The growth of safflower (Cathamus tinctorius L.) in a low latitude environment

1965 ◽  
Vol 16 (5) ◽  
pp. 801 ◽  
Author(s):  
WR Stern ◽  
DF Beech
Keyword(s):  
Grain Yield ◽  
Seed Development ◽  
Dry Matter ◽  
Research Station ◽  
Nitrogen Application ◽  
Crop Canopy ◽  
Low Latitude ◽  
Seed Formation ◽  
One Year ◽  
Nitrogen Treatments

At the Kimberley Research Station, W.A., growth studies on safflower were made on a uniform crop in one year, and in the following year on a density experiment and a time of nitrogen application experiment. Density treatments extended from 25 to 1120 plants m-2, to exploit as fully as possible the light environment in the crop canopy. In the nitrogen treatments, 90 kg ha-1 of nitrogen was applied at seeding, elongation, and budding in an attempt to increase grain yield by increasing the size of the terminal inflorescences. Although at higher densities the light microenvironment was exploited early there was no increase in total dry matter, and grain yield was highest with densities of about 100 plants m-2. In the nitrogen experiments the early indications of higher yields due to treatment did not materialize as the crop matured, because rising temperatures at flowering and during seed development retarded further growth. On the average, grain yield or economic yield constituted 20% of the total dry matter of tops. There was a greater difference in total dry matter and grain yield between years than between treatments within one year, and this was interpreted as a time of planting effect. The effects of rising temperatures during seed formation are discussed. Avenues for further work are suggested.

scholarly journals Effect of Nitrogen Fertilizer and Its Application Efficiency on Two Local Sorghum Cultivars Sorghum bicolor L. Moench

2017 ◽  
Vol 9 (4) ◽  
pp. 236
Author(s):  
Abdulla A. Mohamed Muflahi ◽  
Ahmed Saleh Basuaid
Keyword(s):  
Grain Yield ◽  
Sorghum Bicolor ◽  
Nitrogen Fertilizer ◽  
Agricultural Research ◽  
Nitrogen Efficiency ◽  
Nitrogen Fertilizers ◽  
Research Station ◽  
Nitrogen Application ◽  
Four Levels ◽  
Sorghum Bicolor L

A field experiment was carried out at El-Kod Agricultural Research Station, Abyan Delta, Abyan Governorate during the seasons 2014 and 2015 in soil sandy silt to assess four levels of nitrogen fertilizers (0, 55, 110 and 165 kg N/ha) utilizing urea fertilizer (46% N) on some crop characteristics and efficiency of nitrogen application on two local cultivars of sorghum (Sorghum bicolor L. Moench). Split plot design was applied in four replicates. Fertilizer levels were distributed in main plots whereas, the cultivars in subplots. The results revealed significant differences between cultivars Benny and Saif in all characteristics during the two seasons. Cultivar Benny was significantly superior to cultivar Saif in all crop characteristics, except the length of spike which was significantly superior in Saif cultivar compared to cultivar Benny in both seasons. The increase in nitrogen level led to significant increase in all parameters of crop growth under study in both seasons, where the highest dose of nitrogen (165 kg N/ha) gave highest grain yield (3013 and 3201 kg/ha) in both seasons respectively, while the efficiency of nitrogen utilization declined with increased level of nitrogen application and highest value in nitrogen efficiency (12.78 kg grain/kg N). The interaction between cultivars and nitrogen fertilizer showed significant differences in terms of all studied parameters during both seasons. The cultivar Benny responded to high level of nitrogen (165 kg N/ha) and gave high grain yield (3640 and 3305 kg/ha) in both seasons respectively. The results yielded significant effect for efficiency of nitrogen application on grain yield between the cultivars, the levels of fertilizers and their interaction in the first season whereas, no significant differences were detected in the second season.

Grain yield, dry matter remobilization and chlorophyll content in maize (Zea mays L.) as influenced by nitrogen and water deficit

2018 ◽  
Vol 44 (3) ◽  
pp. 359-356
Author(s):  
Mahta Haghjoo ◽  
Abdollah Bahrani
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Chlorophyll Content ◽  
Water Deficit ◽  
Chlorophyll A ◽  
Dry Matter ◽  
Zea Mays L ◽  
Nitrogen Application ◽  
Significant Difference ◽  
Biological Yield

Out of 20, 40, 60 and 80 per cent moisture depletion 20% showed significantly higher grain yields, biological yield, chlorophyll a, b than the others. However, the highest contribution of stem and leaf dry matter remobilization in grain yield were obtained in 80% moisture depletion and 300 kg N/ha and the lowest one was found in the 20% moisture depletion and 150 kg N/ha. Nitrogen application increased all traits, however there were no significant difference between 250 and 300 kg N/ha.

