIS A species and provenance trial for Eucalyptus (11 Eucalyptus camaldulensis provenances and 1 Eucalyptus tereticornis) was established at Michafutene, Mozambique in March 1982. Data on survival, growth, yield, stem characteristics and wood basic density have been analysed. Assessments were done at ages 6, 10 and 14 years for all variables except wood basic density which was only assessed 14 years after establishment. At all assessment occasions species/provenances differed significantly in survival, mean and dominant height, breast height diameter, basal area and basal area increment and stem form. The following outstanding species/provenances are recommended for small scale (pi1ot) planting at Michafutene and other areas with similar soil and climatic conditions: E. camaldulensis (Ex Zimbabwe), E. camaldulensis (Ex Isdell River), E. camaldulensis (Ex Emu Creek, Petford), E. camaldulensis (Ex Manning Creek, W. Gibb) and E. cmaldulensis (Ex Dunhum RW Kununurra). Further testing of some of these pro...
1982年3月，在莫桑比克的Michafutene建立了一项桉树种源试验(11个camaldulensis种源和1个tereticornis种源)。对成活率、生长、产量、茎秆特性和木材基本密度等数据进行了分析。在6岁、10岁和14岁时对所有变量进行评估，但木材基本密度仅在建立后14年进行评估。在各评估时段，种源在成活率、平均和优势高度、胸高直径、基面积和基面积增量、茎形态等方面存在显著差异。在Michafutene和其他具有类似土壤和气候条件的地区，推荐使用以下优秀的物种/种源进行小规模(中试)种植:E. camaldulensis (Ex Zimbabwe)、E. camaldulensis (Ex Isdell River)、E. camaldulensis (Ex Emu Creek, Petford)、E. camaldulensis (Ex Manning Creek, W. Gibb)和E. cmaldulensis (Ex Dunhum RW Kununurra)。进一步测试其中一些pro…
{"title":"The survival, growth and wood basic densities of 14 year old Eucalyptus camaldulensis at Michafutene, Mozambique","authors":"P. Wate, S. Chamshama, A. Mugasha","doi":"10.1080/10295925.1999.9631238","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631238","url":null,"abstract":"SYNOPSIS A species and provenance trial for Eucalyptus (11 Eucalyptus camaldulensis provenances and 1 Eucalyptus tereticornis) was established at Michafutene, Mozambique in March 1982. Data on survival, growth, yield, stem characteristics and wood basic density have been analysed. Assessments were done at ages 6, 10 and 14 years for all variables except wood basic density which was only assessed 14 years after establishment. At all assessment occasions species/provenances differed significantly in survival, mean and dominant height, breast height diameter, basal area and basal area increment and stem form. The following outstanding species/provenances are recommended for small scale (pi1ot) planting at Michafutene and other areas with similar soil and climatic conditions: E. camaldulensis (Ex Zimbabwe), E. camaldulensis (Ex Isdell River), E. camaldulensis (Ex Emu Creek, Petford), E. camaldulensis (Ex Manning Creek, W. Gibb) and E. cmaldulensis (Ex Dunhum RW Kununurra). Further testing of some of these pro...","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133305108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-11-01DOI: 10.1080/10295925.1999.9631237
O. Hofstad, P. L. Sankhayan
Ch.arcoal prices at uarious distances front Kotnpala and Dor es Salacun duri.ng 1994 I 95 uttcl. 1999 ort: u secl to test wltetlter shortages cutd grotuirtg detnand lead to price increases. T/t.i.s cl,ocs n.ot saun. to bt: tt'tt.t: i.tt. Tanzania, but (Jgandan prices increased sli,g/fi|y. Tlrc regressi.ort, coe.ffic:iert.t be.truee.rt, cl.istrtrtt:t: cutrl rcct,l cltarcoal price in Tanzania did not clLange signifi.cantly betuLeen 199'l ancl 1999. In, Ll,gctrt,cl.a. tlt.e sette coefficient changed from -27,92 to -33,49 irt 1995 and 1999, respectiuel.y. Trctnsport lt.as bcr:ort.c nt.ore expensiue per lzrn as against a stable pri.ce ctt hiln in (Jgondo. 7'lte cli.stcLrtce elusti.ci.ty of pri,c:t: i.s c1tt.i,'|.e si.tn.i.l.ar in t/rc two countries, and it l tas rernainecl almost unclrcmgecl ouer tlLe periocl.
