Seed Characters and Germination in Soyabean

1979 ◽  
Vol 15 (4) ◽  
pp. 385-392
Author(s):  
D. Nangju
Keyword(s):  
Glycine Max ◽  
Seed Size ◽  
Rainy Season ◽  
Screening Programme ◽  
Intense Rainfall ◽  
Infected Seed ◽  
Clean Seed ◽  
Seed Characters ◽  
Highly Correlated ◽  
Ibadan Nigeria

SUMMARYTwenty-five cultivars of soyabean (Glycine max (L.) Merr.), differing in their origin, crop duration and seed size, were planted four times at bi-weekly intervals during the major rainy season at Ibadan, Nigeria and harvested at optimum maturity or two weeks later. Delayed harvest and intense rainfall during pod maturation were essential for selecting for resistance to field weathering, but 2 weeks' delay enabled susceptible and resistant cultivars to be identified. Percentage of infected seed had the highest correlation with potential germination at harvest (r=−0·869**) but may not be a suitable criterion for use in a screening programme. An alternative would be to screen cultivars for resistance to weathering on the basis of seed size and the proportion of smooth and clean seed, since these characters were highly correlated to potential germination (r=−0·562** and 0·632** respectively).

Effect of herbicides on the weed infestation and grain yield of soybean (Glycine max)

2004 ◽  
Vol 52 (2) ◽  
pp. 199-203 ◽  
Author(s):  
G. Singh ◽  
R. S. Jolly
Keyword(s):  
Glycine Max ◽  
Grain Yield ◽  
Weed Control ◽  
Negative Correlation ◽  
Rainy Season ◽  
Dry Matter ◽  
Field Experiments ◽  
Sand Soil ◽  
Loamy Sand Soil ◽  
Weed Infestation

Two field experiments were conducted during the kharif (rainy) season of 1999 and 2000 on a loamy sand soil to study the effect of various pre- and post-emergence herbicides on the weed infestation and grain yield of soybean. The presence of weeds in the weedy control plots resulted in 58.8 and 58.1% reduction in the grain yield in the two years compared to two hand weedings (HW) at 30 and 45 days after sowing (DAS), which gave grain yields of 1326 and 2029 kg ha-1. None of the herbicides was significantly superior to the two hand weedings treatment in influencing the grain yield. However, the pre-emergence application of 0.75 kg ha-1 S-metolachlor, and 0.5 kg ha-1 pendimethalin (pre-emergence) + HW 30 DAS were at par or numerically superior to this treatment. There was a good negative correlation between the weed dry matter at harvest and the grain yield of soybean, which showed that effective weed control is necessary for obtaining higher yields of soybean.

scholarly journals Nattoking K86 soybean

1991 ◽  
Vol 71 (3) ◽  
pp. 855-856 ◽  
Author(s):  
N. R. Bradner ◽  
R. D. Simpson ◽  
A. A. Hadlock
Keyword(s):  
Glycine Max ◽  
Key Words ◽  
Seed Size ◽  
Maturity Group ◽  
Yield Performance ◽  
Glycine Max L ◽  
Cultivar Description

NattoKing K86 is a Maturity Group 00 soybean (Glycine max (L.) Merr.) cultivar having higher yield performance, smaller seed size, and later maturity than Canatto. Key words: Glycine max, NattoKing K86 cultivar, cultivar description, soybean

scholarly journals PERUBAHAN BENTUK DAN UKURAN BENIH DUA KULTIVAR KEDELAI (Glycine max (L.) Merr.) DI JATINANGOR DAN CIKAJANG

2017 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Siti Rodiah ◽  
Zulfatunnisa Zulfatunnisa ◽  
Sumadi Sumadi ◽  
Anne Nuraini ◽  
Meddy Rachmadi ◽  
...  
Keyword(s):  
Glycine Max ◽  
Low Temperature ◽  
Seed Size ◽  
Block Design ◽  
Soybean Seed ◽  
Growth Environment ◽  
Randomized Block Design ◽  
Glycine Max L ◽  
Improved Cultivars ◽  
Size Heterogeneity

The variation of the seed size in each species and individuals might be from of difference species adaptation for  a difference environment. This difference may also arise from the constraints of limited formation of seed size. The use of adaptive ciltivars on the growth environment is very influential on the succes in the farm field. This research was aimed to find the adaptation of phase and size seed of two cultivars of soybeans in Jatinangor and Cikajang. This research was held in Jatinangor (Sumedang regency) and Cikajang (Garut regency) from April to July 2016. The design that used in this research was Randomized Block Design (RBD) and Duncan at 5% rate. Improved cultivars that tested in this research were placed at Grobogan and Anjasmoro which were repeated 5 times. The results of experiment showed that adaptation of size seed showed of 100 grains and large seeds. The low temperature condition can increase of variability of seed size. Heterogeneity of environment can not sustain the size of soybean seed. Genetic and environment factors influence significantly for weight of 100 grains and seed size Grobogan in Jatinangor. The weight of 100 grains Grobogan in Jatinangor and Cikajang haved a greater than Anjasmoro. Environmental factors influence yield of soybean, weight of 100 grains of cultivars in Cikajang haved a greater than Jatinangor caused by the seed size.

