Results 181 to 190 of about 3,827 (198)
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Above-ground phytomass of a tropical deciduous forest on the coast of Jalisco, México
Journal of Tropical Ecology, 1992ABSTRACT Phytomass was determined for a tropical deciduous forest in Chamela, Jalisco, México. The mean canopy height was 6.9 m, and the total basal area was 25.6 m2 ha−1 (dbh > 3.0 cm). The estimated phytomass for this forest (85 Mg ha−1) is among the highest values for tropical dry forests with similar seasonal climates.
Angelina Martinez-Yrizar +6 more
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Biomass and Bioenergy, 1996
Abstract Above-ground phytomass and light regime in Norway spruce stands, planted with different initial density (from 0.8 to 200,000 trees ha −1 ) have been investigated. Two phases of needle mass increment (open-growth and after crown closure, i.e. ecosystem formation) have been singled out.
R. Ozolinčius, V. Mikšys, V. Stakénas
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Abstract Above-ground phytomass and light regime in Norway spruce stands, planted with different initial density (from 0.8 to 200,000 trees ha −1 ) have been investigated. Two phases of needle mass increment (open-growth and after crown closure, i.e. ecosystem formation) have been singled out.
R. Ozolinčius, V. Mikšys, V. Stakénas
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Journal of Vegetation Science, 1996
Abstract. Long‐term after effects on species number and productivity in calcareous grassland were analyzed after cessation of fertilization. Three series of permanent plots were monitored yearly from 1971 to 1993. These series differed in duration of fertilization and in fertilizer composition, notably the amount of nitrogen and phosphorus.Yearly ...
J.H Willems, M.G.L van Nieuwstadt
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Abstract. Long‐term after effects on species number and productivity in calcareous grassland were analyzed after cessation of fertilization. Three series of permanent plots were monitored yearly from 1971 to 1993. These series differed in duration of fertilization and in fertilizer composition, notably the amount of nitrogen and phosphorus.Yearly ...
J.H Willems, M.G.L van Nieuwstadt
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Species composition and above ground phytomass in chalk grassland with different management
Vegetatio, 1983During the last decades chalk grasslands lost their agricultural importance in the greater part of their distribution area in W Europe. Due to their botanical richness a number of chalk grassland sites were established as Nature Reserve. As a consequence of the semi-natural character of these grasslands an appropriate management is necessary to ...
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Remote Sensing of Environment, 1989
Spectral reflectance factors were measured for paddy rice canopies in the visible (VIS), reflective near-infrared (NIR), and mid-infrared (MIR) wavelength regions. Radiometric and agronomic measurements were performed every other week from 45 days before heading to 64 days after heading in early- and late-planted rice plots consisting of five cultivars.
Michio Shibayama, Tsuyoshi Akiyama
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Spectral reflectance factors were measured for paddy rice canopies in the visible (VIS), reflective near-infrared (NIR), and mid-infrared (MIR) wavelength regions. Radiometric and agronomic measurements were performed every other week from 45 days before heading to 64 days after heading in early- and late-planted rice plots consisting of five cultivars.
Michio Shibayama, Tsuyoshi Akiyama
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Botanical Journal of Scotland, 1993
Summary The above-ground standing crop of an Agrostis-with-Festuca grassland near Cabrach, Banff, was measured nine times in a 16-month period by harvesting sample plots. Standing crop peaked in late summer when the weight of live graminoid phytomass reached its seasonal maximum.
Martin A. Ford, Fred Wilson
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Summary The above-ground standing crop of an Agrostis-with-Festuca grassland near Cabrach, Banff, was measured nine times in a 16-month period by harvesting sample plots. Standing crop peaked in late summer when the weight of live graminoid phytomass reached its seasonal maximum.
Martin A. Ford, Fred Wilson
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Equations for Estimating Above-Ground Phytomass in the Understory of Appalachian Oak Forests [PDF]
, 2019 We would like to acknowledge the support of the Virginia Agricultural Foundation, McIntire-Stennis Co-operative Forestry Research Fund, U. S. Forest Service Region 8, and, in particular, personnel of the Jefferson National Forest.
Martin, Wayne L. +3 more
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Journal of Tropical Ecology, 2002
The amount and annual net accumulation of above-ground dead woody material were quantified in a tropical deciduous forest in western Mexico. Three plots were located within a small watershed (16 ha) and distributed along a 150-m-elevation gradient (Upper, Middle and Lower plot). Total amount of above-ground dead phytomass (fine + coarse) was 27.2 Mg ha-
J. Manuel Maass +3 more
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The amount and annual net accumulation of above-ground dead woody material were quantified in a tropical deciduous forest in western Mexico. Three plots were located within a small watershed (16 ha) and distributed along a 150-m-elevation gradient (Upper, Middle and Lower plot). Total amount of above-ground dead phytomass (fine + coarse) was 27.2 Mg ha-
J. Manuel Maass +3 more
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African Journal of Range and Forage Science, 1991
A technique to quantify available above-ground phytomass of grass tufts in defoliation studies is described. Highly significant correlations were found between tuft volume and above-ground phytomass in eighteen out of twenty-two species that were examined. Tuft volume can therefore be used to calculate the above-ground phytomass of a tuft.
J.J., Jordaan +2 more
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A technique to quantify available above-ground phytomass of grass tufts in defoliation studies is described. Highly significant correlations were found between tuft volume and above-ground phytomass in eighteen out of twenty-two species that were examined. Tuft volume can therefore be used to calculate the above-ground phytomass of a tuft.
J.J., Jordaan +2 more
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Лесные экосистемы в условиях изменения климата: биологическая продуктивность и дистанционный мониторинг
В статье исследована динамика наземной фитомассы лесов Пензенской области за период с 1985 по 2023 год с использованием спутниковых данных Landsat. Основное внимание уделяется разработке и оценке алгоритма Random Forest (RF) на платформе Google Earth Engine (GEE) для создания карт фитомассы.
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В статье исследована динамика наземной фитомассы лесов Пензенской области за период с 1985 по 2023 год с использованием спутниковых данных Landsat. Основное внимание уделяется разработке и оценке алгоритма Random Forest (RF) на платформе Google Earth Engine (GEE) для создания карт фитомассы.
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