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LEAF AREA INDEX: DEFINITION AND IMPORTANCE IN CROP …

Updated 8 months ago

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Leaf area (m2)/ Ground area (m2) = m2/m2. Direct methods can involve direct measurements on the leaf. In order to simplify the process we can also assume a specific geometric figure in order to simplify the process. For example, in tomatoes we can measure length and width in order to get an idea of an average leaf area in the plant. Ground area ... ...

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LEAF AREA INDEX - AN OVERVIEW | SCIENCEDIRECT TOPICS

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Leaf area index (LAI), one half the total green leaf area per unit horizontal ground surface, is an important structural property of vegetation. Because leaf surfaces are the primary border of energy and mass exchange, important processes such as canopy interception, evapotranspiration, and gross photosynthesis are directly proportional to LAI. ...

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WHAT IS LEAF AREA INDEX (LAI)? - DEFINITION FROM MAXIMUM …

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Leaf area (LAI) is a form of measurement that takes into consideration the total leaf area determined per unit of ground area. Determining the LAI lets researchers learn about the atmosphere, vegetation growth, radiation uptake, energy conversion, precipitation, and gas exchange. The vegetation on a deciduous tree is predominantly the leaf area. ...
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LEAF AREA INDEX (LAI): THE RESEARCHER'S COMPLETE GUIDE

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Leaf area index (LAI) quantifies the amount of leaf material in a canopy. By definition, it is the ratio of one-sided leaf area per unit ground area. LAI is unitless because it is a ratio of areas. For example, a canopy with an LAI of 1 has a 1:1 ratio of leaf area to ground area (Figure 1a). ...

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LEAF AREA INDEX: DEFINITION AND IMPORTANCE IN CROP PRODUCTION

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Leaf area index (LAI) is a key variable used in horticultural studies involving the relation between crop growth and yield. This variable can be a very useful tool when looking to evaluate the performance of your crop. ...

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LEAF AREA INDEX - OXFORD REFERENCE

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Leaf area index - Oxford Reference Overview leaf area index Quick Reference (LAI) The total surface area of the leaves of plants in a given area divided by the area of ground covered by the plants. In an area of dense vegetation, such as a forest, the LAI will be high. From: leaf area index in A Dictionary of Biology » ...

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AN OVERVIEW OF GLOBAL LEAF AREA INDEX (LAI): METHODS, …

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Leaf area index (LAI) is a critical vegetation structural variable and is essential in the feedback of vegetation to the climate system. The advancement of the global Earth Observation has enabled the development of global LAI products and boosted global Earth system modeling studies. ...

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DEFINITION LEAF AREA INDEX IS DEFINED AS ONE

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DEFINITION LEAF AREA INDEX is defined as one half the total foliage surface area ...

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VEGETATION INDICES AS A SATELLITE-BASED ADD-ON FOR AGRI …

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Leaf Area Vegetation Index (LAI) The LAI index is designed to analyze the foliage surface of our planet and it estimates the quantity of leaves in a specific region. LAI is a unitless measure that is calculated as the ratio of the one-sided (illuminated) foliage area to the soil surface it can cover. This vegetation index is important to ... ...

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LEAF AREA INDEX - WIKIPEDIA

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Leaf area index ( LAI) is a dimensionless quantity that characterizes plant canopies. It is defined as the one-sided green leaf area per unit ground surface area ( LAI = leaf area / ground area, m2 / m2) in broadleaf canopies. In conifers, three definitions for LAI have been used: Half of the total needle surface area per unit ground surface area ...

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(PDF) LEAF AREA MEASUREMENTS - RESEARCHGATE

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The litterfall method for leaf area index derivation is a semi-direct estimation that has been frequently used in the past for broadleaf stands (Bréda, 200 3: Thimonier et al.,20 10 ). … ...

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LEAF-AREA INDEX | DEFINITION OF LEAF-AREA INDEX BY MEDICAL DICTIONARY

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leaf-area index: the total area of leaves (one side) in relation to the ground area below them. ...

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LEAF AREA INDEX - HANDWIKI

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The definition “half the total leaf area per unit horizontal ground surface area” is suitable for all kinds of leaves and flat or sloping surfaces. A leaf area index (LAI) expresses the leaf area per unit ground or trunk surface area of a plant and is commonly used as an indicator of the growth rate of a plant. LAI is a complex variable ... ...

