 | Up a level |
Yoneyama, T and Engelaar, W M H G and Kim, H Y and Rupela, O P (2001) δ15N values of sorghum grains harvested on a Vertisol in the semi-arid tropics were positively related to doses of fertilizer N but negatively with the frequency of legume cultivation. Soil Science and Plant Nutrition, 47 (2). pp. 423-427. ISSN 0038-0768
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.
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.
Kumar Rao, J V D K and Johansen, C and Yoneyama, T and Tobita, S and Ito, O (1996) Estimation of Nitrogen Fixation by the Natural 15N-abundance Technique and Nitrogen Uptake by Pigeonpea Genotypes of Different Maturity Groups grown in an Inceptisol. Journal of Agronomy and Crop Science, 177 (2). pp. 129-138. ISSN 1439-037x
Lee, K K and Wani, S P and Yoneyama, T and Trimurtulu, N and Harikrishnan, R (1994) Associative N2-fixation in pearl millet and sorghum: levels and response to inoculation. Soil Science and Plant Nutrition, 40 (3). pp. 477-484. ISSN 0038-0768
Tobita, S and Ito, O and Matsunaga, R and Rao, T P and Rego, T J and Johansen, C and Yoneyama, T (1994) Field evaluation of nitrogen fixation and use of nitrogen fertilizer by sorghum/pigeonpea intercropping on an Alfisol in the Indian semi-arid tropics. Biology and Fertility of Soils, 17 (4). pp. 241-248. ISSN 0178-2762
Yoneyama, T and Nambiar, P T C and Lee, K K and Srinivasa Rao, B and Williams, J H (1990) Nitrogen accumulation in three legumes and two cereals with emphasis on estimation of N2 fixation in the legumes by the natural 15N-abundance technique. Biology and Fertility of Soils, 09 (01). pp. 25-30. ISSN 0178-2762
Yoneyama, T and Nambiar, P T C and Lee, K K and Srinivasa Rao, B and Williams, J H (1990) Nitrogen accumulation in three legumes and two cereals with emphasis on estimation of N2 fixation in the legumes by the natural15 N-abundance technique. Biology and Fertility of Soils, 9 (1). pp. 25-30. ISSN 0178-2762