Moisture‐Stress Effects on the Yield Components of Two Soybean Cultivars 1

1979 ◽  
Vol 71 (1) ◽  
pp. 86-90 ◽  
Author(s):  
N. N. Momen ◽  
R. E. Carlson ◽  
R. H. Shaw ◽  
O. Arjmand
Keyword(s):  
Yield Components ◽  
Moisture Stress ◽  
Stress Effects ◽  
Soybean Cultivars

scholarly journals Influence of Moisture Stress on Root Traits and Yield Components of Mungbean Genotypes

2018 ◽  
Vol 7 (12) ◽  
pp. 2867-2877
Author(s):  
Y. Yohan ◽  
P. Sudhakar ◽  
V. Umamahesh ◽  
D. Mohan Reddy ◽  
V. Sumathi
Keyword(s):  
Yield Components ◽  
Root Traits ◽  
Moisture Stress

scholarly journals Planting Density and Soybean (Glycine max L.) Cultivars Effects on Yield Components in the Amazon

2020 ◽  
Vol 8 (3) ◽  
pp. 63
Author(s):  
Priscila Pereira Sacramento ◽  
Letícia Cunha da Hungria ◽  
Jamil Chaar El-Husny ◽  
Luis De Souza Freitas
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Yield Components ◽  
Block Design ◽  
Planting Density ◽  
Maximum Height ◽  
Soybean Cultivars ◽  
Linear Behavior ◽  
Randomized Block Design ◽  
Glycine Max L

The aim of this study was to evaluate the influence of planting density and cultivar of soybean on yield components in the southeast Amazon. The experiment was carried out in an Oxisol, with a randomized block design in a 2 x 4 factorial scheme. The treatments were two soybean cultivars (BRS 9090 RR and BRS 8990 RR) and four planting densities (13, 15, 18 and 20 plants m-1), with three replications. First pod insertion height (IFP), plant height (H), number of pods per plant (NPP), grain yield (Y) and weight of 100 grains (W100) were evaluated. The insertion height of the first pod showed a tendency of increase with the increment of plants per linear meter for cultivar BRS 8990 RR, different of the behavior observed for the cultivar BRS 9090 RR, which only showed difference when the density of 300.000 plants ha-1 was tested. For plant height, among soybean cultivars, there was only difference in D400, with BRS 8990 RR showing a maximum height of 83.3 cm, 21% higher than BRS 9090 RR. When evaluated under D350, BRS 8990 RR showed an increase of 13% in the number of pods compared to BRS 9090 RR. Both cultivars showed linear behavior for the grain yield, increasing according the plant population, with the highest grain yield obtained under the density of 400.000 plants ha-1 (4527.3 kg ha-1). The weight of 100 grains was not influenced by any variation factor.

Yield Components as Indirect Selection Criteria for Late-Planted Soybean Cultivars

2003 ◽  
Vol 95 (2) ◽  
pp. 420-429 ◽  
Author(s):  
J. E. Board ◽  
M. S. Kang ◽  
M. L. Bodrero
Keyword(s):  
Yield Components ◽  
Selection Criteria ◽  
Indirect Selection ◽  
Soybean Cultivars

scholarly journals Light reduction and moisture stress: effects on growth and water relations of western larch seedlings

1985 ◽  
Vol 15 (1) ◽  
pp. 72-77 ◽  
Author(s):  
Nan C. Vance ◽  
Steven W. Running
Keyword(s):  
Stomatal Closure ◽  
Biomass Accumulation ◽  
Dry Weight ◽  
Moisture Stress ◽  
Western Larch ◽  
Light Reduction ◽  
Stress Effects ◽  
Reduced Height ◽  
Terminal Bud ◽  
Nighttime Temperatures

Ten-week-old western larch (Larixoccidentalis Nutt.) seedlings were grown in a greenhouse under 70, 37, and 27% full sunlight from late July to early October. In August, seedlings under each light treatment were repetitively water stressed until predawn leaf water potential (Bψ1) reached one of three levels: no stress (> −0.4 MPa), moderate stress (−0.7 to −1.0 MPa), and severe stress (−1.5 to −1.8 MPa). Moisture stressing significantly reduced height and diameter of seedlings grown under 70% light. Light reduction reduced shoot and root biomass accumulation. A positive linear relation was found between root dry weight and light intensity. The largest seedlings (on a weight basis) received the highest light, were unstressed, and had the lowest shoot/root ratios. Terminal bud set was not affected by light reduction or moisture stressing but occurred under a 14-h photoperiod and reduced nighttime temperatures. Stressed and shaded seedlings had significantly reduced diurnal K1 and stress-cycled seedlings showed an adjustment to stressing. The K1 of unstressed seedlings was correlated with humidity deficit (ABHD), and K1 of stressed seedlings, with Bψ1, and ABHD. Maximum K1 declined with decreasing Bψ1, but not to a level indicating complete stomatal closure.

scholarly journals EFFECT OF SOIL MOISTURE STRESS ON UPTAKE AND RECOVERY OF TAGGED NITROGEN BY WHEAT

1971 ◽  
Vol 51 (1) ◽  
pp. 37-43 ◽  
Author(s):  
E. A. PAUL ◽  
R. J. K. MYERS
Keyword(s):  
Soil Moisture ◽  
Moisture Stress ◽  
Organic Soil ◽  
Soil Mineral ◽  
High Moisture ◽  
Soil Moisture Stress ◽  
Mineral N ◽  
Growing Period ◽  
Stress Effects ◽  
N Utilization

Labelled 15NH4NO3 was used in a growth chamber to study the effect of moisture stress on the utilization of nitrogen by wheat. This made it possible to determine the recovery of nitrogen (N) in the soil-plant system of two Chernozemic soils. Moisture stress effects were less evident in a clay soil than in a loam. Approximately 55% of the N utilized by the growing plants came from organic soil-N mineralized during the growing period. From 59 to 71% of the initial fertilizer plus soil mineral-N was utilized by the plants. Twenty to 36% remained in the soil, and 1 to 17% was lost. Losses were greatest in soils exposed to high moisture stress and were related to the residual NO3-N levels in the soil. They were attributed to denitrification. Immobilization of N was highest at low moisture stress where plant growth was the greatest, but mineralization was unaffected by the moisture stress applied. It was estimated that 5.0 to 6.2 kg N were required to produce 100 kg of wheat, the highest efficiency of N utilization being obtained at low soil moisture stress.

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