The experiment was conducted under plastic tunnel at Groundnut Research Station, Attock, Pakistan during 2006-2007 to 2008-2009 to determine water consumption by three off-season vegetables irrigated through drip and furrow systems, and to evaluate the comparative water use efficiency (WUE) of two irrigation systems in rain fed areas. Drip and furrow irrigation systems were tested on tomato, cucumber and bell pepper in this study. A permanent tunnel of 24 x 8 x 3 m was erected. Each crop was planted on 6 x 8 m under drip irrigation and on 6 x 2.70 m under furrow irrigation system. Water use efficiency was calculated as the ratio of total yield (kg) to total water consumed by the crop (m3). Each crop consumed less water under drip irrigation as compared to furrow irrigation system. Amomg crops, cucumber comsumed the least amount of water irrespective of irrigation systems. Average water use efficiency increased by 250% for tomato, 274% for cucumber and 245% for bell pepper under drip irrigation system as compared to furrow system. On the contrary, the average fruit yield increased only by 2.05% for tomato, 3.32% for cucumber and 2.35% for bell pepper in furrow irrigation over drip irrigation. This suggested that drip irrigation has a greater scope for production of off-season vegetables especially in water scarce areas of Pakistan. DOI: http://dx.doi.org/10.3329/sja.v12i1.21113 SAARC J. Agri., 12(1): 62-71 (2014)
Good Health and Well-being is one of the important goals in the current decade of twenty first century. The people of current generation prefer the consumption of plant sourced bioactive molecules over the modern medicines because the former has no side effects and residue free. In order to mitigate the food requirement of growing global population during the previous century, the green revolution technologies focused on fewer crops leading to negligence of several important crops; popularly known as underutilized or neglected crops. In the list of underutilized crops, Dioscorea spp. occupies significant niche as it is rich in several phytochemicals and could be grown under multiple stress conditions faced by the modern agricultural practices. Besides, it has been known as prominent member under age old practices of “traditional health care system” to treat several malaises of human being during the early date of civilization. The tubers and bulbils of the Dioscorea spp. are rich in saponins, tannin, flavonoids, sterols, polyphenols, and glycosides in addition to its higher contents of basic essential nutrients such as protein, carbohydrates, vitamins, minerals etc. Further, its tubers are staple food for indigenous people of several Asian and African countries. Therefore, the Dioscorea spp. signifies as an important crop both to the next generation population as well as underprivileged class of people in the coming decade for good health wellbeing and food security. SAARC J. Agri., 17(2): 1-13 (2019)
An experiment was carried out at Horticulture Farm of Bangladesh Agricultural University, Mymensingh during the period from October 2018 to March 2019 to examine the effects of different bulb size viz., large size bulb (15±1 g), medium size bulb (10±1 g), small size bulb (7±1 g) on seed production of two onion varieties (Taherpuri and Kalash Nagari). Significant variation observed in both varieties for most of the parameters based on onion bulb size. The variety Kalash Nagari showed better performances compared to variety Taherpuri. After 60 days of planting, Kalash Nagari variety gave the highest plant height (55.07 cm), number of leaves (20.62), stalk length (100.78 cm), and total seed yield (630 kg ha-1), while in Taherpuri plant height, leaf number, stalk length and total seed weight were 32.21 cm, 6.93, 61.47 cm and 270 kg ha-1, respectively. Large sized bulb gave better performance compared to small sized bulb. The large sized bulb gave highest plant height (49.83 cm) and highest total seed yield (490 kg ha-1). Medium size bulb gave the seed yield (460 kg ha-1) and lowest in small size bulb (390 kg ha-1). Seed yield was significantly affected by the combined effects of variety and bulb size. Kalash Nagari onion with large sized bulb gave the highest seed yield (660 kg ha-1) and Taherpuri variety with small sized bulb gave the lowest seed yield (180 kg ha-1). SAARC J. Agri., 18(2): 51-65 (2020)
Salinity causes cellular damage, limiting crop productivity. Accumulation of proline is one of the main adaptive mechanisms to salinity in plants. The main objective of this study was to mitigate the adverse effects of soil salinity in boro rice by exogenous application of proline. The field experiment was conducted at the farmer’s field of Botiaghata, Khulna with Boro rice. The soil was silty clay loam having pH 7.2, EC 6.6 dS/m, CEC 26 meq/100 g soil and organic matter content 0.84%. Two rice varieties (salt-sensitive; BRRI dhan29 and salt-tolerant; BINA dhan-8) were used as test crops. There were ten treatment combinations with different concentrations of proline applied at seedling and/or vegetative stages. Recommended doses of N, P, K, S and Zn fertilizers were applied to the all experimental plots. The experiments were laid out in a randomized complete block design with three replications. Soil salinity caused a significant reduction in growth and yield of both salt-sensitive and salt-tolerant rice. Salt-tolerant rice produced higher grain and straw yields than salt-sensitive rice. Application of proline significantly increased growth, and grain and straw yields of boro rice under saline condition. There were no considerable variations in growth and yield of rice due to the different doses of proline. Increased nutrient uptake and K+/Na+ ratio in boro rice were observed due to proline application. The present study suggests that exogenous proline improves salt tolerance in rice by increasing K+/Na+ ratio and nutrient uptake. Progressive Agriculture 29 (4): 295-303, 2018
An experiment was conducted to evaluate the growth of Chlorella ellipsoidea in three different media viz,. medium I (pulse bran), medium II (soil extract) and medium III (inorganic) under the natural environmental conditions. The alga, C. ellipsoidea, reached maximum cell density of 56.32 × 10 6 cells ml -1 in 10 days in medium I (pulse bran), maximum cell density of 102.99 × 10 6 cells ml -1 in 11 days in medium II (soil extract) and maximum cell density of 64.23 × 10 6 cells ml -1 in 12 days in medium III (inorganic medium). The ranges of water temperature, air temperature and light intensity were 22 to 32ºC, 22 to 34ºC and 2.11 to 4.31 (× 10 3 ) lux, respectively during the culture period. The average sunshine period was 7.65 ± 1.57 hours. Total alkalinity, free CO2, pH, NO3-N, PO4-P of algal culture medium I, medium II and medium III were 220, 200 and 150 mg L -1 ; 26, 9 and 19 mg L -1 ; 7.9, 7.6 and 7.5; 45, 45 and 133.33 mg L -1 ; 10.9, 15.1 and 37.06 mg L -1 , respectively. Cell densities of cultures of C. ellipsoidea under three treatments I, II and III, it can be concluded that cell densities under 3 treatments are significantly different (F=39.78) and treatment II (soil extract medium) is the best for algal (C. ellipsoidea) culture among three treatments.
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