Effect of seeding dates on three wheat varieties in the middle irrigated region of Iraq. II. Yield components, grain yield, protein percentage and yield
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In a field experiment at Faisalabad, Pakistan conducted during winter 2005-06, the effect of three sowing dates December 1, 15 and 30 on three wheat cultivars Inqlab-91, AS-2002 and Bhakkar-2002 was studied. Sowing dates and varieties both significantly affected the number of fertile tillers m, plant height, number of spikelets per spike, 1000-grain weight and grain yield. In case of sowing dates significantly maximum grain yield (4289.54 kg ha) was obtained when crop was sown on 1 December against the minimum grain yield (2109.50 kg ha ) in case of late sowing i.e. 30 December. Among of varieties Inqlab-91 gave significantly maximum yield (3550.44 kg ha) while minimum yield (2932.59 kg ha) was obtained by AS-2002.
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An experiment was conducted during Rabi seasons of 2015-16 and 2016-17 to study the effect of five dates of sowing (20th October,5th November, 20th November, 5th and 20th December) on growth, yield attributes and yield of four wheat varieties (VL-829,VL-907,VL-892 and HS-490) on a silty clay loam soil at Palampur (HP), India. Wheat sown on 20th November recorded significantly highest plant height, tillers/m2, Dry matter accumulation, grains/spike, grain and straw yield. Among varieties, VL-907 recorded significantly highest grains/spike, grain and straw yield and hence recorded significantly highest grain yield.
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A field experiment was carried out during three consecutive years: 2004 - 2005, 2005 - 2006 and 2006 - 2007 in South-eastern Anatolian, Turkey. The objective of the study was to compare planting methods and varieties of spring durum wheat (Triticum turgidum var. durum Desf.) for grain yield, yield components, some grain qualities and black point disease. An experiment was conducted as a randomized complete block design with four replications using a split plot treatment arrangement. The result revealed that planting methods had significant effect on yield and yield contributing characters except harvest index, vitreousness, protein content and black point disease. Interactions between planting methods and varieties were also significant for most yield components. Although the mean grain yield (6.29 t ha-1) in flat planting method was 4% higher than bed planting method (6.04 t ha-1), the SarA±canak-98 produced the highest grain yield (6.77 t ha-1) with bed planting method. However, AydA±n-93 produced the lowest (4.97 and 5.26 t ha-1) with bed and flat planting, respectively. All the yield components were significantly influenced by cultivars. Among the varieties, SarA±canak-98 was the best performer in bed planting system owing to desired yield components. Also, an appropriate genotype for bed planting should have broad leaf area and ground cover due to protection the evaporation from soil in South-eastern Anatolia irrigated area. Percentage of black point disease was much less severe in wheat plants grown on bed planting than in those on flat beds. Furthermore, bed planting decreased black point disease by more than 19%. It may be concluded that bed planting method is suitable for wheat in irrigated area when appropriate genotypes are used.
Key words: Bed planting, black point disease, durum wheat, chlorophyll content, quality traits, yield, yield components.
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An experiment was conducted at Indore during winter 1995-97 to study the influence of planting dates and N levels on yield and quality of durum wheat (Triticum durum Desf.). The results revealed that the maximum grain yield (4.8 tonnes/ha), response to N application ( (19.3 kg grain/kg N) and return eRs 16.0) per rupee invested on fertiliser N were obtained in 1 November sowing. The yield and quality traits of durum wheat were significantly influenced by the planting dates and nitrogen levels. Sedimentation value and protein content increased, while percentage of yellow-berry kernels decreased significantly under late planting compared to early planting. Similarly, at higher N levels, sedimentation value and protein content increased and yellow berry percentage decreased. Early planting with high nitrogen levels assured high yield but the good quality grain was obtained under late planting.
