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Katayama, K and Ito, O and Matsunaga, R and Adu-Gyamfi, J J and Rao, T P and Anders, M M and Lee, K K (1995) Nitrogen balance and root behavior in four pigeonpea-based intercropping systems. Fertilizer Research, 42 (1-3). pp. 315-319.
Fujita, K and Kai, Y and Takayanagi, M and El-Shemy, H and Adu-Gyamfi, J J and Mohapatra, P K (2004) Genotypic variability of pigeonpea in distribution of photosynthetic carbon at low phosphorus level. Plant Science, 166 (3). pp. 641-649.
Fujita, K and Okada, M and Lei, K and Ito, J and Ohkura, K and Adu-Gyamfi, J J and Mohapatra, P K (2003) Effect of P-deficiency on photoassimilate partitioning and rhythmic changes in fruit and stem diameter of tomato (Lycopersicon esculentum) during fruit growth. Journal of Experimental Botany, 54 (392). pp. 2519-2528.
Nobuyasu, H and Liu, S and Adu-Gyamfi, J J and Mohapatra, P K and Fujita, K (2003) Variation in the export of 13C and 15N from soybean leaf: the effects of nitrogen application and sink removal. Plant and Soil, 253 (2). pp. 331-339.
Katayama, K and Ito, O and Adu-Gyamfi, J J and Rao, T P (2000) Analysis of Relationship between Root Length Density and Water Uptake by Roots of Five Crops Using Minirhizotron in the Semi-Arid Tropics. JARQ - Japan Agricultural Research Quarterly, 34 (2). pp. 81-86. ISSN 0021-3551
Katayama, K and Ito, O and Adu-Gyamfi, J J and Rao, T P and Dacanay, E V and Yoneyama, T (1999) Effects of NPK fertilizer combinations on yield and nitrogen balance in sorghum or pigeonpea on a vertisol in the Semi-Arid Tropics. Soil Science and Plant Nutrition, 45 (1). pp. 143-150. ISSN 0038-0768
Adu-Gyamfi, J J (1999) Food Security in Nutrient-Stressed Environments: Exploiting Plants' Genetic Capabilities, Summary and Recommendations of an International Workshop 27-30 Sep 1999. Manual. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India.
Adu-Gyamfi, J J and Ito, O (1997) Nitrogen Management in Sorghum/Pigeonpea Intercrop. In: Extending nitrogen fixation research to farmers' fields: proceedings of an International Workshop on Managing Legume Nitrogen Fixation in the Cropping Systems of Asia, 20-24 Aug 1996, ICRISAT Asia Center, Patancheru, Andhra Pradesh, India.
Adu-Gyamfi, J J and Ito, O and Yoneyama, T and Katayama, K (1997) Nitrogen management and biological nitrogen fixation in sorghum / pigeonpea intercropping on Alfisols of the semi-arid tropics. Soil Science and Plant Nutrition, 43. pp. 1061-1066.
Adu-Gyamfi, J J and Ito, O and Yoneyama, T and Devi, G and Katayama, K (1997) Timing of N fertilization on N2 fixation, N recovery and soil profile nitrate dynamics on sorghum/pigeonpea intercrops on Alfisols on the semi-arid tropics. Nutrient Cycling in Agroecosystems, 48 (3). pp. 197-208.
Adu-Gyamfi, J J and Katayama, K and Devi, G and Rao, T P and Ito, O (1996) Estimation of Soil Nitrogen Status in Intercropping Through Soil Solution. In: Proceedings of the International Workshop: Dynamics of Roots and Nitrogen in Cropping Systems of the Semi-Arid Tropics, 21-25 November 1994, ICRISAT Patancheru, Andhra Pradesh, India.
Adu-Gyamfi, J J and Katayama, K and Devi, G and Rao, T P and Ito, O (1996) Improvement of Soil and Fertilizer Nitrogen Use Efficiency in Sorghum/Pigeonpea Intercropping. In: Proceedings of the International Workshop: Dynamics of Roots and Nitrogen in Cropping Systems of the Semi-Arid Tropics, 21-25 November 1994, ICRISAT Patancheru, Andhra Pradesh, India.
