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the rhizosphere would best described as
soil that is bound to roots and differs from the surrounding soil in containing many more microbes
a mineral deficiency is likely to affect older leaves more then younger leaves if
the mineral is very mobile within the plant
two groups of tomatoes were grown under laboratory conditions, one with humus added to the soil and one a control without humus. The leaves of the plants grown without humus were yellowish compared to those of the plants grown in humus-enriched soil. The best explanation for this difference is that
the humus contained minerals such as magnesium and iron, needed for the synthesis of clorophyll
the specific relationship between a legume and thats mutualistic rhizobium strain probably dpends on
specific recognition between the chemical signals and signal receptors af the thizobium strain and legume species
mycorrhizae enhance plant nutrition mainly by
absorbing water and minerals through the fungal hyphae
two plants one with mycorrhizae and one without would differ greatest in health in an environment that
in which the soil is relatively deficient in mineral nutrients
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