Results 31 to 40 of about 5,322,660 (343)

Effect of environment and maternal plant on seed density and correlation with sugar beet (Beta Vulgaris) germination traits [PDF]

علوم و فناوری بذر ایران, 2022
In this experiment, physical and chemical characteristics of sugar beet seed and its relationship with germination traits was studied. This traits were evaluated on 10 sugar beet singles crosses that obtained from three locations including Ardabil ...
Mohammad Reza Mirzaei, Babak Babaee
doaj   +1 more source

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

Scientia 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

Markedly Divergent Tree Assemblage Responses to Tropical Forest Loss and Fragmentation across a Strong Seasonality Gradient [PDF]

, 2015
We examine the effects of forest fragmentation on the structure and composition of tree assemblages within three seasonal and aseasonal forest types of southern Brazil, including evergreen, Araucaria, and deciduous forests.
AR Ruschel, AT Oliveira-Filho, B Rambo, BA Santos, BMJ Engelbrecht, Carlos A. Peres, CD Inácio, CJ Krebs, D Faria, D Lobo, DE Prado, DH Janzen, Dusan Gomory, E Nimer, EE Santo-Silva, F Michalski, FA Bazzaz, FA Bazzaz, FP Werneck, FPL Melo, FPL Melo, FPL Melo, G Castillo-Campos, G Halffter, Gabriel Mendes, Giehl EL Hettwer, H Behling, H Behling, H Lorenzi, HK Gibbs, HP Veloso, J Chave, J Chave, JA Foley, JB Wilson, JL Waechter, JMC Silva, João A. Jarenkow, KE Stoner, LDS Duarte, LdS Duarte, M Benchimol, M Dufrene, M Quesada, M Sobral, M Tabarelli, M Tabarelli, M Tabarelli, M Tabarelli, MA Oliveira, Marcelo Tabarelli, MB Carlucci, MC Ribeiro, N Myers, NM Holbrook, O Hammer, PG Murphy, R Borchert, RJ Hijmans, Rodrigo L. L. Orihuela, ROJ Bierregaard, S Putz, SC Fontana, SFB Ferraz, SJ Wright, TA Gardner, TC Whitmore, TC Whitmore, van der Pijl, WF Laurance, WF Laurance, WF Laurance, WF Laurance, WF Laurance, WF Laurance, WF Laurance, WF Laurance   +76 more
core   +4 more sources

Ground seed density patterns under conditions of strongly overlapping seed shadows in Abies alba Mill. stands

European Journal of Forest Research, 2011
In three subsequent years, seeds were collected from 66 to 75 seed traps in three Abies alba stands that differed in vertical structure and the number of potentially reproducing trees.
J. Paluch
semanticscholar   +1 more source

Rapid assessment of rice seed availability for wildlife in harvested fields

Wildlife Society Bulletin, 2011
Rice seed remaining in commercial fields after harvest (waste rice) is a critical food resource for wintering waterfowl in rice‐growing regions of North America.
Brian J. Halstead, Michael R. Miller, Michael L. Casazza, Peter S. Coates, Melissa A. Farinha, K. Benjamin Gustafson, Julie L. Yee, Joseph P. Fleskes   +7 more
doaj   +1 more source

Quantifying the radiation belt seed population in the 17 March 2013 electron acceleration event [PDF]

, 2014
We present phase space density (PSD) observations using data from the Magnetic Electron Ion Spectrometer instrument on the Van Allen Probes for the 17 March 2013 electron acceleration event.
Baker, D. N., Blake, J. B., Boyd, A. J., Claudepierre, S., Fennell, Joseph F., Reeves, Geoffrey, Spence, Harlan E., Turner, D. L.   +7 more
core   +2 more sources

Effects of Seed Size and Cache Density on the Seed Fate of Quercus wutaishanica Mediated by Rodents

Life
Animal-mediated seed dispersal is very important for plant population regeneration and the stability of forest ecosystems. Seed size and cache density are important factors for seed dispersal, but we still know little about seed size selection at ...
Jiming Cheng, Min Zhang, Xingfu Yan
doaj   +1 more source

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

Journal 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  

Primordial Magnetic Fields from Dark Energy [PDF]

, 2001
Evidences indicate that the dark energy constitutes about two thirds of the critical density of the universe. If the dark energy is an evolving pseudo scalar field that couples to electromagnetism, a cosmic magnetic seed field can be produced via ...
Amendola, Armendariz-Picon, Baccigalupi, Baccigalupi, Balbi, Bond, Boyanovsky, Boyle, Brax, Carroll, Chiba, Coble, Corasaniti, Cormier, Da-Shin Lee, Dodelson, Doran, Frieman, Frieman, Giovannini, Grasso, Huterer, Kin-Wang Ng, Kronberg, Kulsrud, Lee, Olinto, Pavlov, Peccei, Raffelt, Riess, Roukema, Roukema, Skordis, Turner, Turner, Waga, Wang, Weller, Wolung Lee   +39 more
core   +2 more sources

Seeding density in wheat: the more, the merrier? [PDF]

Scientia Agricola, 2013
Adjustment of seeding schemes is one of the crop management techniques that most influences grain yield components. This work aimed to characterize the potential grain yield and its components in wheat (Triticum aestivum L.) genotypes with contrasting tillering ability under different seeding densities and environments.
Valério, Igor Pirez, Carvalho, Fernando Irajá Félix de, Benin, Giovani, Silveira, Gustavo da, Silva, José Antonio Gonzalez da, Nornberg, Rafael, Hagemann, Thais, Luche, Henrique de Souza, Oliveira, Antônio Costa de   +8 more
openaire   +5 more sources