A field experiment was conducted at the research field of Horticulture Research Center at Labukhali, Patuakhali during the period from January to March 2014 (during Rabi season) to study the growth, development, yield and yield attributing of two BARI mungbean (Vigna radiate L.) varieties as influenced by five different rates of mineral nitrogen under the regional condition of Patuakhali (AEZ–13).This section for convenience of presentation has been divided into various sub–sections such as experimental site, soil, climatic condition, experimental materials, land preparation, experimental design, nutrient application, seed sowing, intercultural operations, harvesting and threshing, data collection and statistical analysis. Geographically, the research farm is located at 22037' N latitude and 89010' E longitudes. The maximum area is covered by Gangetic Tidal Floodplains and falls under Agroecological Zone “AEZ– 13”. The area lies at 0.9 to 2.1 meter above mean sea level. Soil characteristics of the experimental area are silty loams having pH value of 6.5. The study consists of two sets of treatments; the first set comprised of two BARI mungbean varieties and the second set consisted of nitrogen doses. Two BARI mungbean varieties were used for this experiment as level factor A. The seeds of both varieties were collected from the BADC, Jessore on 2 January, 2014. The two varieties of mungbean are as follows V1 : BARImung–5 V2 : BARImung–5
The experiment was undertaken to study the effects of five different levels of mineral nitrogen including control as level factor B on the growth and yield of mungbean. These five treatments were as follows Factor A: BARI Mung-5
BARI Mung-6, Factor B: Five levels of nitrogen
N0: control (without N), N30: Nitrogen at 30 kg ha–1, N45: Nitrogen at 45 kg ha–1, N60: Nitrogen at 60 kg ha–1, N75: Nitrogen at 75 kg ha–1
So, therefore the treatments combinations were as follows V1×N0: BARI mung–5 × control (Without N), V2×N0: BARI mung–6 × control (Without N) V1×N30: BARI mung–5 × Nitrogen at the rate of 30 kg ha–1, V2×N30: BARI mung–6 × Nitrogen at the rate of 30 kg ha–1, V1×N45: BARI mung–5 × Nitrogen at the rate of 45 kg ha–1, V2×N45: BARI mung–6 × Nitrogen at the rate of 45 kg ha–1, V1×N60: BARI mung–5 × Nitrogen at the rate of 60 kg ha–1, V2×N60: BARI mung–6 × Nitrogen at the rate of 60 kg ha–1, V1×N75: BARI mung–5 × Nitrogen at the rate of 75 kg ha–1, V2×N75: BARI mung–6 × Nitrogen at the rate of 75 kg ha–1
The experiment consisted of two mungbean varieties and five different rate of nitrogen and was laid out in a randomized complete block design with three replications. The seed of mungbean were sown in the research field on January 27, 2014. Seed were sown in rows by hand plough. The distances between row to row and seed to seed were 25 and 10 cm, respectively. Mature 2 seeds were placed in each point at 2–3 cm depth from the soil surface. The crop was harvested with hand on different dates based on sowing time (27–29 March, 2014) at full maturity of the crop when the colour of leaf turned yellow and dropped off. The harvested crop of each plot was bundled separately and tagged properly. The bundles were dried in sunshine for 3–4 days and brought to a clean floor. Seeds and other plant parts were separated for collecting the data. The crop sampling was done at harvest. Harvesting of the mungbean was done after 66 days of sowing. Yield data were collected after harvest. The data of following parameters were collected. From the study area we used to collect Pod length, Number of pods plant–1, Number of seed pod–1, 100–grains weight, Seed weight, Seed yield. After harvesting, the grains were removed from the separated pods and then drayed in sun for 2–3 days. Finally, grain weights were taken on individual plot basis at moisture content of 12% and then converted into t ha–1.