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LEAF AREA – HOW & WHY MEASURING LEAF AREA IS VITAL TO PLANT …

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Leaf area is one of the aspects measured by agricultural scientists, especially agronomists, to establish the best agricultural practices. Similarly, farmers can check if they are creating an ideal environment for their annual and perennial crops. Measuring Leaf Area There are destructive and non-destructive methods of measuring leaf area. ...

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THE LEAF AREA INDEX - SCHLEPPI

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The leaf area index (LAI) is an important parameter in plant ecology. Because it tells how much foliage there is, it is a measure of the photosynthetic active area, and at the same time of the area subjected to transpiration. It is also the area which becomes in contact with air pollutants. The LAI is further an indication of how much light is ... ...

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DEFINING LEAF AREA INDEX FOR NON-FLAT LEAVES - WILEY ONLINE LIBRARY

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Therefore, it is suggested that the leaf area index of non-flat leaves be defined as half the total intercepting area per unit ground surface area and that the definition of L based on the projected leaf area be abandoned. Volume 15, Issue 4 May 1992 Pages 421-429 Download PDF ...

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LEAF AREA INDEX - AN OVERVIEW | SCIENCEDIRECT TOPICS

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The leaf area index can be used to calculate the instantaneous crop growth rate (at any time t) which serves as a simple index of agricultural productivity. This is defined as (2.12) C = E×L= 1 P × dW dt = 1 s 1 dW dt × s 1 P and is expressed in terms … ...

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KNOW MORE ABOUT: LEAF AREA INDEX – CROPINNO | NEW

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The leaf area indicates the potential of the existing leaf area for gas exchange with the atmosphere and biosphere. Plants with more vertical leaves have more leaf area, and the higher the leaf area index, the higher the light saturation level of a plant community. ...

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GROUND‐BASED MEASUREMENTS OF LEAF AREA INDEX: A REVIEW OF …

Updated 19 years ago

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Leaf area index ( LAI) is the total one‐sided area of leaf tissue per unit ground surface area. It is a key parameter in ecophysiology, especially for scaling up the gas exchange from leaf to canopy level. It characterizes the canopy–atmosphere interface, where most of the energy fluxes exchange. ...

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ESTIMATION OF LEAF AREA INDEX AND PLANT AREA INDEX OF A ... - PLOS

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Leaf area index (LAI), defined as half the total developed area of green leaves per unit horizontal surface area [1], is one of the most important parameters characterizing plant canopy structure, processes and functions. ...

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LEAF AREA INDEX

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The leaf area index (BFI, English LAI Leaf area index ) is a key variable in the calculation of global climate scenarios (carbon dioxide output of the plant ) and the assessment of the ecological structure of, for example grasslands. However, the leaf area index also describes the influence of agricultural, forestry and natural vegetation on runoff generation. Definition The leaf area … ...

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VEGETATION INDICES: A KEY TOOL IN PRECISION AGRICULTURE - PIX4D

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A drone and Pix4Dfields can help unlock knowledge and data that was previously inaccessible at the same scale for the same price. Vegetation indices in Pix4Dfields: NDVI & NDRE. Normalized Difference Vegetation Index - In precision agriculture, NDVI is used to measure biomass. Whereas, in forestry, it is used to quantify forest supply and leaf area … ...

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* LEAF AREA INDEX (METEOROLOGY) - DEFINITION - ONLINE ENCYCLOPEDIA

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Leaf area index Leaf area index (LAI) is a dimensionless value used to specify the area of assimilation of a plant by its leaf area (m2) per ground area (m2).. leaf area index (LAI) The area of foliage per unit area of ground. Conventionally this refers to the ratio of the area of the upper side of the leaves in a canopy projected onto a flat surface to the area of the surface under the … ...

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LEAF-AREA RATIO - OXFORD REFERENCE

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The total leaf area of a plant divided by the dry mass of the entire plant. Typically measured in square centimetres per gram or square metres per kilogram, it indicates the efficiency with which a plant uses its leaves to produce plant material. It is equal to the product of the leaf mass ratio (LMR) and the specific leaf area (SLA). ...

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WIKIZERO - LEAF AREA INDEX

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The definition “half the total leaf area per unit horizontal ground surface area” is suitable for all kinds of leaves and flat or sloping surfaces. A leaf area index (LAI) expresses the leaf area per unit ground or trunk surface area of a plant and is commonly used as an indicator of the growth rate of a plant. LAI is a complex variable ... ...

