No abstract

Original Research Article -1 ) was recorded in Kalizira variety with control. The overall results indicated that recommended dose of all chemical fertilizers optimized the yield of aromatic rice.

The study was conducted to evaluate the vermicompost enhances the yield and quality of red amaranth subjected to acidic soil. Five treatments namely, control (T1), cowdung (T2), compost (T3), vermicompost (T4) and lime+100% recommended inorganic fertilizer dose (T5) were considered in acidic soil for the fulfilment of experimental objectives. The experiment was laid out in a randomized complete block design with three replications in the southern part of Bangladesh. All the treatments gave significantly higher yield (p<0.05) while it was compared to the control.  Highest yield of red amaranth was observed from the treatment of vermicompost (7.79 tha-1) followed by lime (5.79 tha-1), compost (5.52 tha-1) and cowdung (4.73 tha-1). The result showed that the effects of vermicompost were more efficient in terms of vigorous production, nutrient contents as well as in the maintenance of soil pH for the potential cultivation of red amaranth compared to the other management. Besides these, the nutrients content of red amaranth was also observed and found that the Ca, Mg, K, P, S and Fe were substantially higher in vermicompost except the Zn and B. Mg, K and P content were highly (r2=>0.9) correlated with the yield. Only vermicompost and lime enhanced 7% and 0.3% of pH over the control. Therefore, in acidic soil the vermicompost would be the best alternative for Red amaranth production.

Nitrogen (N) is one of the most important nutrients for rice cultivation and probably the hardest to maintain in soil. This experiment was conducted to investigate the impacts of different N forms and doses as urea on BRRI dhan29 during boro season in Meherpur district, Bangladesh. The two most abundant forms of urea namely granular urea (GU) and urea super granule (USG) were selected with five doses (0, 100, 150, 200, and 250 kg ha -1 ) for each form. The treatments were replicated thrice in Randomized Complete Block Design (RCBD). GU was broadcasted and USG was applied using deep placement method. Other fertilizers viz. triple super phosphate, muriate of potash, gypsum, and zinc sulfate were applied at 100, 70, 60, and 5 kg ha -1 , respectively. Agronomic parameters were measured by randomly selecting five hills from each plot. Application of N through USG significantly improved almost all agronomic characteristics such as plant height, total and effective tiller hill -1 , panicle length, total and filled grains panicle -1 , straw and biological yields, grain yield, and harvest index. BRRI dhan29 produced the highest grain and straw yields with the highest dose of USG application (250 kg ha -1 ). The 1000-seed weight was not significantly affected by N doses or by forms that might be due to its genetically controlled trait and environmental influence during the grain filling stage. Deep placement of USG ensured adequate N supply for a longer period that resulted in enhancement of growth and yield components of BRRI dhan29.

A pot experiment was conducted at the experimental net house of the Department of Soil Science, Sylhet Agricultural University, Sylhet, Bangladesh to observe the effect of fertilizers on yield and nutrient uptake of local aromatic rice varieties during the Aman season of 2015. The experiment was laid out in a Randomized Complete Block Design with three replications. Five local aromatic rice varieties (Kalizira: V1, Muktasail: V2, Nagrasail: V3, Maloti: V4 and Chinigura: V5) and four packages of fertilizers (F1:  Recommended package i.e. 45-10-20-10-0.5 kg ha-1 of N-P-K-S-Zn, F2: 2/3rd of recommended package, F3: 1/3rd of recommended package, and F4: Control) were used. Urea, TSP, MoP, gypsum and ZnSO4 were used as N, P, K, S and Zn source, respectively. According to the treatment, all fertilizers were applied as basal during final pot preparation while urea was applied in two equal splits (one half as basal and another half at 40 DAT). Nutrient content and uptake of the aromatic rice varieties were significantly affected by the application of different fertilizer packages (with few exceptions). Mostly Kalizira (1.10-0.44-2.31-0.67-13.75 g pot-1 of N-P-K-S-Zn) and/or Nagrasail (1.15-0.46-2.70-0.62-11.74 g pot-1 of N-P-K-S-Zn) varieties showed the highest nutrient uptake in grain and straw with recommended package of fertilizers. While in maximum cases Chinigura (0.41-0.16-0.76-0.197-3.17 g pot-1 of N-P-K-S-Zn) was observed to have the lowest with control treatment. In case of post harvest soil nutrient analyses, Kalizira and/or Chinigura variety associated with recommended package of fertilizers showed the highest nutrient status.