A study was conducted in Horticulture farm of Agriculture and Forestry University, Rampur, Chitwan, Nepal, during November 2015 to February 2016 by using three commercial radish varieties (All Season White, Mino Early Long White and Pyuthane Red) and five nutrient sources combination of organic manure (Poultry and Farm yard manure) and recommended dose of inorganic fertilizer (100:80:40 NPK kg ha -1 ) replicated three times in a factorial RCBD design. Most of the plant growth and yield parameters were found superior in treatments consisting poultry manure (PM) alone and in combinations with inorganic fertilizer. Treatment consisting farm yard manure (FYM) was found inferior in most of the cases. At the time of harvest, significantly higher plant height (37.5 cm), number of leaves per plant (24.77), root diameter (39.01 mm), average leaf length (35.03 cm), average leaf width (12.86 cm) was observed in treatment consisting PM (50%) and RDF (50%). Similarly, root yield (73.98 t ha -1 ) and shoot yield (62.52 t ha -1 ) was also found higher in the same treatment. Among the three commercial radish varieties, Mino Early Long White was found superior in most of the growth and yield parameters viz., number of leaves per plant, biological yield, root yield, root length, root diameter, marketable root, smooth root and excellent fleshed root percentage.

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Field experiments were conducted in 1995/96 and 1996/97 to investigate the effect of early blight epidemics on photosynthetically active radiation (PAR) interception (RI), radiation use efficiency (RUE), and total dry matter (TDM) production of potatoes (Solanum tuberosum) grown in Canterbury, New Zealand. RI was calculated from green leaf area index (GLAI) corrected for disease. RUE was calculated as the ratio between accumulated TDM and accumulated RI. Early blight reduced RI by 9% in both seasons and RUE by 17% and 28% in 1995/96 and 1996/97 respectively. There was a total loss of 26% and 36% in TDM in 1995/96 and 1996/97 respectively. Nitrogen inputs increased RUE by 3% and 16% as compared to low nitrogen status in 1995/ 96 and 1996/97 respectively. Results showed thatRI † Deceased. H03116;

Four experiments were conducted over two growing seasons during 1995/96 and 1996/97 at Lincoln University and New Zealand Institute for Crop & Food Research, Lincoln, Canterbury, to assess whether radiation interception (RI) alone is a good predictor of potato (Solanum tuberosum) total dry matter (TDM) grown under different environments. In the two field experiments production environments were altered by different rates of nitrogen application and in bag experiments, the different production environments were created with the presence of different amounts of potato cyst nematode (Globodera rostochiensis) per ml of soil. The different production environments significantly affected leaf area index (LAI), RI, radiation use efficiency (RUE), and TDM. Increased soil fertility † Deceased. H03030; Online publication date 17 March 2004 Received 24 March 2003; accepted 17 October 2003significantly increased RI, RUE, and TDM where as the presence of potato cyst nematode significantly decreased RI, RUE, and TDM. There was a strong (P < 0.001) positive linear relationship between RUE and applied nitrogen, whereas there was a linear, negative relationship between RUE and the numbers of potato cyst nematode per ml of soil. On the basis of this study it was concluded that under different production environments both RI and RUE must be known to accurately predict the TDM of potatoes.