Asian Journal of Research in Crop Science <p style="text-align: justify;"><strong>Asian Journal of Research in Crop Science <span style="text-align: justify;">(ISSN: 2581-7167)</span></strong> aims to publish high quality papers (<a href="/index.php/AJRCS/general-guideline-for-authors">Click here for Types of paper</a>) on all aspects of Crops. This journal facilitates the research and wishes to publish papers as long as they are technically correct, scientifically motivated. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer reviewed, open access INTERNATIONAL journal.</p> en-US (Asian Journal of Research in Crop Science) (Asian Journal of Research in Crop Science) Mon, 21 Sep 2020 09:49:02 +0000 OJS 60 Synergistic Impact of Co-applied Micronized Sulfur and Nitrogen on Agronomical Traits of a Modern Spring Wheat Cultivars Grown in Alkaline Soil <p>Wheat (<em>Triticum aestivum</em> L.) uptakes only 40 to 60% of the soil available nitrogen. Sulfur deficiencies depress both nitrate uptake and nitrate reductase activity resulting in low nitrogen use efficiency. Soil and foliar supplied sulfur in combinations with foliar nitrogen were used on three of the modern and commercially grown wheat cultivars. The experiment was conducted in two consecutive growing seasons; 2017 and 2018 in a high pH soil, 8.55. Our results indicated that 714 kg ha<sup>-1</sup> of pre-planting sulfur (SS) and spraying twice with 6.66% urea and 2.2% micronized sulfur (S<sub>1</sub>FS<sub>1</sub>N<sub>1</sub>) during stages 13 &amp; 41 on Zadok`s scale, increased grain yield, total protein content, straw yield and plant height by 31.58, 26.09, 18.37 and 7.9% respectively. The results indicated a significant and positive impact sulfur-nitrogen combinations when applied on top of pre-planting applied sulfur. However, foliar sprayed sulfur had a more substantial effect on all traits, compared to the pre-planting sulfur or the foliar sprayed N, suggesting interference effect of the alkaline soil with the amount of sulfur recovered from the soil. When N and S foliar were applied simultaneously, a more substantial increase in grain yield, plant height, straw yield and total protein content was observed, suggesting a synergistic effect between these two elements. We attributed the positive effect of S<sub>1</sub>FS<sub>1</sub>N<sub>1</sub> on improving photosynthates translocation from the sources to sinks. In addition to improving nitrogen use efficiency while reducing the plant content of NO<sup>−3</sup> by optimizing the S/N ratio and reducing sulfur deficiency. Based on our results, we concluded that the foliar application of micronized S has the potential to improve the overall performance of wheat plants. Thus, we recommend enriching nitrogen and phosphate fertilizers with sulfur for alkaline soils.</p> Sabah Morsy ##submission.copyrightStatement## Mon, 21 Sep 2020 00:00:00 +0000 Effect of Ferrous Iron Stress to West Sumatera Paddy Rice (Oryza nivara) Growth on Nutrient Culture Media <p><strong>Aims: </strong>The research aimed to study the response of West Sumatera brown rice growth on nutrient culture media.</p> <p><strong>Study Design:</strong>&nbsp; Factorial design with 2 factors in completely randomized design.</p> <p><strong>Place and Duration of Study:</strong> The research was conducted in Laboratory of Tissue Culture, Laboratory of Seed Technology and Shade net house, Faculty of Agriculture, Andalas University, Padang, Indonesia from May to July 2019.</p> <p><strong>Methodology:</strong> Factorial design with 2 factors in completely randomized design was used in the research. The first factor was brown rice genotypes (Talang Babungo, Sigambiri, Pido Manggih, Labuh Baru, Balingka, Situjuah, Banuhampu, Pulen Talao, Ladang Talamao and Sikarujuik. The second factor was FeSo<sub>2 </sub>concentrations (0 ppm, 250 ppm, 500 ppm and 750 ppm). The data was analysed using F test&nbsp; 5% and continued by Duncan’s New Multiple Range Test (DNMRT) 5%.</p> <p><strong>R</strong><strong>esults:</strong> The result showed that there was interaction between brown rice genotypes and Fe concentrations to plant height and root dry weight in early growth stage. According the stress sensitivity index, Sigambiri and Ladang Talamao were the tolerant genotypes to high Fe stress and Talang Babungo and Banuhampu were moderately tolerant genotype in high concentration of Fe stress.