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DRONE-BASED SENSING FOR LEAF AREA INDEX ESTIMATION OF CITRUS …

Updated 2 years ago

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Leaf area index (LAI) is an important crop physical parameter, which needs to be collected in order to quantify the light-use-efficiency of the vegetation [ 1 ]. The LAI is unit-less and is defined as the leaf area of half of the vegetation canopy (one-side of the leaf area) per unit ground surface area [ 2 ]. ...

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DETERMINING LEAF AREA INDEX AND LEAFY TREE ROUGHNESS USING …

Updated 12 years ago

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This is called the leaf area index (LAI) and is defined as the projected green (living) leaf area per unit surface area of the ground in broadleaf canopies [Curran and Williamson, 1987]. It is also defined as the total leaf surface area exposed to incoming light or radar energy, expressed in relation to the ground surface area beneath the plant. ...

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RAPID MAPPING OF THE LEAF AREA INDEX IN AGRICULTURAL CROPS

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The leaf area index (LAI), as the ratio of the leaf area to a given unit of land area, is an essential parameter to describe plant productivity and make management decisions. Most methods for estimating the LAI are not suitable for practical agricultural management at the field scale due to delayed availability of data, high costs, or ... ...

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GREEN LEAF AREA INDEX - ENGLISH DEFINITION, GRAMMAR, PRONUNCIATION ...

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The residential units promote community formation by providing generous common grounds or community gardens while the reduced traffic and numerous proposed trees, bioswales and green areas improve the environment’s quality, increasing leaf area index and creating new habitats, promoting biodiversity. ...

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LEAF-AREA INDEX - ENGLISH DEFINITION, GRAMMAR, PRONUNCIATION, …

Updated 3 hours ago

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The leaf area index of the grassland species was the key driver for within-canopy distribution of O3 flux. UN-2 Image annotations: The featured plot shows Leaf Area Index (LAI), a measure of global vegetative matter, from a NetCDF dataset. ...

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DEFINING LEAF AREA INDEX FOR NON‐FLAT LEAVES | SEMANTIC SCHOLAR

Updated 31 years ago

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To eliminate the confusion in the definition of leaf area index (L) for non-flat leaves, the projection coefficients of several objects including spheres, cylinders, hemicircular cylinders, and triangular and square bars are investigated through mathematical derivation and numerical calculation for a range of ellipsoidal angular distributions. It is shown that the … ...

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LIGHT INTERCEPTION AND PLANT GROWTH - CIRAD

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Leaf Area Index (LAI) is used. Land area it was measured 2above (m or cm ) Leaf area 2(m or cm ) LAI 2 2 = Example: What is the LAI when 4500 cm2 of leaf area was measured from 6 plants cut from 1 meter of row from soybeans grown in 0.5 m rows. 0.9 10000 cm 1 m x 1 m x 0.5 m 4500 cm 2 2 = LAI and Light Interception • What is the relationship between LAI and light … ...

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LEAF AREA INDEX OF BOREAL FORESTS: THEORY, TECHNIQUES, AND …

Updated 25 years ago

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Leaf area index (LAI) is a key structural characteristic of forest ecosystems because of the role of green leaves in controlling many biological and … ...

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ESTIMATION OF LEAF AREA INDEX OVER AGRICULTURAL AREAS FROM …

Updated 28 years ago

FREE From ieeexplore.ieee.org
Abstract: Leaf area index (LAI) is an important quantity governing the physical and biological processes of plant canopies. The conventional definition of LAI with respect to radiation interception is the total one-sided green leaf area per unit ground surface area. The interest in monitoring the global vegetation condition has stimulated the measurement of this … ...

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LEAF AREA INDEX - FORMULASEARCHENGINE

Updated 3 hours ago

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Leaf Area Index (LAI) is a dimensionless quantity that characterizes plant canopies.It is defined as the one-sided green leaf area per unit ground surface area (LAI = leaf area / ground area, m 2 / m 2) in broadleaf canopies.In conifers, three different definitions for LAI have been used: . Half of the total needle surface area per unit ground surface area ...

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ORNL DAAC LEAF AREA INDEX DATA (OTTER)

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12. Application of the Data Set: The leaf area index measurements are a key portion in the OTTER project goals. They give hard, physical data about the sites in the study. The combination of this field work with laboratory study and remote sensing techniques will help to simulate and predict ecosystem processes. 13. ...

