Some effects of self-, cross-, and open-pollinations in Picea pungens

1984 ◽  
Vol 62 (2) ◽  
pp. 392-395 ◽  
Author(s):  
W. H. Cram
Keyword(s):  
Picea Pungens ◽  
Seed Yields

Self-fertility of Picea pungens Engelm. ranged from 0 to 176 seeds per cone for 72 trees. Self-pollinations reduced the average seed yields to 40 and 23% of the respective cross-, and open(wind)-pollinations. Selfing decreased the germination for nonstratified seed to 71% of that for cross-pollinated seed, whereas the germination of stratified selfed and crossed seed varied from 80 to 100%. Selfing also depressed the growth of 1- to 5-year-old seedlings.

THE SUCCESS OF THE LUCERNE MESSAGE IN MARLBOROUGH

1981 ◽  
pp. 179-183
Author(s):  
A.J. Cresswell
Keyword(s):  
North America ◽  
Weed Control ◽  
Seed Yield ◽  
Insect Pest ◽  
Fold Increase ◽  
Plant Spacing ◽  
Insect Pest Control ◽  
One Year ◽  
Seed Yields ◽  
New Cultivars

This paper, as well as being a testimonial to the benefit the writer has received from the Grassland Association, shows how the knowledge of scientists has been used to increase lucerne seed yields by methods of growing resistant cultivars especially for seed production as opposed to growing for hay, silage or grazing. It shows how new cultivars can be multiplied quickly by growing two crops in one year, one in each hemisphere, by using low seeding rates, wide plant spacing and very good weed control. Increased flowering of the crop has been achieved by the use of boron and the choice of time of closing; better pollination has been achieved by the use of more efficient bees - two varieties of which have been imported from North America. Weed and insect pest control and the use of a desiccant at harvest are contributing to a four-fold increase in seed yield, which should double again soon,

Effects of Nitrogen Fertilization and Rate and Method of Seeding on Grass Seed Yields in Pennsylvania 1

1955 ◽  
Vol 47 (12) ◽  
pp. 559-563 ◽  
Author(s):  
Roderic E. Duller ◽  
J. S. Bubar ◽  
H. R. Fortmann ◽  
H. L. Carnahan
Keyword(s):  
Nitrogen Fertilization ◽  
Grass Seed ◽  
Seed Yields

Alfalfa Seed Yields from Seeded Rows vs. Spaced Transplants 1

Crop Science ◽  
1976 ◽  
Vol 16 (2) ◽  
pp. 268-270 ◽  
Author(s):  
Clarence M. Rincker
Keyword(s):  
Alfalfa Seed ◽  
Seed Yields

Comparative Fertility and Seed Yields of Parental Bermudagrass Clones and their Singlecross F 1 and F 2 Populations 1

Crop Science ◽  
1983 ◽  
Vol 23 (6) ◽  
pp. 1133-1135 ◽  
Author(s):  
M. P. Kenna ◽  
C. M. Taliaferro ◽  
W. L. Richardson
Keyword(s):  
Seed Yields

Seed Yields from Breeder and Foundation Seed of Eight Alfalfa Cultivars 1

Crop Science ◽  
1983 ◽  
Vol 23 (2) ◽  
pp. 256-258 ◽  
Author(s):  
W. R. Kehr ◽  
D. K. Barnes ◽  
D. E. Brown ◽  
J. H. Elgin ◽  
E. L. Sorensen
Keyword(s):  
Foundation Seed ◽  
Seed Yields

scholarly journals Characterization and Evaluation of Salvia hispanica L. and Salvia columbariae Benth. Varieties for Their Cultivation in Southwestern Germany

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2012
Author(s):  
Samantha Jo Grimes ◽  
Filippo Capezzone ◽  
Peteh Mehdi Nkebiwe ◽  
Simone Graeff-Hönninger
Keyword(s):  
Seed Mass ◽  
Point Of View ◽  
Raw Material ◽  
Salvia Hispanica ◽  
Environmentally Sustainable ◽  
Chia Seed ◽  
Increasing Demand ◽  
Salvia Hispanica L ◽  
Reported Data ◽  
Seed Yields