The timing of nitrogen application for spring barley

1984 ◽  
Vol 102 (3) ◽  
pp. 673-678 ◽  
Author(s):  
D. L. Easson
Keyword(s):  
Grain Yield ◽  
Spring Barley ◽  
Nitrogen Control ◽  
Nitrogen Application ◽  
Grain Yields ◽  
Grain Nitrogen ◽  
Nitrogen Treatments

SummaryThree experiments were carried out in which nitrogen was applied to spring barley (cv. Midas) either all in the seed bed or as a divided dressing with 10 or 25 kg/ha in the seed bed and 50 or 60 kg applied at emergence or 10, 20, 30, 40, 50, 60 or 70 days after emergence. Applying part of the nitrogen as a top dressing up to 30 days after emergence and 50 days after emergence had no significant effects on the grain and straw yields respectively, compared with applying all the nitrogen in the seed bed. Grain yields were progressively reduced with top dressings from 40 days after emergence (first node stage) onwards. Applications at 60 or 70 days did not give more grain yield than the no-nitrogen control, but gave straw yields which were intermediate between the no-nitrogen and seed-bed nitrogen treatments. Top dressing at 40 days after emergence stimulated tiller survival but did not improve grain yield because there were fewer grains per ear. Thousand-grain weights were lowest with top dressings at 50 days after emergence and grain nitrogen increased progressively with delay in top dressings from 30 days after emergence onwards.

Growth and productivity of irrigated Sorghum bicolor (L. Moench) in northern Australia. I. Plant density and arrangement effects on light interception and distribution, and grain yield, in the hybrid Texas 610SR in low and medium latitudes

1982 ◽  
Vol 33 (5) ◽  
pp. 773 ◽  
Author(s):  
RC Muchow ◽  
DB Coates ◽  
GL Wilson ◽  
MA Foale
Keyword(s):  
Grain Yield ◽  
Structural Adjustment ◽  
Dry Matter ◽  
Plant Density ◽  
Grain Filling ◽  
Dry Matter Production ◽  
Northern Australia ◽  
Low Latitude ◽  
Matter Production ◽  
Sorghum Bicolor L

The influence of plant arrangement and density on yield of the grain sorghum hybrid Texas 610SR grown as an irrigated dry season crop in the Ord Irrigation Area (lat. 16�S) was determined. Neither the rate of dry matter production nor the pattern of partitioning of dry matter during grain-filling varied between treatments, and grain yield was unresponsive to row spacings below 75 cm and densities above 267000 plants ha-1. The results were analysed by considering the effect of radiation interception and distribution in the canopy on dry matter production. The opportunity was then taken to compare this trial, and two others conducted at the same low latitude where grain yield was unresponsive to density, with four trials conducted at higher latitudes (27�S.) where Texas 610SR was very responsive to density. The effect is shown to be associated with radiation penetration into canopies. In the low latitude trials the poorer penetration of photosynthetically active radiation (PAR) into high density stands could have resulted from lack of structural adjustment of the canopy, in contrast to the experience at medium latitude. Equally, there may have been an effect of lower solar angles at low latitude, resulting in the poorer PAR distribution. The consequence was a failure of response of dry matter production to increasing density, reflected in grain yield.

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.

Effects of dicyandiamide (a nitrification inhibitor) on leaching of nitrogen and growth of cereals

1987 ◽  
Vol 27 (1) ◽  
pp. 127 ◽  
Author(s):  
MG Mason
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Field Experiments ◽  
Potential Problem ◽  
Nitrate Nitrogen ◽  
Nitrification Inhibitor ◽  
Ammonium Nitrogen ◽  
Nitrogen Application ◽  
Yield Increase ◽  
Matter Production

