A preliminary assessment of the adaptation of semi-dwarf wheat varieties to the Ord River valley

1968 ◽  
Vol 8 (32) ◽  
pp. 349 ◽  
Author(s):  
DF Beech ◽  
MJT Norman
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
River Valley ◽  
Research Station ◽  
Grain Production ◽  
Lower Yield ◽  
Preliminary Assessment ◽  
Wheat Varieties ◽  
Dwarf Wheat ◽  
General Response

In the 1966 dry season at Kimberley Research Station in the Ord River valley, the performance under irrigation of three semi-dwarf wheat varieties was compared with that of two Australian varieties at three times of sowing and three levels of nitrogen fertilizer in factorial combination. The general response of the semi-dwarf varieties to time of sowing did not differ from that of the Australian varieties. All varieties, at 0 and 160 lb an acre N, gave higher grain yields when sown in late May than when sown in mid-April or late June. At 320 lb an acre N, each variety gave approximately the same grain yield whether sown in mid-April or late May, with a lower yield from late June sowings. All varieties increased in grain yield between 0 and 160 lb an acre N, but when nitrogen was increased from 160 to 320 lb an acre, the yield of the Australian varieties declined while that of the semi-dwarf varieties either increased or remained approximately the same. As a group, the semi-dwarf varieties differed only from the Australian varieties in their ability to use a high uptake of nitrogen for grain production, in their greater harvest index, 2nd in their lower grab nitrogen content. The highest yields, 75-80 bushels an acre, were obtained from Mexico 120 and Chile 1B.

Response to time of sowing of a range of wheat and barley variteties in the Ord River valley

1971 ◽  
Vol 11 (51) ◽  
pp. 444
Author(s):  
SF Beech ◽  
T NormanMJ
Keyword(s):  
Maximum Yield ◽  
Limited Range ◽  
River Valley ◽  
Research Station ◽  
Lower Yield ◽  
Wheat Varieties ◽  
Progressive Decline ◽  
Wide Range ◽  
The Mean ◽  
Maturity Groups

At Kimberley Research Station in the Ord River valley, 40 wheat and 20 barley varieties, originating in a wide range of environments, were sown under irrigation at three dates in April-June. The varieties were assigned to maturity groups (five for wheat, four for barley) on the basis of the mean period from sowing to anthesis for the three sowings. The results with wheat confirmed previous experiments with oats and a limited range of wheat varieties : that maximum yield is attained when varieties come into anthesis in late July-early August and that yield is reduced if anthesis occurs before or after this period. Barley varieties showed a progressive decline in yield with later date of anthesis after mid-July, but since no barley varieties reached anthesis before mid-July even when sown in late April-the earliest practicable date-it was not established whether earlier anthesis would have been associated with lower yield

scholarly journals Patterns of tillering and grain production of winter wheat at a wide range of plant densities.

1978 ◽  
Vol 26 (4) ◽  
pp. 383-398 ◽  
Author(s):  
A. Darwinkel
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Harvest Index ◽  
Plant Density ◽  
Fold Increase ◽  
Grain Production ◽  
Higher Plant ◽  
Grain Number ◽  
Wide Range ◽  
Plant Densities

The effect of plant density on the growth and productivity of the various ear-bearing stems of winter wheat was studied in detail to obtain information on the pattern of grain production of crops grown under field conditions. Strong compensation effects were measured: a 160-fold increase in plant density (5-800 plants/m2) finally resulted in a 3-fold increase in grain yield (282 to 850 g DM/m2). Max. grain yield was achieved at 100 plants/m2, which corresponded to 430 ears/m2 and to about 19 000 grains/m2. At higher plant densities more ears and more grains were produced, but grain yield remained constant. Tillering/plant was largely favoured by low plant densities because these allowed tiller formation to continue for a longer period and a greater proportion of tillers produced ears. However, at higher plant densities more tillers/unit area were formed and, despite a higher mortality, more ears were produced. The productivity of individual ears, from main stems as well as from tillers, decreased with increasing plant density and with later emergence of shoots. In the range from 5 to 800 plants/m2 grain yield/ear decreased from 2.40 to 1.14 g DM. At 800 plants/m2 nearly all ears originated from main stems, but with decreasing plant density tillers contributed increasingly to the number of ears. At 5 plants/m2, there were 23 ears/plant and grain yield/ear ranged from 4.20 (main stem) to 1.86 g DM (late-formed stems). Grain number/ear was reduced at higher densities and on younger stems, because there were fewer fertile spikelets and fewer grains in these spikelets. At the low density of 5 plants/m2, plants developed solitarily and grain yield/ear was determined by the number of grains/ear as well as by grain wt. Above 400 ears/m2, in this experiment reached at 100 plants/m2 and more, grain yield/ear depended solely on grain number, because the wt. of grains of the various stems were similar. The harvest index showed a max. of about 44% at a moderate plant density; at this density nearly max. grain yield was achieved. At low plant densities the harvest index decreased from 45% in main stems to about 36% in late-formed stems. However, no differences in harvest index existed between the various ear-bearing stems if the number of ears exceeded 400/m2. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals ESTIMATION OF SOME GENETIC PRAMETERS IN DURUM WHEAT