Effect of date of harvest on seed quality and viability of soya beans

1977 ◽  
Vol 89 (1) ◽  
pp. 107-112 ◽  
Author(s):  
D. Nangju
Keyword(s):  
Glycine Max ◽  
Field Experiments ◽  
Seed Quality ◽  
Germination Percentage ◽  
Soya Bean ◽  
Harvest Time ◽  
Black Seeds ◽  
The Tropics ◽  
Made In ◽  
Ibadan Nigeria

SummaryField experiments were made in both 1974 rainy seasons in Ibadan, Nigeria, to evaluate the effect of harvest time on seed quality and viability of soya beans (Glycine max (L.) Merr.). The first harvest was made when about 85% of the pods had ripened and subsequent harvests were made at 7-day intervals. Delaying harvest increased the percentage purple-stained, cracked and black seeds in the first season, and of cracked seed in the second season. In the second season soya-bean seeds showed neither purpling nor dark discoloration on the seed coat; the crop matured during sunny, dry weather. However, in both seasons the reduction in seed quality was accompanied by a corresponding decrease in germination percentage. Varietal differences were noted in that the small-seeded Improved Pelican was least affected, and Hardee was the most affected by field weathering in both seasons. Kent and Bossier were intermediate between the two extremes. The results point out the importance of proper timing of harvest of soya beans in rainy seasons, and the need for screening soya beans for resistance to weathering in the tropics.

Palmer Amaranth (Amaranthus palmeri) Interference in Soybeans (Glycine max)

Weed Science ◽  
1994 ◽  
Vol 42 (4) ◽  
pp. 523-527 ◽  
Author(s):  
Tracy E. Klingaman ◽  
Lawrence R. Oliver
Keyword(s):  
Glycine Max ◽  
Field Study ◽  
Palmer Amaranth ◽  
Growth And Yield ◽  
Yield Reduction ◽  
Amaranthus Palmeri ◽  
Soybean Yield ◽  
Soybean Canopy ◽  
Highly Correlated

A 2-yr field study was conducted at Fayetteville, AR, to determine the effect of Palmer amaranth interference on soybean growth and yield. Palmer amaranth density had little effect on soybean height, but soybean canopy width ranged from 77 cm in the weed-free check to 35 cm in plots with 10 plants m–1of row 12 wk after emergence. Soybean yield reduction was highly correlated to Palmer amaranth biomass at 8 wk after emergence and maturity, soybean biomass at 8 wk after emergence, and Palmer amaranth density. Soybean yield reduction was 17, 27, 32, 48, 64, and 68%, respectively, for Palmer amaranth densities of 033, 0.66, 1, 2, 333, and 10 plants m–1of row. Soybean yield reduction and Palmer amaranth biomass were linear to approximately 2 Palmer amaranth m–1of row, suggesting intraspecific interference between adjacent Palmer amaranth is initiated at Palmer amaranth densities between 2 and 3.33 plants m–1of row.

Effects of Insecticide, Weed-Free Period, and Row Spacing on Soybean (Glycine max) and Sicklepod (Cassia obtusifolia) Growth

Weed Science ◽  
1984 ◽  
Vol 32 (5) ◽  
pp. 702-706 ◽  
Author(s):  
Robert H. Walker ◽  
Michael G. Patterson ◽  
Ellis Hauser ◽  
David J. Isenhour ◽  
James W. Todd ◽  
...  
Keyword(s):  
Glycine Max ◽  
Seed Size ◽  
Seed Weight ◽  
Significant Interaction ◽  
Soybean Seed ◽  
Row Spacing ◽  
Fresh Weight ◽  
Cassia Obtusifolia ◽  
Insecticide Treatment ◽  
Weed Interference

Results from identical experiments conducted at Headland, AL, and Plains, GA, from 1980 through 1982 show insecticide treatment had little effect on soybean [Glycine max(L.) Merr. ‘Coker 237′] growth and morphology. Maximum insecticide applications increased soybean seed weight in two of five trials. Soybeans maintained free of sicklepod (Cassia obtusifoliaL. ♯3CASOB) for 4 weeks after emergence produced yields equal to those receiving season-long control in all trials, and 2-week control was equal to season-long maintenance in three trials. Length of weed interference-free maintenance did not affect soybean height. The number of pods per plant and seed weight were decreased when there was no control. Sicklepod shoot fresh weight and numbers decreased as the weed-free period increased from 0 weeks through the season. Row spacing had no effect on soybean height or seed size; however, the number of pods per plant was higher in 80- than in 40-cm rows. Row spacing influenced yield in only one trial where 20-cm rows outyielded 40-cm rows. A significant interaction occurred between the weed-free period and row spacing in two trials. Soybeans in 20-cm rows outyielded those in 40- and 80-cm rows when sicklepod was not controlled (i.e., 0 weeks interference-free maintenance).

Influence of Soybean Seed Size on Response to Atrazine

Weed Science ◽  
1970 ◽  
Vol 18 (1) ◽  
pp. 162-164 ◽  
Author(s):  
Robert N. Andersen
Keyword(s):  
Regression Analysis ◽  
Glycine Max ◽  
Seed Size ◽  
Selection Criterion ◽  
Soybean Seed ◽  
Dry Weight ◽  
Large Seed ◽  
Untreated Check ◽  
Initial Selection

In the greenhouse, we examined approximately 2,700 strains of soybeans [Glycine max (L.) Merr.] for response to 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine), a herbicide which inhibits photosynthesis. Duration of survival when grown in soil containing 0.84 kg/ha was the initial selection criterion. Strains thus selected as most tolerant and most susceptible were grown then for 3 to 3 ½ weeks in soil containing 0.45 kg/ha of atrazine. The dry weight of shoots expressed as a percentage of each strain's own untreated check was used to measure the strains' tolerance of atrazine. Tolerance, thus measured, generally increased as seed size increased. Regression analysis indicated that 80% of the variation in response was attributable to variation in seed size. We suggest the possibility of minimizing soybean injury from atrazine (and perhaps other herbicides) by planting large seed.

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