Dicyandiamide (DCD) was tested as a nitrification inhibitor with urea in 10 field experiments (ammonium nitrate was included in 2 of them) in 3 years on sites where leaching of nitrogen was a potential problem. The investigations included different rates and times of nitrogen application. At 1 site in 1982 and 2 in 1983 the soil was sampled to 30cm throughout the season. Nitrification of ammonium nitrogen was delayed by DCD (applied as a mixture with urea and supplying 10% ofthe nitrogen in the mixture) by up to 30 days compared with untreated urea and reduced the danger of nitrogen leaching. Early sampling at the 1982 site showed increased uptake of ammonium nitrogen and decreased nitrate nitrogen in wheat plants receiving DCD-treated urea compared with those receiving untreated urea. This confirmed that DCD inhibits nitrification. The only significant (P<0.05) grain yield increase from DCD was a 22% increase from an application of nitrogen at sowing on a particularly highly leaching soil. DCD significantly (P < 0.05, P < 0.01) reduced grain yield (7 and 8%) and vegetative yield (1 3 and 9%) at 2 sites. DCD increased vegetative yield by 16% at 1 site (not the same site as the grain yield increase). In 2 of 3 experiments plant dry matter production (up to 11 weeks after sowing) was significantly (P < 0.05 to P < 0.001) reduced (up to 30%) by DCD application. The final value of the use of DCD will depend on the balance between the benefit in preventing nitrogen losses by leaching at a particular site and the harm caused by suppressing early plant growth.

The grain yield of winter-grazed crops

1977 ◽  
Vol 17 (86) ◽  
pp. 452 ◽  
Author(s):  
PR Dann ◽  
A Axelsen ◽  
CBH Edwards
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Grain Production ◽  
Winter Rape ◽  
Dual Purpose ◽  
Grain Yields ◽  
One Year ◽  
Better Than

In six years of experiments various grazing treatments were applied to a range of crops and subsequent grain yields measured. Spring rapes, lupins and peas showed little potential for dual purpose grazing/grain use, generally producing less herbage and grain than wheat, oats, barley and rye. Winter rape performed as well as barley and wheat in one year. Oats and barley were overall better than wheat which was generally better than rye. Comparison of late-sown grain-only crops with early sown grazed ones indicated that with some crops in some years the dual-purpose enterprise was the more profitable. The experiments suggested that the most biologically profitable combination of herbage and grain production would be obtained by delaying grazing until about 4t of crop dry matter per ha were available in winter.

scholarly journals Influence of nitrogen application on direct seeded rice in old and new Cauvery Delta zone of Tamil Nadu, India

2021 ◽  
Vol 13 (4) ◽  
pp. 1462-1469
Author(s):  
K. Sathiya Bama ◽  
K. R. Babu ◽  
R. Sharmila ◽  
A. Anuradha
Keyword(s):  
Grain Yield ◽  
Tamil Nadu ◽  
Field Experiments ◽  
Agricultural Research ◽  
Research Station ◽  
Nitrogen Application ◽  
Water Release ◽  
N Application ◽  
Direct Seeded ◽  
Cauvery Delta

Direct seeded rice is a boon to farmers where the water release from the reservoir is delayed. Nitrogen fertiliser management is one of the strategies bto rectify the nutrient-related issue in Direct seeded rice. The present study aimed to optimize the nitrogen dose for direct-seeded rice in the new and old Cauvery delta zone of Tamil Nadu. Field experiments were conducted during kuruvai and samba seasons at Tamil Nadu Rice Research Institute, Aduthurai and Agricultural research station Thanjavur representing old and new Cauvery delta regions during 2019-20 and 2020-21. Totally from eight experiments, the results of four field experiments in each location revealed the highest grain yield in the treatment T6 -application of 150 kg Nha-1 (5596kg/ha) which was statistically on par with treatment T5 -125kg N/ha (5326 kg/ha) in old delta and new delta. The higher grain yield was recorded in the T6 (5140 kg/ha), statistically on par with T5 (4550 kg/ha). The higher available nitrogen content of 312 kg/ ha,292 kg/ha was recorded for N application @ 150kg/ha, which was statistically on par with  309 kg/ha and 289 kg/ha, respectively, both the kuruvai and samba seasons for N application of 125 kg/ha. In the new CDZ, the same trend was followed as that of the old delta. Based on economics, N applied @125 kg/ha recorded a higher BC ratio for direct-seeded rice. For the benefit of farmers of both deltaic regions, the nitrogen application of 125 kg ha-1 for direct-seeded rice is recommended.

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