2017 ◽  
Vol 48 (2) ◽  
Author(s):  
Almajidy & et al.
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Harvest Index ◽  
Agricultural Research ◽  
Block Design ◽  
Selection Index ◽  
Research Station ◽  
Genetic Progress ◽  
Environmental Variance ◽  
High Heritability

To estimate genetic parameters and heritability in durum wheat (Triticum turgidum var. durum) genotypes, seventeen genotypes (16 exotic from ICARDA and local variety (Buhooth 7)) were included in this study. This experiment was conducted using a randomized complete block design with three replications at Field Crops Research Station, Abu-Graib, Office of Agricultural Research, during 2011-2012 and 2012-2013. The results revealed significant differences among genotypes for the studied characters at both seasons. The best genetic/environmental variance ratio attained for spike length (11.90) and no. of spikes. m-2 (9.22) in the first season, and grain yield (8.82) then harvest index (4.87) in the second season. High GCV observed for grain yield (15.68), no. of spikes. m-2 (15.18) in the first season, and harvest index (16.89) and grain yield (14.22) in the second season. High heritability estimates associated with high genetic advance for no. of spikes. m-2, in the first season. While, moderate h2bs estimates associated with high GA for same trait in the second season. Expected response to selection ranged from 0.93 to 84.6, also selection index ranged from 1.23 to 106.44 for grain yield and number of spikes. m-2, respectively in the first season also the same pattern was observed for value of second season. Characteristics like no. of spikes. m-2, plant height, no. of grains. Spike-1 and grain weight showed high heritability coupled with high genetic progress. Therefore, these characters should be given top priority during selection breeding in durum wheat.

Varietal performance of transplant aman rice under different hill densities

1970 ◽  
Vol 34 (1) ◽  
pp. 33-39 ◽  
Author(s):  
MAT Sohel ◽  
MAB Siddique ◽  
M Asaduzzaman ◽  
MN Alam ◽  
MM Karim
Keyword(s):  
Grain Yield ◽  
Key Words ◽  
Harvest Index ◽  
Block Design ◽  
Grain Weight ◽  
Row Spacing ◽  
Lower Yield ◽  
Straw Yield ◽  
Randomized Complete Block Design ◽  
Biological Yield

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh from July to December 2004 to evaluate the effect of hill spacing on the performance of BRRI dhan40 and BRRI dhan41 as Transplant aman crop. The experiment consisted of five hill spacings viz., 5cm. 10cm, 15 cm, and 25 cm where row to row spacing of 25 cm was kept constant for all treatments. The experiment was laid out in randomized complete block design with four replications. The 25 cm x 5 cm hill spacing produced the tallest plant, highest total number of tillers/hill, bearing tillers/hill lowest number of non-hearing tillers/hill, grain yield and harvest index, while 25 cm x 5 cm hill spacing produced the highest number of sterile spikelets/panicle, straw yield and biological yield. BRRI dhan41 produced higher grain yield (4.7 t/ha) which was the contribution of higher number of grains/panicle and heavier grain weight. Lower yield (4.51 t/ha) was recorded in BRRI dhan40.Key Words: Varietal performance; T. aman rice; hill density.DOI: 10.3329/bjar.v34i1.5750Bangladesh J. Agril. Res. 34(1) : 33-39, March 2009

Effect of plant density and detopping following silking on cob growth, fodder and grain yield of maize (Zea mays)

1992 ◽  
Vol 119 (3) ◽  
pp. 297-301 ◽  
Author(s):  
S. K. Roy ◽  
P. K. Biswas
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Plant Density ◽  
Agricultural Research ◽  
Dry Weight ◽  
Research Station ◽  
Maize Crop ◽  
Significant Difference ◽  
Fodder Yield ◽  
Stem Reserves