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Use of suitable variety, optimum planting time and seed rate play an important role in getting the maximum yield of wheat crop. The study was conducted to find out the most suitable wheat variety, optimum planting time and economically suitable seed rate under the rain fed conditions of Potohar region during 20042005 to 2005 2006 at NARC, Islamabad. Wheat varieties/line tested were NR-234 (advance line), Wafaq-2001, Margalla-99 and G.A 2002 were sown during mid of November and mid of December, using the four different seed rates i.e. 80, 100, 120 and 140 Kg ha. The lay out design used was RCBD split-split arrangement with three replications having 25 cm row spacing. All other agronomic, cultural and plant protection measures were kept at par. Various parameters including number of plants m, plant height, spike length, spikelets spike, number of tillers m, 1000 grain weight, biological yield, grain yield and harvest index were studied. Due to the better yield components maximum grain yield (3.23 t ha) was recorded in the crop planted during the mid of November as compared with the crop planted during the mid of December having grain yield of 2.31 t ha. Significant differences in grain yields were also recorded due to the different wheat varieties/line but no differences in grain yields were recorded due to the different seed rates.
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This research was carried out in experimental field of Southeastern Anatolia Agricultural Research Institute in randomized split bloc design with three replications for three years (2004 - 2005, 2005 - 2006 and 2006 - 2007 growing seasons). The objective of this study was to determine the effects of seeding rates on grain yield and yield components of two durum wheat cultivars (Aydin-93 and Firat-93) under permanent bed planting in cotton–wheat cropping system. Six seeding rates (50, 150, 250, 350, 450 and 550 seed per m-2) were tested. Seeding rate affected grain yield and yield components except for protein content, but its effects is being altered from year to year. The results revealed that 253 seed per m-2 (111 kg ha-1) proved as predicted optimum seed rate; producing highest grain yield (5162 kg ha-1) as regards averages of all years. Among varieties, significant differences were found for yield and yield parameters.
Key words: Chlorophyll content, durum wheat, grain yield, grain quality, seeding rate, permanent bed planting.
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30-day yield
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This study was conducted to evaluate the yield performance of different maturity groups of maize varieties at different planting dates under the marginal rainfall conditions of the rainforest ecology of Nigeria and identify the high yielding ones. The maize varieties were evaluated on five and three different planting dates in 2001 and 2005 late cropping seasons respectively. Seven planting dates were used in 2002 and 2006 early cropping seasons. All plantings were done at a weekly interval. Data were obtained on grain yield and yield components. Grain yield and yield components decreased as planting was delayed in the late seasons while in the early seasons they showed contrasting trend. To obtain optimum yield for the maturity classes evaluated, the varieties must be planted about the end of August or first week of September for the late season and about the middle of April in the early season. At the optimum planting date TZEE- WSRBCs and ACR 90 POOL16-DT with grain yield of 3.8 tons ha-1 and 6.4 tons ha-1 were the highest yielding varieties in 2001 and 2002 respectively. In 2005 late cropping season, TZECOMP3DT (1.7 tons/ha) was the highest yielding while in 2006 early cropping seasons, ACR 95 TZECOMP4C3 (4.37 tons/ha) was the highest yielding variety.
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The field experiment was conducted during rabi sesone 2015-16 to generate the ground truth data of wheat crop. The experiment was conducted in Split Plot Design and replicated four times. The treatment comprised of three dates of sowing viz. 25th November (D1), 10th December (D2) and 25th December (D3) kept as a main plot with three varieties viz. PBW-343 (V1), PWB-502 (V2) and LOKE-1 (V3) kept as a subplot. The crop weather condition overestimated the plant height, total dry matter (g/m2), leaf area index, days taken to 50% flowering, days taken to maturity, RGR, CGR, number of effective tillers per spike, grain yield (kg ha-1), 1000 grains weight (g), number of grains spike-1, days taken to maturity, grain yield and harvest index of wheat crop grown in region. The lowest error percent was recorded in a timely sown crop of wheat (November 25th) with PBW-343 variety (D1V1) and error percent increased with delay in sowing. The crop growth in wheat crop depicted well the variation in yield due varying crop growth environment based on different dates of sowing. The grain yield events were close to observed values in a timely sown crop suggested that the yield was well within the accepted limits, therefore the predicting wheat yield events in the regions of Uttar Pradesh, where the experiment was conducted
Uttar pradesh
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