{"title":"Prices of charcoal at various distances from Kampala and Dar es Salaam 1994–1999","authors":"O. Hofstad, P. L. Sankhayan","doi":"10.1080/10295925.1999.9631237","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631237","url":null,"abstract":"Ch.arcoal prices at uarious distances front Kotnpala and Dor es Salacun duri.ng 1994 I 95 uttcl. 1999 ort: u secl to test wltetlter shortages cutd grotuirtg detnand lead to price increases. T/t.i.s cl,ocs n.ot saun. to bt: tt'tt.t: i.tt. Tanzania, but (Jgandan prices increased sli,g/fi|y. Tlrc regressi.ort, coe.ffic:iert.t be.truee.rt, cl.istrtrtt:t: cutrl rcct,l cltarcoal price in Tanzania did not clLange signifi.cantly betuLeen 199'l ancl 1999. In, Ll,gctrt,cl.a. tlt.e sette coefficient changed from -27,92 to -33,49 irt 1995 and 1999, respectiuel.y. Trctnsport lt.as bcr:ort.c nt.ore expensiue per lzrn as against a stable pri.ce ctt hiln in (Jgondo. 7'lte cli.stcLrtce elusti.ci.ty of pri,c:t: i.s c1tt.i,'|.e si.tn.i.l.ar in t/rc two countries, and it l tas rernainecl almost unclrcmgecl ouer tlLe periocl.","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":" 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120827474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-11-01DOI: 10.1080/10295925.1999.9631243
S. Khalil, N. Labuschagne, M. Wingfield
SYNOPSIS A field survey of Pinus patula Schlecht. et Cham. plantations at Mondi's Mooi River Estate, Kwazulu-Natal, South Africa was conducted to assess the levels of ectomycorrhizal (EM) fungal colonisation. The objective was to determine whether the establishment problem (old land syndrome) is related to the quality and quantity of EM fungal colonisation of P. patula roots. EM colonisation was assessed in previously cultivated soils and compared to that in virgin soils at four sites. Mycorrhizal colonisation was higher in roots from virgin soil than in previously cultivated soils, although this difference was statistically significant at only two sites. Basidiomata of three EM fungi (Thelephora terrestris, Laccaria laccata and Boletus edulis) were collected from the plantations in virgin soil and one (T. terrestris) from the previously cultivated soil. Three types of EM fungal roots were identified from the survey area. These findings suggest that poor mycorrhizal development in previously cultivated so...
