Seed Production Practices

Pedersen, M. W.; Bohart, George E.; Marble, V. L.; Klostermeyer, E. C.

doi:10.2134/agronmonogr15.c32

Cited by 4 publications

(4 citation statements)

References 56 publications

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“…Taylor and Marble (1986) showed that seed yield is positively correlated with number of stems, number of racemes and number of pods per raceme. Pederson et al (1972) mentioned that 1000-seed weight is significantly reduced with water stress, compared with excessive irrigation, whereas seed yield was reduced by about 13% at the water stress condition (21 days interval).…”

Section: Resultsmentioning

confidence: 99%

Effect of Water Stress and Cutting Frequency on Alfalfa (Medicago sativa L.) Seed Production*

Ahmed¹,

Ahmed²

2023

uofkjas

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A split-plot experiment was conducted at the DemonstrationFarm of the Faculty of Agriculture, University of Khartoum, during theperiod January 1999 - June 2000 to study the effect of water stress andcutting frequency on seed production of alfalfa (Medicago sativa L.).Three irrigation intervals (7, 14 and 21 days) were assigned to the mainplots and designated I1 , I2 and I3 , respectively, and three cuttingfrequencies; namely, 21, 28 and 35 days were assigned to the subplots andgiven the symbols C 1 , C 2 and C 3 , respectively. Data were collected onnumber of racemes per plant, number of pods per raceme, number ofseeds per pod, 1000-seed weight and final seed yield. Correlation analyseswere carried out between yield and some of its components. The resultsrevealed that shorter irrigation intervals (7 and 14 days) were significantlybetter than the longer interval (21 days), and the 35 days cuttingfrequency was the best for seed yield. Neither the number of seeds perpod nor the 1000-seed weight were affected by the cutting intervals.However, the former was significantly affected by irrigation intervals.Mean seed yield for the irrigation intervals was 77.9, 86.2 and 41,4 kg/hafor I1 , I2 and I3 , respectively. On the other hand, cutting frequenciesresulted in seed yields of 38.1, 78,2 and 89.2 kg/ha for C 1 , C2 and C3 ,respectively. Correlation analyses showed that seed yield was highlycorrelated with 1000-seed weight and number of seeds per pod.

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Section: Resultsmentioning

confidence: 99%

Effect of Water Stress and Cutting Frequency on Alfalfa (Medicago sativa L.) Seed Production*

Ahmed¹,

Ahmed²

2023

uofkjas

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“…Row spacing of alfalfa varies from 75 to 100 cm. On the other hand seed rate varies between 5 and 10 kg ha -1 [3]. Seed rate and row spacing of vetch and change from 50 to 60 cm and between 60 and 80 kg ha -1 respectively [11].…”

Section: Cultural Practicesmentioning

confidence: 99%

“…At the same time maturing legume forage crops can be harvested with combine machine. If pods are dry, but stems are still green, chemical desiccant and defoliant should be used before harvesting [3,14]. Harvesting should be made in early in the morning.…”

Section: Mechanizationmentioning

confidence: 99%

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Possibilities Forage Legume Seed Production in Turkey

Ton¹,

Anlarsal²

2017

ujar

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There are suitable ecological regions of Turkey for seed production of legume forage crops. At the stage of flowering and seed maturation low humidity and high temperature can cause to reduction in seed yield. Ecological conditions of Central and Southern Anatolia are very favorable for seed production in legume forage crops. Alfalfa, common vetch, sainfoin are most important among the forage crops cultivated in Turkey. Some cultivars belonging to above the mentioned species have been developed in Turkey. High-quality seed is essential for good field stands. Seed crops should be produced taking into consideration with seed production rules. Control of seed quality in seed production must conform to statutes of National Certification Standard. High yields of good quality seed are obtained under good management such as sowing time and rate, irrigation, fertilizer, weed control, storage conditions isolation distance and certification rules.

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Decadal trends in the pollinator assemblage of Eucryphia cordifolia in Chilean rainforests

et al. 2014

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Long-term studies of plant-pollinator interactions are almost nonexistent in the scientific literature. The objective of the present study was to determine changes and trends in the pollinator assemblage of ulmo (Eucryphia cordifolia; Cunoniaceae), a canopy-emergent tree found in Chilean temperate rainforests. We assessed the temporal variability of the pollinator assemblage and identified possible modulators of the observed temporal shifts. We sampled insect visitors to the flowers of 16 individual trees of E. cordifolia during 10 consecutive flowering seasons (2000-2009), recording a total of 137 pollinator species with a mean number of species per year of 44. Only three pollinator species (2.2%) were recorded every year. Two bee species accounted for 50% of all insect visits to flowers. One bee species, Bombus dahlbomii (native), was dominant in one season, whereas Apis mellifera (exotic) dominated during the next season. These interannual shifts in population abundances presented first-order dynamics that were characterized by oscillations with a period of 2 years. Changes in the abundances of the dominant pollinators, as well as differences in temperature and precipitation during insect emergence and flowering, led to a nested temporal structure of pollinator composition. Furthermore, the abundances of less common pollinators were sensitive to the abundance of the dominant bee species and to monthly maximum temperatures and the average precipitation during spring and summer. Based on our results and those from other studies, we predict a decline in the numbers of Bombus dahlbomii and nondominant native pollinators in response to new exotic arrivals.

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Seed Production Practices

Cited by 4 publications

References 56 publications

Effect of Water Stress and Cutting Frequency on Alfalfa (Medicago sativa L.) Seed Production*

Effect of Water Stress and Cutting Frequency on Alfalfa (Medicago sativa L.) Seed Production*

Possibilities Forage Legume Seed Production in Turkey

Decadal trends in the pollinator assemblage of Eucryphia cordifolia in Chilean rainforests

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