SUMMARYMaize was grown al the Regional Agricultural Research Station, Hathazari, Bangladesh during 1988/89 and 1989/90 to study fodder yield, cob growth and grain yield together with the contribution of pre-silking stem reserves to grain. Population densities were 33300, 44400 and 66600 plants/ha. Plants were either detopped after silking and pollen shedding, keeping 0, 2 or 3 leaves above the cob, or were left entire.The results showed that the maize crop could successfully be detopped for fodder with little or no adverse effect on grain yield. Fodder yield increased with increased plant density and among the detopping treatments the highest fodder yield was obtained when the plants were detopped just above the cob. Cob growth followed a sigmoid pattern and the highest dry weight per cob was obtained from the lowest plant density and from entire plants. The number of cobs/m2 increased with increased plant density but detopping treatments did not give any significant difference in relation to densities. The number of grains/cob was highest with 33300 plants/ha but, among the detopping treatments, plants detopped just above the cob had the lowest number of grains/cob in both years. Weight of 1000-grain decreased with increasing plant density but it was increased by detopping plants just above the cob during 1988/89, although it was decreased in 1989/90. The highest apparent translocation of pre-silking reserves was obtained using densities of 44400 plants/ha but detopping treatments did not show any consistent effect, although the highest apparent translocation (20%) and harvest index (58%) were obtained from plants detopped just above the cob.

A high-yielding Mexican semi-dwarf wheat and the relationship of yield to harvest index and other varietal characteristics

1970 ◽  
Vol 10 (44) ◽  
pp. 350 ◽  
Author(s):  
JR Syme
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Accession Number ◽  
Wide Range ◽  
Dwarf Wheat ◽  
Highly Correlated ◽  
Relationship Of ◽  
The Relationship

A study has been made of a Mexican semi-dwarf wheat (Lerma Rojo X Norim 10- Brevor 14) Andes3, local accession number WW 15. In 53 trials, over two seasons and a wide range of conditions, this has shown a marked grain yield superiority over other Mexican and Australian varieties when grown in high yielding environments. Nine varieties in five trials were sampled at maturity. Varietal grain yield was highly correlated with harvest index and with the number of grains set relative to straw and chaff weight. WW 15 excelled in both ratios, and combined a dense ear population with many grains per ear.

The effect of time of planting on yield attributes of oat varieties in the Ord River Valley

1966 ◽  
Vol 6 (22) ◽  
pp. 250
Author(s):  
DF Beech ◽  
MJT Norman
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Close Relation ◽  
Sowing Date ◽  
Dry Season ◽  
River Valley ◽  
Research Station ◽  
Dry Matter Yield ◽  
Yield Attributes ◽  
Steep Rise

During the 1964 dry season a study was made at Kimberley Research Station of the effect of time of sowing on the yield attributes of oats grown under irrigation. Two varieties, Avon and Ballidu, were sown at four dates from May to July. Avon, the later variety of the two, declined in grain yield from the first sowing onward and gave a negligible yield at the last two sowings. Ballidu reached maximum grain yield at the second sowing and gave a negligible yield at the last sowing. It appeared that, as in wheat, the major factor influencing grain yield in relation to time of sowing was the steep rise in temperature from August onward. There was a close relation between date of anthesis and grain yield irrespective of variety. Maximum grain and dry matter yield would be expected if sowing date were selected to bring a given variety to anthesis in early August.

scholarly journals Varietal Screening of Wheat against Blast Disease

2019 ◽  
pp. 1-12
Author(s):  
Mahmuda Akter Bhuiyan ◽  
A. H. M. Mahfuzul Haque ◽  
Md. Monirul Islam ◽  
Gazi Tamiz Uddin
Keyword(s):  
Grain Yield ◽  
Fungal Pathogens ◽  
Agricultural Research ◽  
Disease Incidence ◽  
Bipolaris Sorokiniana ◽  
Blast Disease ◽  
Research Station ◽  
Wheat Varieties ◽  
The Status ◽  
Aspergillus Sp

The study was conducted to evaluate the effects of different wheat varieties against blast disease and to observe the status of seed health of collected wheat varieties. The study was carried out under experimental field and laboratory condition at the Plant Pathology and Seed Science Department, Sylhet Agricultural University, Sylhet during October to March (2016-2017). The seeds collected from the Regional Agricultural Research Station, Jessore including ten different varieties, viz., BARI Gom19, BARI Gom22, BARI Gom23, BARI Gom24, BARI Gom25, BARI Gom26, BARI Gom27, BARI Gom28, BARI Gom29, BARI Gom30 were used in both laboratory and field conditions. In the laboratory, different fungal pathogens like Fusarium oxysporum, Bipolaris sorokiniana, Aspergillus sp., Alternaria sp., Rhizophus sp., Curvularia sp. and Magnaporthe oryzae Triticum were detected using a standard blotter method. In the field, it was found that BARI Gom28 was moderately resistant against blast. It had the lowest disease incidence (21.66%), lowest severity (30%) and also highest result in term of grain yield (5.5 t ha-1). The highest blast disease incidence (66.67%), highest severities (78.33%) and lowest grain yield (1.6 t ha-1) were found in BARI Gom26.