摘要:施莱希松(Pinus patula Schlecht)野外调查。可汗。在南非夸祖鲁-纳塔尔省Mondi's Mooi River Estate的种植园进行了研究，以评估外生菌根(EM)真菌定植的水平。目的是确定建立问题(旧土地综合征)是否与白杨根EM真菌定殖的质量和数量有关。EM定殖在先前耕作的土壤中进行了评估，并与四个地点的原始土壤进行了比较。在未开垦土壤中，菌根定植比在以前开垦过的土壤中更高，尽管这种差异仅在两个地点具有统计学意义。从未开垦的人工林中采集了3种EM真菌(地毡菌、lacaria laccata和Boletus edulis)的担子瘤，从已开垦的土壤中采集了1种EM真菌(地毡菌)的担子瘤。调查区发现三种类型的EM真菌根。这些发现表明，在先前培养的玉米中，菌根发育不良。
{"title":"Pinus patula establishment problem associated with poor ectomycorrhizal development in previously cultivated soils","authors":"S. Khalil, N. Labuschagne, M. Wingfield","doi":"10.1080/10295925.1999.9631243","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631243","url":null,"abstract":"SYNOPSIS A field survey of Pinus patula Schlecht. et Cham. plantations at Mondi's Mooi River Estate, Kwazulu-Natal, South Africa was conducted to assess the levels of ectomycorrhizal (EM) fungal colonisation. The objective was to determine whether the establishment problem (old land syndrome) is related to the quality and quantity of EM fungal colonisation of P. patula roots. EM colonisation was assessed in previously cultivated soils and compared to that in virgin soils at four sites. Mycorrhizal colonisation was higher in roots from virgin soil than in previously cultivated soils, although this difference was statistically significant at only two sites. Basidiomata of three EM fungi (Thelephora terrestris, Laccaria laccata and Boletus edulis) were collected from the plantations in virgin soil and one (T. terrestris) from the previously cultivated soil. Three types of EM fungal roots were identified from the survey area. These findings suggest that poor mycorrhizal development in previously cultivated so...","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115996286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-07-01DOI: 10.1080/10295925.1999.9631226
P. Wilson
Field-grown coppice shoots were harvested for stem cuttings from the stumps of 210 plus trees of Eucalyptus globulus on two sites in central Portugal. There was high variation between stumps in coppicing ability and in the initial survival and rooting of surviving cuttings under open mist. Rooted cuttings of high-rooting clones were established as potted mother plants in the nursery. Cuttings harvested from these plants had higher survival than coppice cuttings but, on average, comparable rooting ability of the survivors. Clone x mother plant type interactions were insignificant for survival but strong for rooting.
{"title":"Developing clones from field-grown coppice of Eucalyptus globulus by stem cuttings propagation","authors":"P. Wilson","doi":"10.1080/10295925.1999.9631226","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631226","url":null,"abstract":"Field-grown coppice shoots were harvested for stem cuttings from the stumps of 210 plus trees of Eucalyptus globulus on two sites in central Portugal. There was high variation between stumps in coppicing ability and in the initial survival and rooting of surviving cuttings under open mist. Rooted cuttings of high-rooting clones were established as potted mother plants in the nursery. Cuttings harvested from these plants had higher survival than coppice cuttings but, on average, comparable rooting ability of the survivors. Clone x mother plant type interactions were insignificant for survival but strong for rooting.","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117248516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-07-01DOI: 10.1080/10295925.1999.9631228
J. Louw
The intensive nature of the South African forest industry requires reliable decision support systems to enhance site-specific silviculture. Furthermore, the principle of ecologically sustainable forest management requires a profound improvement in the understanding of the factors controlling tree growth and the limitations of the sites on which they are planted. The lack of quantitative evaluation systems for accurate site-species matching necessitated South African forest researchers to develop site-growth models to initiate the development of plantation decision support systems. The objectives, principles and procedures for developing site-growth models are discussed, together with the main advantages and disadvantages of implementing such models on operational forest management levels. Recommendations for a future strategy in site-growth studies are provided. The simulation of ecological processes influencing tree growth will, in future, receive preference over the use of discrete site variables to pre...
