When researchers are measuring plant productivity, they usua

When researchers are measuring plant productivity, they usually harvest and measure above-ground bio… Show more When researchers are measuring plant productivity, they usually harvest and measure above-ground biomass. But with grassland plants, it is common to find that most of an individual’s biomass is in its root system. Why don’t researchers measure below-ground biomass as well? Root form is too variable among species–ranging from deep taproots to shallow networks of fine roots. It’s traditional to measure above-ground biomass; in addition, researchers can be a little lazy sometimes. Above-ground biomass is a better indicator of productivity (NPP). It’s very difficult to measure accurately (roots break, are grafted or entwined with other individuals, or adhere to soil). • Show less

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