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Ainhoa Martínez-Medina, Antonio Roldán, and Jose A. Pascual

contrast with a previous report in which inoculation of a solid formulation of Trichoderma atroviride C52 decreased the Trichoderma population in the rhizosphere ( McLean et al., 2005 ). Fig. 1. T. harzianum and F. oxysporum population. ( A

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Valérie Gravel, Claudine Ménard, and Martine Dorais

compatible with the inoculation of beneficial rhizosphere microorganisms such as biological control agents or plant growth-promoting microorganisms and would likely lead to an improved repressive effect ( Avis et al., 2008 ). The objectives of this study were

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Victor M. Gallegos-Cedillo, Juan E. Álvaro, Th. Capatos, T. Luan Hachmann, Gilda Carrasco, and Miguel Urrestarazu

rhizosphere. In addition, there is no information on the potential benefits of Si in blueberry cultivation. Therefore, the objectives of this work were to evaluate the effect of the use of Si in the nutrient solution and to compare citric acid, as a source of

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Ka Yeon Jeong, Paul V. Nelson, Carl E. Niedziela Jr., and David A. Dickey

. When fertilizers supply ammonium, rhizosphere biotic acidification can occur during microbial nitrification of ammonium to nitrate, where two protons are generated for each ammonium ion oxidized. Plant and microbe uptake of ions supplied by fertilizers

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Jared Barnes, Paul Nelson, Brian E. Whipker, David A. Dickey, Dean Hesterberg, and Wei Shi

Substrate pH, the activity of free protons (H + ) in aqueous solution, has been of concern to horticulturists for years because it has a pronounced effect on nutrient availability ( Sparks, 2003 ), and it gives insight into plant rhizosphere

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Dennis N. Katuuramu, W. Patrick Wechter, Marcellus L. Washington, Matthew Horry, Matthew A. Cutulle, Robert L. Jarret, and Amnon Levi

exudates from secondary roots into the rhizosphere play an important role nutrient acquisition, combating invasive weed species through allelopathy and attraction of beneficial microbes within the root zone that inhibit soilborne pathogens like Fusarium

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Lina Fu, Lijun Chai, Dekuan Ding, Zhiyong Pan, and Shu’ang Peng

solubilized by H + -ATPase-driven ( HA gene family) excretion of protons in the rhizosphere of roots ( Dell’Orto et al., 2000 ); it is then reduced by ferric chelate reductase encoded by the FRO gene family in the apoplast ( Robinson et al., 1999 ), and

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Craig M. Hardner, Marisa Wall, and Alyssa Cho

important for rhizosphere management. Integrated nutrient management of macadamia should consider the specific root biology of macadamia. For sustainable macadamia industry in the future, it is imperative to develop appropriate nutrient management by

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Takafumi Kinoshita and Masaharu Masuda

exudates does not reflect the total amount of P present in the rhizosphere ( Noguchi et al., 2005 ; Tachibana and Suzuki, 1980 ). On the other hand, Terabayashi et al., (1991a , 1991b ) reported that the ratio of uptake during the night to the 24-h

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Cinta Calvet, Amelia Camprubi, Ana Pérez-Hernández, and Paulo Emilio Lovato

. Individual spores were extracted from the soil rhizosphere of a 6-month-old leek plant culture by wet sieving (250-, 125-, and 50-μm mesh) and decanting ( Gerdemann and Nicolson, 1963 ) and also from the root-free compartments of four petri plates with 6