{"title":"A review of site-growth studies in South Africa","authors":"J. Louw","doi":"10.1080/10295925.1999.9631228","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631228","url":null,"abstract":"The intensive nature of the South African forest industry requires reliable decision support systems to enhance site-specific silviculture. Furthermore, the principle of ecologically sustainable forest management requires a profound improvement in the understanding of the factors controlling tree growth and the limitations of the sites on which they are planted. The lack of quantitative evaluation systems for accurate site-species matching necessitated South African forest researchers to develop site-growth models to initiate the development of plantation decision support systems. The objectives, principles and procedures for developing site-growth models are discussed, together with the main advantages and disadvantages of implementing such models on operational forest management levels. Recommendations for a future strategy in site-growth studies are provided. The simulation of ecological processes influencing tree growth will, in future, receive preference over the use of discrete site variables to pre...","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116174571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-07-01DOI: 10.1080/10295925.1999.9631225
M. H. Hettasch, S. Verryn
A repeatability study of tree height, diameter at breast height (DBH), stem and crown form assessments was undertaken. Trees were measured four times by two independent teams. The repeatability of the five traits was estimated. The effect of repeatability on the heritability of the traits was determined. In order to obtain an indication of the feasibility of repeating measurements, the genetic gains were calculated for a hypothetical breeding population. The Best Linear Prediction (BLP) rankings of the four repetitions of the measurements were compared, with selection being based on volume, stem and crown. The repeatabilities for height (0,81), DBH (0,98) and volume (0,97) were high and the heritabilities of these traits showed only small increases with repeated measurements. Stem and crown form which were scored on a subjective scale, showed a repeatability of 0,61 and 0,62 respectively. Repeating scoring of these traits lead to bigger increases in the heritability with repeated measurements. Increases i...
{"title":"A repeatability study of trait assessment in a Pinus patula breeding programme","authors":"M. H. Hettasch, S. Verryn","doi":"10.1080/10295925.1999.9631225","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631225","url":null,"abstract":"A repeatability study of tree height, diameter at breast height (DBH), stem and crown form assessments was undertaken. Trees were measured four times by two independent teams. The repeatability of the five traits was estimated. The effect of repeatability on the heritability of the traits was determined. In order to obtain an indication of the feasibility of repeating measurements, the genetic gains were calculated for a hypothetical breeding population. The Best Linear Prediction (BLP) rankings of the four repetitions of the measurements were compared, with selection being based on volume, stem and crown. The repeatabilities for height (0,81), DBH (0,98) and volume (0,97) were high and the heritabilities of these traits showed only small increases with repeated measurements. Stem and crown form which were scored on a subjective scale, showed a repeatability of 0,61 and 0,62 respectively. Repeating scoring of these traits lead to bigger increases in the heritability with repeated measurements. Increases i...","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123117179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-07-01DOI: 10.1080/10295925.1999.9631220
F. Prinsloo, D. Scott
The changes in streamflow following the removal of invasive wattle (Acacia mearnsii and A. longifolia) from riparian zones during the dry summer months in three small catchments in the Western Cape Province are described. Portable steel box weirs, with a 30° compound V-notch and equipped with Belfort water level recorders, were used to measure streamflow. Each of the three streams had a control catchment against which it was correlated during a pre-treatment period. The riparian zones of the treatment catchments were cleared after this period of calibration, and the response of stream-flow after treatment was recorded. In the three catchments there was a marked increase in streamflow after clearing of the riparian invasive vegetation. The streamflow increases in the three catchments were 8,8, 10,4 and 12 m3/day per ha cleared. The responses measured in these experiments are the result of changing from tall vegetation to minimal cover and represent a maximum response. Streamflow is expected to decrease aga...
{"title":"Streamflow responses to the clearing of alien invasive trees from riparian zones at three sites in the Western Cape Province","authors":"F. Prinsloo, D. Scott","doi":"10.1080/10295925.1999.9631220","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631220","url":null,"abstract":"The changes in streamflow following the removal of invasive wattle (Acacia mearnsii and A. longifolia) from riparian zones during the dry summer months in three small catchments in the Western Cape Province are described. Portable steel box weirs, with a 30° compound V-notch and equipped with Belfort water level recorders, were used to measure streamflow. Each of the three streams had a control catchment against which it was correlated during a pre-treatment period. The riparian zones of the treatment catchments were cleared after this period of calibration, and the response of stream-flow after treatment was recorded. In the three catchments there was a marked increase in streamflow after clearing of the riparian invasive vegetation. The streamflow increases in the three catchments were 8,8, 10,4 and 12 m3/day per ha cleared. The responses measured in these experiments are the result of changing from tall vegetation to minimal cover and represent a maximum response. Streamflow is expected to decrease aga...","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130234930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-07-01DOI: 10.1080/10295925.1999.9631229
M. Falcão
In a recent study (1998) the minimum required yield for profitable sawtimber production from Pinus patula in the escarpment area of Mpumalanga was established. Net Present Value was used as financial profitability criterion. All cost components were 1996 costs (the latest available at the commencement of the study) derived from the cost monitoring system of Forestry Economics Services. The prices of pulpwood and sawlogs were 1996 prices used in the study area. The prime overdraft rate from 1978 to 1997, used by a major South African bank, was used to estimate the Nominal Cost of Capital as 17%. By making use of trend analysis the long-term inflation rate was estimated as 13%. Based on these two estimated values, a Real Cost of Capital of 3,5% was calculated and used in the study. Two other scenarios were also used (a low Real Cost of Capital of 2,0% and a high Real Cost of Capital of 5,0%) to determine the minimum required yield. The results showed that a minimum Mean Annual Increment at 20 years of age o...