Rising consumer attraction towards superfoods and the steadily increasing demand for healthy, environmentally sustainable, and regionally produced food products has sharpened the demand for chia. Over the course of 4 years, two early flowering chia varieties belonging to Salvia hispanica L., and Salvia columbariae Benth. Species were identified to complete their phenological development and, therefore, able to reach maturity under a photoperiod >12 h, thus enabling the cultivation of chia in central Europe—more specifically, in southwestern Germany—consistently for the first time. Results obtained by the conducted field trial in 2018 showed that chia seed yields and thousand-seed mass ranged from 284.13 to 643.99 kg ha−1 and 0.92 to 1.36 g, respectively. Further, the statistical analyses showed that the protein content of the cultivated chia varieties ranged from 22.14 to 27.78%, the mucilage content varied from 10.35 to 20.66%, and the crude oil content amounted up to 28.00 and 31.73%. Fatty acid profiles were similar to previously reported data with α-Linolenic acid being the most prominent one, ranging from 60.40 to 65.87%, and we obtained ω6:ω3 ratios between 0.2 and 0.3. In conclusion, chia could represent a promising raw material from a nutritional point of view, while being able to diversify the local food basis of southwestern Germany.

Increase Longleaf Pine Seed Yields by Inhibiting Conelet Abortion

1987 ◽  
Vol 11 (1) ◽  
pp. 6-9 ◽  
Author(s):  
Robert C. Hare
Keyword(s):  
Boric Acid ◽  
Seed Production ◽  
Seed Yield ◽  
Longleaf Pine ◽  
Foliar Spray ◽  
Seed Yields

Abstract A single foliar spray with either antiethylene compounds or cytokinins shortly after anthesis reduced conelet abortion by half and doubled seed production. Spraying with boric acid plus Cytex® , a relatively economical form of cytokinin derived from seaweed, was equally effective,and addition of certain antiethylene compounds further improved seed yield. South. J. Appl. For. 11(1):6-9.

scholarly journals Activated Yeast Extract Enhances Growth, Anatomical Structure, and Productivity of Lupinus termis L. Plants under Actual Salinity Conditions

Agronomy ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 74
Author(s):  
Ragab S. Taha ◽  
Mahmoud F. Seleiman ◽  
Bushra Ahmed Alhammad ◽  
Jawaher Alkahtani ◽  
Mona S. Alwahibi ◽  
...  
Keyword(s):  
Salinity Stress ◽  
Yeast Extract ◽  
Field Experiments ◽  
Soluble Sugars ◽  
Substantial Improvement ◽  
Vital Role ◽  
Anatomical Structure ◽  
Saline Stress ◽  
Total Soluble Sugars ◽  
Seed Yields

Salinity is one of the most severe environmental stresses that negatively limits anatomical structure, growth and the physiological and productivity traits of field crops. The productivity of lupine plants is severely restricted by abiotic stress, particularly, salinity in arid and semiarid regions. Activated yeast extract (AYE) can perform a vital role in the tolerance of environmental stress, as it contains phytohormones and amino acids. Thus, field experiments were conducted to explore the potential function of active yeast extract (0, 50, 75, and 100 mL AYE L−1) in mitigating the harmful impacts of salinity stress (EC = 7.65 dS m−1) on anatomical structure, growth, and the physiological and productivity traits of two lupine cultivars: Giza 1 and Giza 2. The different AYE treatments resulted in a substantial improvement in studied attributes, for example the growth, anatomical, physiological characteristics, and seed yields of treated lupine cultivars compared with untreated plants. Among the AYE doses, 75 mL L−1 significantly improved plant growth, leaf photosynthetic pigments, total soluble sugars, total protein, and seed yields, and exposed the best anatomical attributes of the two lupine cultivars grown under saline stress. The exogenous application of 75 mL AYE L−1 was the most influential, and it surpassed the control results by 45.9% for 100-seed weight and 26.9% for seed yield per hectare. On the other hand, at a concentration of 75 mL L−1 AYE there was a decrease in the alkaloids and endogenous proline under the studied salinity stress conditions. Promoted salinity stress tolerance through sufficient AYE dose is a hopeful strategy to enhance the tolerance and improve productivity of lupine into salinity stress. Furthermore, the response of lupine to salinity stress appears to rely on AYE dose. The results proved that Giza 2 was more responsive to AYE than Giza 1, showing a better growth and higher yield, and reflecting further salinity tolerance than the Giza 1 cultivar.

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