Plant stature of aromatic rice genotypes in the environment of Bangladesh.

Plant stature of a rice crop is an important selection criterion. As plant height is a quantitative trait it is influenced by environmental conditions. A field experiment was conducted with 40 rice genotypes to assess the fluctuation and stability of plant height in a series of 16 environmental situations. The effects of genotype (G), environment (E) and all the components of G×E interaction were highly significant. Among the genotypes, Jamai sohagi was extremely sensitive (bi = 1.37) to environmental changes, and indicating lowest adaptability over the environments. Plant height of seven genotypes viz. Basmati PNR346, Benaful, BRRIdhan28, BRRIdhan38, BRRIdhan39, Gandho kasturi and Neimat, having the bi values between 0.59 and 0.72, showed high stability against environmental changes. The other seven genotypes viz. Badshabhog, Basmati Tapl-90, Kamini soru, Khazar, Laljira, Sarwati and Ukni madhu expressed only nonlinear sensitivity (S2 di = 90 – 181)) and thus unpredictable fluctuation. Twenty one genotypes indicated their average stability (bi = 0.91 -1.15) over the environments.

Effect of plastic mulch on growth and yield of chilli (Capsicum annuum L.)

In this work a field study was conducted to evaluate the effect of coloured plastic mulch on growth and yield of chilli from October 2005 to April 2006. The plastic mulches were transparent, blue, and black and bare soil was the control. Different mulches generated higher soil temperature and soil moisture under mulch over the control. Transparent and blue plastic mulches encouraged weed population which were suppressed under black plastic. Plant height, number of primary branches, stem base diameter, number of leaves and yield were better for the plants on plastic. At the mature green stage, fruits had the highest vitamin-C content on the black plastic. Mulching produced the fruits with the highest chlorophyll-a, chlorophyll-b and total chlorophyll contents and also increased the number of fruits per plant and yield. However, mulching did not affect the length and diameter of the fruits and number of seeds per fruit. Plants on black plastic mulch had the maximum number of fruits and highest yield. Thus, mulching appears to be a viable tool to increase the chilli production under tropical conditions.

Style of lecturing of medical teacher--an evaluation by medical students of Mymensingh Medical College.

It was a cross sectional descriptive type of study carried out among the 3rd year, 4th year and 5th year medical students of Mymensingh Medical College (MMC) with the objective of finding out the various lecture style followed by medical teachers of MMC and other relevant information regarding teaching tools used related to lecturing. The sample size was 134 who were selected purposively. The study was conducted in the month of June 2004. One thirty four (134) respondents were interviewed by pre tested questionnaire. From the study it was revealed that majority (66%) of these respondents were male and 34% were female and 57%, 28.5% and 14.5% were 3rd, 4th and 5th year students respectively. A good number of students (82.5%) expressed their opinion that lecture time was sufficient for their learning. Among the medical teachers the lecture methods followed were VIG (81%) OP (54%) EP (47.2%) EL (25.5%) AT (23%). Eighty Seven percent of the students gave their opinion that the best style of lecture was EP. Seventy and half percent students disliked the AT style followed by OP, which was 85.5%. Seventy two percent of the students were not satisfied with the teaching aids used by the teachers. OHP (90%) was the most commonly used teaching material. Most of the respondents (97.5%) expressed their opinion that SGT was the most suitable way for imparting information.