</p> <p><strong>Conclusion: </strong>High Fe concentration affected the brown rice growth. This result can be a consideration to cultivate brown rice in high iron content land.</p> Indra Dwipa, . Yusniwati, Rahma Silvia Hirza ##submission.copyrightStatement## Tue, 22 Sep 2020 00:00:00 +0000 Combining Ability and Heterosis for Some Yield Component Traits in a 10x10 Diallel Cross of Rice (Oryza sativa L.) <p>A ten – parent diallel experiment was carried out at the Teaching and Research Farms of the Federal University of Agriculture, Makurdi, Nigeria, to estimate combining ability and heterosis in rice. The design was a 10x10 alpha lattice with three replications and data was collected on plant height (PH), tiller numbers/plant (TN), leaf length (LL) and width (LW), days to flowering (DF), panicle length (PL), panicle exsertion (PE), spikelet numbers/panicle (SN), 100 seed weight (100SW) and days to maturity(DM). A preponderance of both additive and non – additive gene action with both negative and positive GCA, SCA and % heterosis was observed in the control of yield component traits in the studied rice varieties and their hybrids. Non – additive variance was higher, except for DF, SN and DM where additive variance was higher compared to non – additivity. Six parents, namely MGD 101, FARO 44, FARO 52, FARO 57, STRASSA 58 and IR 72 recorded the highest GCA values for most of the traits and the least values in terms of days to flowering and maturity. These parents were the most frequent in crosses with the highest SCA effects and % heterosis for Tiller number, Leaf length, leaf width, panicle length and Spikelet numbers/panicle. Crosses involving these six parents also recorded the least SCA effects and % heterosis for days to flowering and maturity. Based on the results of GCA, SCA and % heterosis, backcross breeding of F<sub>1</sub>s to their respective parents (the six parents), was recommended for improvement of yield component traits.</p> T. Vange, G. O. S. Ojo, A. M. Ladan ##submission.copyrightStatement## Tue, 29 Sep 2020 00:00:00 +0000 Effects of Different Weed Control Measures on Leaf Area Index and Yield of Three Varieties of Rice under Two Planting Methods <p>Field trials were conducted during the 2005, 2006 and 2007 rainy season at Irrigation Research Station, Kadawa situated in Sudan savannah agro – ecological zone, Kano state, Nigeria to investigate the effects of different weed control measures on leaf area index and yield of three varieties of lowland rice under two planting methods. The trials were laid out in split – plot design and replicated three times with factorial combination of two planting methods and three varieties in the main plots and weed control treatments in the subplots. The result revealed that transplanting of rice increased leaf area index in 2006, 2007 and mean value for the three years 12WAS / T. Transplanting also resulted in higher paddy yield than direct seeding in 2006 and mean value for the three years. FARO 52 rice variety had significantly higher leaf area index than FARO 50 and FARO 44 in 2005 cropping season. FARO 52 had higher yield in 2006 and the mean value for the three years compare to the other two varieties. Application of pre – emergence oxadiazon at 1.0 Kg per hectare followed by post – emergence piperophos plus propanil at 1.5 Kg per hectare applied at 5 WAS / T gave the highest mean yield for the three years closely followed by hand-pulling weed control measure compared to the weedy check that gave the least mean paddy yield. Application of pre – emergence oxadiazon at 1.0 Kg per hectare followed by post – emergence piperophos plus propanil at 1.5 Kg per hectare applied at 5 WAS / T in transplanted FARO 52 gave the highest mean yield of 5.5 tonnes per hectare for the three years than&nbsp; weedy check that gave the least mean paddy yield of 2.6 tonnes per hectare. It can be concluded that transplanting of FARO 52 rice variety and combined application of pre-emergence application of oxadiazon at 1.0 kg per hectare followed by post-emergence piperophos plus propanil at 1.5 kg per hectare is therefore recommended as the economically viable integrated package for lowland rice production in the Sudan Savanna agro-ecological zones.</p> M. M. Olorukooba ##submission.copyrightStatement## Tue, 20 Oct 2020 00:00:00 +0000