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The Relationship Between Combined Nitrogen Uptakes and Nitrogen Fixation in Azolla-Anabaena Symbiosis by Ito, Osamu, Watanabe, Iwao

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Aspects of the genetic and botanical status of neotropical azolla species by Zimmerman, William J., Watanabe, Iwao, Ventura, Teresita, Payawal, Pacifico, Lumpkin, Thomas A.

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Evaluation of methane oxidation in rice plant-soil system by Inubushi, Kazuyuki, Sugii, Hotaka, Watanabe, Iwao, Wassmann, Reiner

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Genetic diversity and phylogeny analysis of azolla based on dna amplification by arbitrary primers by Coppenolle, Benoit Van, Watanabe, Iwao, Hove, Charles Van, Second, Gerard, Huang, Ning, McCouch, Susan R.

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Estimation of N-2 fixation of soybean by comparison of different n-15 labeling methods by Chiu, Chih-Yu, Watanabe, Iwao, Yoshida, Tomio

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Phosphorus and Nitrogen Contents of Azolla Grown in the Philippines by Watanabe, Iwao, Ramirez, Corazon

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Sexual hybridization among azolla species by Cat, Do Van, Watanabe, Iwao, Zimmerman, W.J., Lumpkin, T.A., Baillonville, T. de Waha

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Classification of azolla spp, section azolla by Zimmerman, William J., Lumpkin, Thomas A., Watanabe, Iwao

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Isozyme differentiation of azolla lam by Zimmerman, William J., Lumpkin, Thomas A., Watanabe, Iwao

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Improvement of Phosphate Fertilizer Application to Azolla by Watanabe, Iwao, Lapis, Ma.Theresa, Oliveros, Reynaldo, Ventura, Wilbur

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Response of Azolla to P, K, and Zn in Different Wetland Rice Soils in Relation to Chemistry of Floodwater by Ali, Sikander, Watanabe, Iwao

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Dynamics of Available Nitrogen in Paddy Soils. I. Changes in Available N During Rice Cultivation and Origin of N by Watanabe, Iwao, Inubushl, Kazuyuki

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Availability to Rice Plants of Nitrogen Fixed By Azolla by Ito, Osamu, Watanabe, Iwao

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Response of Wetland Rice to Inoculation with Azospirillum lipoferum and Pseudomonas sp by Watanabe, Iwao, Lin, Chang

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The growth of four species of azolla as affected by temperature by Watanabe, Iwao, Berja, Nilda S.

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Contribution of Basal Portion of Shoot to N2 Fixation Associated with Wetland Rice by Watanabe, Iwao, Cabrera, Delfin, Barraquio, Wilfredo L.

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Differential phosphorus requirements of azolla species and strains in phosphorus-limited continuous culture by Subudhi, Budunkila Prakash Rao, Watanabe, Iwao

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Dry Season Soil Conditions and Soil Nitrogen Availability to Wet Season Wetland Rice by Ventura, Wilbur, Watanabe, Iwao

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Growth Inhibition Due to Continuous Cropping of Dryland Rice and Other Crops by Ventura, Wilbur, Watanabe, Iwao

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