CIFOR-ICRAF s’attaque aux défis et aux opportunités locales tout en apportant des solutions aux problèmes mondiaux concernant les forêts, les paysages, les populations et la planète.

Nous fournissons des preuves et des solutions concrètes pour transformer l’utilisation des terres et la production alimentaire : conserver et restaurer les écosystèmes, répondre aux crises mondiales du climat, de la malnutrition, de la biodiversité et de la désertification. En bref, nous améliorons la vie des populations.

CIFOR-ICRAF publie chaque année plus de 750 publications sur l’agroforesterie, les forêts et le changement climatique, la restauration des paysages, les droits, la politique forestière et bien d’autres sujets encore, et ce dans plusieurs langues. .

CIFOR-ICRAF s’attaque aux défis et aux opportunités locales tout en apportant des solutions aux problèmes mondiaux concernant les forêts, les paysages, les populations et la planète.

Nous fournissons des preuves et des solutions concrètes pour transformer l’utilisation des terres et la production alimentaire : conserver et restaurer les écosystèmes, répondre aux crises mondiales du climat, de la malnutrition, de la biodiversité et de la désertification. En bref, nous améliorons la vie des populations.

CIFOR–ICRAF publishes over 750 publications every year on agroforestry, forests and climate change, landscape restoration, rights, forest policy and much more – in multiple languages.

CIFOR–ICRAF addresses local challenges and opportunities while providing solutions to global problems for forests, landscapes, people and the planet.

We deliver actionable evidence and solutions to transform how land is used and how food is produced: conserving and restoring ecosystems, responding to the global climate, malnutrition, biodiversity and desertification crises. In short, improving people’s lives.

Sampling strategies, scaling, and statistics

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Many experiments aim to understand how some aspect of the aerial and soil environment of a plant influences its growth. Considerable biomass is often allocated to the root system, and it is the roots that absorb most nutrients and water (Russell 1977). The property of the root system which is most appropriate to measure depends on the objective of the experiment. Root length should be measured to calculate the inflow rate of water and nutrients (see Chaps. 6, 13, 14). Root dry mass indicates the carbon allocation to the root system. Branching patterns and the number and lengths of each class of root, together with the distribution of root diameters gives a more complete picture of root architecture, but requires a large investment of labour. Detailed information on root architecture may be of interest in constructing mathematical models of root growth (see Chap. 4), in comparing the structure and function of root systems of different species or genotypes (e.g. Fitter and Stickland 1991), and in evaluating root responses to environmental conditions (e.g. Robinson 1994).

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