Results 21 to 30 of about 5,970,847 (335)

Laser wakefield driven generation of isolated CEP-tunable intense sub-cycle pulses [PDF]

open access: yes, 2020
Sources of intense, ultra-short electromagnetic pulses enable applications such as attosecond pulse generation, control of electron motion in solids and the observation of reaction dynamics at the electronic level.
Olofsson, Christoffer   +2 more
core   +2 more sources

Comparison of Technical and Economical Effect of Different Planters using Varied Seed Rates on Canola Yield in Moghan Region [PDF]

open access: yesJournal of Agricultural Machinery, 2017
Introduction One of the most important agricultural crops is rape seed oil as its special features can play an important role in the agricultural region.
J Taghinazhad
doaj   +1 more source

A study of soil seed banks across one complete chronosequence of secondary succession in a karst landscape [PDF]

open access: yesPeerJ, 2020
Anthropogenic disturbance and distinctive geochemistry have resulted in rocky desertification in many karst regions of the world. Seed banks are crucial to vegetation regeneration in degraded karst ecosystems characterized by a discontinuous distribution
Xiaole He   +4 more
doaj   +2 more sources

Selective Pod Abortion by \u3ci\u3eBaptista Leucantha\u3c/i\u3e (Fabaceae) as Affected by a Curculionid Seed Predator, \u3ci\u3eApion Rostrum\u3c/i\u3e (Coleoptera) [PDF]

open access: yes, 2017
The effect of a seed predator, Apion rostrum (Coleoptera: Curculionidae), on selective pod abortion from Baptisia leucantha (Fabaceae) was investigated in a restored tallgrass prairie plot.
Petersen, Chris E, Sleboda, Jo Ann
core   +2 more sources

Probability Density Function Transformation Using Seeded Localized Averaging

open access: yesIEEE Transactions on Nuclear Science, 2011
Seeded Localized Averaging (SLA) is a spectrum acquisition method that averages pulse-heights in dynamic windows. SLA sharpens peaks in the acquired spectra. This work investigates the transformation of the original probability density function (PDF) in the process of applying the SLA procedure.
Dimitrov, Nedialko B.   +1 more
openaire   +2 more sources

Anthropogenic seed dispersal: rethinking the origins of plant domestication

open access: yes, 2020
It is well documented that ancient sickle harvesting led to tough rachises, but the other seed dispersal properties in crop progenitors are rarely discussed. The first steps toward domestication are evolutionary responses for the recruitment of humans as
Spengler, R.
core   +1 more source

PLANT DENSITY OF SEED PROPAGATED ARTICHOKE (CYNARA SCOLYMUS L.)

open access: yesActa Horticulturae, 2004
Using the earlier seed propagated cultivars treated with gibberellic acid (GA), it is possible to follow a similar (but slightly delayed) cycle of the most frequently used cultivar in Spain, the asexually propagated ‘Blanca de Tudela’. However, the vegetative growth of the treated plants is lower.
Miguel, Alfredo   +6 more
openaire   +3 more sources

Density-Dependent Seed Predation of Quercus wutaishanica by Rodents in Response to Different Seed States

open access: yesAnimals, 2023
The predation and/or dispersal of Quercus seeds by rodents play an important role in the creation of the tree species. The present study examined the effects of community habitats on the predation and dispersal of Quercus wutaishanica seeds by rodents. We released seeds with densities set at 2, 4, 8, 16, and 32 seed square meter with litter cover, soil
Yonghong Luo   +8 more
openaire   +3 more sources

Optimum Planting Date and Seed Amount of Spring Rapeseed in Saline and Marginal Lands around Urmia lake [PDF]

open access: yesJournal of Agricultural Science and Sustainable Production, 2020
Background and objective: The present research was done in order to determine the optimum planting date, seed amount and to evaluate the grain and oil yields of spring rapeseed in saline and marginal areas around Urmia lake.
Bahman Pasban Eslam
doaj  

Comportamento de variedades de arroz de sequeiro em diferentes populações de plantas, com e sem irrigação suplementar Behaviour of upland rice varieties at different plant densities, under and without supplemental irrigation

open access: yesScientia Agricola, 1995
Visando determinar os efeitos do espaçamento entre linhas (30, 40 e 50 cm) e da densidade de semeadura (50, 100 e 150 sementes/m²) sobre o rendimento de grãos e algumas características biométricas de duas variedades de arroz (Oryza sativa L.), com e sem ...
A.B. dos Santos, J.D. Costa
doaj   +1 more source

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