{"title":"The minimum required yield for profitable sawtimber production from Pinus patula in the escarpment area of Mpumalanga","authors":"M. Falcão","doi":"10.1080/10295925.1999.9631229","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631229","url":null,"abstract":"In a recent study (1998) the minimum required yield for profitable sawtimber production from Pinus patula in the escarpment area of Mpumalanga was established. Net Present Value was used as financial profitability criterion. All cost components were 1996 costs (the latest available at the commencement of the study) derived from the cost monitoring system of Forestry Economics Services. The prices of pulpwood and sawlogs were 1996 prices used in the study area. The prime overdraft rate from 1978 to 1997, used by a major South African bank, was used to estimate the Nominal Cost of Capital as 17%. By making use of trend analysis the long-term inflation rate was estimated as 13%. Based on these two estimated values, a Real Cost of Capital of 3,5% was calculated and used in the study. Two other scenarios were also used (a low Real Cost of Capital of 2,0% and a high Real Cost of Capital of 5,0%) to determine the minimum required yield. The results showed that a minimum Mean Annual Increment at 20 years of age o...","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123917286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-07-01DOI: 10.1080/10295925.1999.9631222
C. Kätsch, Holger Vogt
Past studies have suggested that sound knowledge about the reflectance characteristics of objects could be of great value in understanding the physical, chemical, and the spatial properties of features on our planet. These characteristics can be assessed remotely, and the available techniques hold considerable promise for the inventory and monitoring of natural resources. However, a significant lack of information concerning the full potential of this recent technology has resulted in an inadequate appreciation of the many possible applications in various domains. This paper presents the current situation regarding the development of satellite remote sensing technology within the fields of forestry, nature conservation, and landscape management in terms of resource assessment and monitoring. Future applications are reported on by having a closer look at the new generation of sensor systems and satellites, since methods currently used for environmental monitoring and resource survey appear to be fairly ina...
{"title":"Remote sensing from space—present and future applications in forestry, nature conservation and landscape management","authors":"C. Kätsch, Holger Vogt","doi":"10.1080/10295925.1999.9631222","DOIUrl":"https://doi.org/10.1080/10295925.1999.9631222","url":null,"abstract":"Past studies have suggested that sound knowledge about the reflectance characteristics of objects could be of great value in understanding the physical, chemical, and the spatial properties of features on our planet. These characteristics can be assessed remotely, and the available techniques hold considerable promise for the inventory and monitoring of natural resources. However, a significant lack of information concerning the full potential of this recent technology has resulted in an inadequate appreciation of the many possible applications in various domains. This paper presents the current situation regarding the development of satellite remote sensing technology within the fields of forestry, nature conservation, and landscape management in terms of resource assessment and monitoring. Future applications are reported on by having a closer look at the new generation of sensor systems and satellites, since methods currently used for environmental monitoring and resource survey appear to be fairly ina...","PeriodicalId":228456,"journal":{"name":"The Southern African Forestry Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129597138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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