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LEAF AREA INDEX DEFINITION BY BABYLON’S FREE DICTIONARY

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FREE From dictionary.babylon-software.com
Leaf area index (LAI) is a dimensionless quantity that characterizes plant canopies.It is defined as the one-sided green leaf area per unit ground surface area (LAI = leaf area / ground area, m 2 / m 2) in broadleaf canopies.In conifers, three definitions for LAI have been used: ...

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SPECIFIC LEAF AREA - WIKIPEDIA

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Rationale. Specific leaf area is a ratio indicating how much leaf area a plant builds with a given amount of leaf biomass: = where A is the area of a given leaf or all leaves of a plant, and M L is the dry mass of those leaves. Typical units are m 2.kg −1 or mm 2.mg −1.. Leaf mass per area (LMA) is its inverse and can mathematically be decomposed in two component variables, leaf … ...

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SURFACE ROUGHNESS & POROSITY | ADVANCED MODELLING PWC

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This will apply roughness on surface elements of selected entities. Figure 1: Surface roughness applied on a building in PWC analysis. In the following table, equivalent sand-grain roughness of some materials and terrain types can be seen: Material. ε, equivalent sand-grain roughness. Concrete, smooth wall. 0.0045. ...

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FRONTIERS | THE RELATIONSHIP BETWEEN LEAF AREA GROWTH AND BIOMASS ...

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Leaf area growth determines the light interception capacity of a crop and is often used as a surrogate for plant growth in high-throughput phenotyping systems. The relationship between leaf area growth and growth in terms of mass will depend on how carbon is partitioned among new leaf area, leaf mass, root mass, reproduction, and respiration. A model of leaf area growth in … ...

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LEAF AREA INDEX WIKIPEDIA THE FREE ENCYCLOPEDIA

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Effective Mode Area Calculating Effective Mode Areas. The software RP Fiber Power has a mode solver which calculates effective mode areas among various other mode properties. For simple cases, the free software RP Fiber Calculator is sufficient.. Definition: a quantitative measure of the area which a waveguide or fiber mode effectively covers ... ...
Category:  Software

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WHAT IS THE ABBREVIATION FOR LEAF AREA INDEX

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What is the abbreviation for leaf area index? Looking for the shorthand of leaf area index ? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: leaf area index . ...

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LAI - LEAF AREA INDEX

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What is the abbreviation for Leaf Area Index? What does LAI stand for? LAI abbreviation stands for Leaf Area Index. All Acronyms. Search options. Acronym Meaning; How to Abbreviate; List of Abbreviations; Popular categories. Medical; Military; Slang; Business; Technology; Clear; Suggest. LAI means Leaf Area Index. Abbreviation is mostly used in categories: Technology … ...

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WHAT IS THE ABBREVIATION FOR LEAF AREA INDEX

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Looking for the shorthand of Leaf Area Index? This page is about the various possible meanings of the acronym, ... Popularity Alphabetically Category. Term. Definition. Options. Rating. LAI: Leaf Area Index. Computing » Networking. Rate it: Couldn't find the full form or full meaning of Leaf Area Index? Maybe you were looking for one of these abbreviations: LEADHER - … ...

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Frequently Asked Questions

What is the leaf area index?

The leaf area index can be used to calculate the instantaneous crop growth rate (at any time t) which serves as a simple index of agricultural productivity. This is defined as

How does leaf area index affect photosynthesis?

Photosynthetically active radiation absorbed by the canopy declines as the leaf area index is decreased from the observed peak to the predicted optimum value. Reducing the leaf area index also decreases crop water demand by 11% under both current and elevated CO 2 concentrations.

What is the application of specific leaf area?

Application. Specific leaf area can be used to estimate the reproductive strategy of a particular plant based upon light and moisture (humidity) levels, among other factors. Specific leaf area is one of the most widely accepted key leaf characteristics used during the study of leaf traits.

What is the difference between projected leaf area and developed leaf area?

In coniferous species, projected leaf area differs from the developed one by a coefficient depending on a needle cross‐sectional area ( Grace, 1987; Barclay, 1998; Sellin, 2000 ). Leaf area is measured on a sub‐sample of leaves and related to dry mass (e.g. via specific leaf area, SLA, cm 2 g –1 ).


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