Devi, G and Rao, T P and Adu-Gyamfi, J J and Katayama, K and Ito, O (1996) Simulation of Rooting Profile Using Soil Properties, Crop Characteristics, and Climatic Data. Series on International Agricultural Research, 3. pp. 573-584. ISSN 1341-3899
Fujita, K and Kai, Y and Takayanagi, M and El-Shemy, H and Adu-Gyamfi, J J and Mohapatra, P K (2004) Genotypic variability of pigeonpea in distribution of photosynthetic carbon at low phosphorus level. Plant Science, 166 (3). pp. 641-649.
Fujita, K and Okada, M and Lei, K and Ito, J and Ohkura, K and Adu-Gyamfi, J J and Mohapatra, P K (2003) Effect of P-deficiency on photoassimilate partitioning and rhythmic changes in fruit and stem diameter of tomato (Lycopersicon esculentum) during fruit growth. Journal of Experimental Botany, 54 (392). pp. 2519-2528.
Nobuyasu, H and Liu, S and Adu-Gyamfi, J J and Mohapatra, P K and Fujita, K (2003) Variation in the export of 13C and 15N from soybean leaf: the effects of nitrogen application and sink removal. Plant and Soil, 253 (2). pp. 331-339.
Ishikawa, S and Adu-Gyamfi, J J and Nakamura, T and Yoshihara, T and Watanabe, T and Wagatsuma, T (2002) Genotypic variability in phosphorus solubilizing activity of root exudates by pigeonpea grown in low-nutrient environments. Plant and Soil, 245 (1). pp. 71-81.
Yamamoto, A and Nakamura, T and Adu-Gyamfi, J J and Saigusa, M (2002) Relationship between chlorophyll content in leaves of sorghum and pigeonpea determined by extraction method and by chlorophyll meter (SPAD-502). Journal of Plant Nutrition, 25 (10). pp. 2295-2301.
Nakamura, T and Adu-Gyamfi, J J and Yamamoto, A and Ishikawa, S and Nakano, H and Ito, O (2002) Varietal differences in root growth as related to nitrogen uptake by sorghum plants in low-nitrogen environment. Plant and Soil, 245 (1). pp. 17-24.
Katayama, K and Ito, O and Adu-Gyamfi, J J and Rao, T P (2000) Analysis of Relationship between Root Length Density and Water Uptake by Roots of Five Crops Using Minirhizotron in the Semi-Arid Tropics. JARQ - Japan Agricultural Research Quarterly, 34 (2). pp. 81-86. ISSN 0021-3551
Katayama, K and Ito, O and Adu-Gyamfi, J J and Rao, T P and Dacanay, E V and Yoneyama, T (1999) Effects of NPK fertilizer combinations on yield and nitrogen balance in sorghum or pigeonpea on a vertisol in the Semi-Arid Tropics. Soil Science and Plant Nutrition, 45 (1). pp. 143-150. ISSN 0038-0768
Adu-Gyamfi, J J (1999) Food Security in Nutrient-Stressed Environments: Exploiting Plants' Genetic Capabilities, Summary and Recommendations of an International Workshop 27-30 Sep 1999. Manual. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India.
Adu-Gyamfi, J J and Ito, O (1997) Nitrogen Management in Sorghum/Pigeonpea Intercrop. In: Extending nitrogen fixation research to farmers' fields: proceedings of an International Workshop on Managing Legume Nitrogen Fixation in the Cropping Systems of Asia, 20-24 Aug 1996, ICRISAT Asia Center, Patancheru, Andhra Pradesh, India.
Adu-Gyamfi, J J and Ito, O and Yoneyama, T and Katayama, K (1997) Nitrogen management and biological nitrogen fixation in sorghum / pigeonpea intercropping on Alfisols of the semi-arid tropics. Soil Science and Plant Nutrition, 43. pp. 1061-1066.