scholarly journals Growth, Yield and Quality of Wheat Varities as Affected by Different Levels of Nitrogen

2015 ◽  
Vol 18 (1) ◽  
pp. 89-98
Author(s):  
H Mondal ◽  
S Mazumder ◽  
SK Roy ◽  
TA Mujahidi ◽  
SK Paul
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Block Design ◽  
Growth Yield ◽  
Matter Content ◽  
Leaf Length ◽  
Dry Matter Content ◽  
Wheat Varieties ◽  
Nitrogen Levels ◽  
Four Levels

A field experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during November 2012 to March 2013 to evaluate the response of three (3) wheat varieties viz., BARI Gom23, BARI Gom24 and BARI Gom25 under four levels of nitrogen fertilizer i.e, 75, 100, 125 and 150 kg N ha-1. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Results showed that plant height, number of leaves plant-1, leaf length and dry matter content were significantly affected due to varieties and/or nitrogen levels. Grains ear-1, number of fertile grains plant-1, 1000-grain weight, grain yield and harvest index were also significantly influenced by varieties and/or nitrogen levels. The value of all parameters studied in this experiment increased with increasing nitrogen levels up to 125 kg N ha-1 and thereafter decreased with fertilizer increasing level. Combination results showed that BARI Gom-24 with application of 125 kg N ha-1 gave the maximum grain yield (4.71 t ha-1), harvest index (49.37 %) and protein content (10.88%).Bangladesh Agron. J. 2015, 18(1): 89-98

scholarly journals Effect of Sowing Dates and Varieties on Yield and Quality Performance of Wheat (Triticum aestivum L.)

2019 ◽  
Vol 39 (04) ◽  
Author(s):  
Mohammad Yusuf ◽  
Satish Kumar ◽  
A K Dhaka ◽  
Bhagat Singh ◽  
Axay Bhuker
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Protein Content ◽  
Harvest Index ◽  
Triticum Aestivum L ◽  
Test Weight ◽  
Wheat Varieties ◽  
Quality Performance ◽  
Yield And Quality ◽  
Sowing Dates

A field experiment conducted during Rabi season of 2017-18 at wheat research farm of CCS Haryana Agricultural University, Hisar, India to study the effect of sowing dates and varieties on yield and quality performance of wheat (Triticum aestivum L.). The experiment was laid out in split plot design with three replications containing four sowing dates viz. 5th November, 25th November, 15th December and 5th January as main plot treatments and seven wheat varieties i.e. HS 562, HD 2967, HD 3086, HI 1544, MACS 6222, WR 544 and WH 1105 as sub plot treatments. On the basis of one year study it was concluded that among sowing dates, 5th November sowing is the most economical and suitable than rest of the sowing dates. 5th November sown crop recorded significantly longer spike (11.7 cm), higher number of effective tillers (98.3 per mrl), grains per spike (48.6), test weight (39.9 g), grain appearance score (8.3), hectoliter weight (82.9 kg/hl), grain yield (5432 kg ha-1) and harvest index (39.0%) compared to rest of the sowing dates, while highest protein content (12.9 %) was observed with 5th January sown crop. Maximum net return (Rs.54, 262 ha-1) and B: C (1.73) were recorded with 5th November sowing. Among the varieties, HI 1544 recorded significantly higher number of effective tillers (94.6 per mrl), grains per spike (48.4), test weight (38.6 g), grain yield (4920 kg ha-1) harvest index (39.2), grain appearance score (8.1) and hectoliter weight (82.0 kg/hl), while variety WH 1105 resulted in longer spike (11.5 cm) and WR 544 in higher protein content (12.6 %) as compared to rest of the varieties. While comparing the interaction of varieties with date of sowing, HI 1544 produced significantly higher grain higher yield (6007 kg ha-1) of wheat sown at 5th November which was statistically at par with WH 1105 (5833 kg ha-1) and HD 3086 (5616 kg ha-1) at same date of sowing. Delayed sowing of HI 1544 from 5th November to 25th November reduced the grain yield by 9.1 per cent; to 15th of December by 21.0 per cent and to 5th January by 42.3 per cent.

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