Adu-Gyamfi, J J and Ito, O and Yoneyama, T and Devi, G and Katayama, K (1997) Timing of N fertilization on N2 fixation, N recovery and soil profile nitrate dynamics on sorghum/pigeonpea intercrops on Alfisols on the semi-arid tropics. Nutrient Cycling in Agroecosystems, 48 (3). pp. 197-208.
Adu-Gyamfi, J J and Katayama, K and Devi, G and Rao, T P and Ito, O (1996) Estimation of Soil Nitrogen Status in Intercropping Through Soil Solution. In: Proceedings of the International Workshop: Dynamics of Roots and Nitrogen in Cropping Systems of the Semi-Arid Tropics, 21-25 November 1994, ICRISAT Patancheru, Andhra Pradesh, India.
Adu-Gyamfi, J J and Katayama, K and Devi, G and Rao, T P and Ito, O (1996) Improvement of Soil and Fertilizer Nitrogen Use Efficiency in Sorghum/Pigeonpea Intercropping. In: Proceedings of the International Workshop: Dynamics of Roots and Nitrogen in Cropping Systems of the Semi-Arid Tropics, 21-25 November 1994, ICRISAT Patancheru, Andhra Pradesh, India.
Devi, G and Rao, T P and Adu-Gyamfi, J J and Katayama, K and Ito, O (1996) Simulation of Rooting Profile Using Soil Properties, Crop Characteristics, and Climatic Data. Series on International Agricultural Research, 3. pp. 573-584. ISSN 1341-3899
Fujita, K and Kai, Y and Takayanagi, M and El-Shemy, H and Adu-Gyamfi, J J and Mohapatra, P K (2004) Genotypic variability of pigeonpea in distribution of photosynthetic carbon at low phosphorus level. Plant Science, 166 (3). pp. 641-649.
Fujita, K and Okada, M and Lei, K and Ito, J and Ohkura, K and Adu-Gyamfi, J J and Mohapatra, P K (2003) Effect of P-deficiency on photoassimilate partitioning and rhythmic changes in fruit and stem diameter of tomato (Lycopersicon esculentum) during fruit growth. Journal of Experimental Botany, 54 (392). pp. 2519-2528.
Nobuyasu, H and Liu, S and Adu-Gyamfi, J J and Mohapatra, P K and Fujita, K (2003) Variation in the export of 13C and 15N from soybean leaf: the effects of nitrogen application and sink removal. Plant and Soil, 253 (2). pp. 331-339.
Ishikawa, S and Adu-Gyamfi, J J and Nakamura, T and Yoshihara, T and Watanabe, T and Wagatsuma, T (2002) Genotypic variability in phosphorus solubilizing activity of root exudates by pigeonpea grown in low-nutrient environments. Plant and Soil, 245 (1). pp. 71-81.
Nakamura, T and Adu-Gyamfi, J J and Yamamoto, A and Ishikawa, S and Nakano, H and Ito, O (2002) Varietal differences in root growth as related to nitrogen uptake by sorghum plants in low-nitrogen environment. Plant and Soil, 245 (1). pp. 17-24.
Katayama, K and Ito, O and Adu-Gyamfi, J J and Rao, T P (2000) Analysis of Relationship between Root Length Density and Water Uptake by Roots of Five Crops Using Minirhizotron in the Semi-Arid Tropics. JARQ - Japan Agricultural Research Quarterly, 34 (2). pp. 81-86. ISSN 0021-3551
Katayama, K and Ito, O and Adu-Gyamfi, J J and Rao, T P and Dacanay, E V and Yoneyama, T (1999) Effects of NPK fertilizer combinations on yield and nitrogen balance in sorghum or pigeonpea on a vertisol in the Semi-Arid Tropics. Soil Science and Plant Nutrition, 45 (1). pp. 143-150. ISSN 0038-0768
Adu-Gyamfi, J J and Ito, O and Yoneyama, T and Katayama, K (1997) Nitrogen management and biological nitrogen fixation in sorghum / pigeonpea intercropping on Alfisols of the semi-arid tropics. Soil Science and Plant Nutrition, 43. pp. 1061-1066.