Consulta: subjectFacets:"Plant population"
Registros recuperados: 29
Data/hora: 16/06/2024 06:46:25

Drought resistance of sugar-cane crop for different levels of water availability in the soil
Provedor de dados: 70
Autores: Barbosa,Fernando da S.; Coelho,Rubens D.; Maschio,Rafael; Lima,Carlos J. G. de S.; Silva,Everaldo M. da.
Soil water availability is the main cause of reduced productivity, and the early development period most sensitive to water deficit. This study aimed to evaluate the drought resistance of the varieties of sugar-cane RB867515 and SP81-3250 during the early development using different levels of water deficit on four soil depths. The experiment was conducted at the Department of Biosystems at Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ/USP) in a greenhouse in soil classified as Oxisol, sandy loam texture (Series "Sertãozinho"). Once exhausted the level of available water in the soil, the dry strength of the studied strains are relatively low. Water balance with values less than -13 mm cause a significant decrease in the final population of plants,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Irrigation; Plant population; Saccharum spp.; Drought tolerance.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000200002

PRODUCTIVITY OF CORN HYBRIDS IN RELATION TO SOWING OVERLAP
Provedor de dados: 70
Autores: Farias,Marcelo S. de; Dagios,Ravel F.; Santi,Antônio L.; Cherubin,Maurício R.
ABSTRACT The automatic control of section shut-off in seed drills minimizes seeding overlap and can reduce productivity losses, especially in responsive crops such as corn. In that context, this study evaluated the effect of sowing overlap on the grain yield and productivity of three corn hybrids. A DB-50 precision seed drill, with 33 rows equipped with a 16-row automatic section control, was used in this experiment. A randomized block design was applied to test three corn hybrids under two sowing conditions (without sowing overlap - WOSO; and with sowing overlap - WSO), with four replications. The analyzed variables were the number of plants per hectare, the number of cobs per hectare, cob length, the number of grains per cob, the thousand grain weight,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Precision agriculture; Section control; Plant population.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400489

Ecologia populacional de especies arboreas na estacao ecologica do Panga (Uberlandia-MG).
Provedor de dados: 14
Autores: AQUINO, F. de G.; OLIVEIRA, M. C. de; RIBEIRO, J. F.; SCHIAVINI, I.
bitstream/CPAC-2009/24594/1/bolpd_26.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: ECFLOR100; Acacia glomerosa; Uberlandia; Minas Gerais; Brasil; Species; Plant population; Growth.; Anadenanthera Macrocarpa; Biodiversidade; Árvore; Crescimento; Cerrado; Ecologia Vegetal; Dinâmica Populacional; Espécie; Mortalidade; População de Planta.; Brazil; Biodiversity; Plant ecology; Population dynamics; Mortality; Trees.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/548581

Comportamento do arroz de sequeiro em diferentes populações de plantas.
Provedor de dados: 14
Autores: AZEVEDO, D. M. P. de; MENDES, A. M.; COSTA, N. de L.
Procurou-se verificar a influencia de diferentes espacamentos entre linhas e densidades de semeadura sobre a produtividade da cultivar de arroz Progresso, sob as condicoes do cerrado de Rondonia, em regime de sequeiro e o efeito dos tratamentos sobre os indices de infestacao da Diatraea saccharalis sobre a cultura. Concluiu-se que: Rendimentos de graos foram diretamente proporcionais as densidades de semeadura; Espacamentos nao influenciaram no rendimento da cultura, contudo, observou-se uma tendencia de maiores produtividades com a utilizacao de menores espacamentos; Ocorrencia de D. saccharalis nao foi afetada pelos espacamentos e densidades de semeadura avaliados, no entanto, observou-se uma tendencia de maior incidencia com a utilizacao de menores...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Plant population; Sugarcane borer; Embrapa Rondônia; Vilhena (RO); Rondônia; Amazônia Ocidental; Western Amazon.; Arroz Sequeiro; Oryza Sativa; População de Planta; Diatraea Saccharalis; Campo Experimental.; Broca; Praga de Planta; Cerrado; Rendimento; Características Agronômicas; Condição Ambiental; Aclimatação; Comportamento de Variedade; Rice; Plant pests.; Agronomic traits; Crop yield; Cerrado soils; Dryland farming; Variety trials; Acclimation; Environmental factors.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/699910

População de plantas de soja no sistema plantio direto, na região de Dourados-MS.
Provedor de dados: 14
Autores: SILVA, C. M. da.
bitstream/item/39600/1/COT39-98.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Populacao de plantas; Mato Graosso do Sul; Dourados; Brasil; Soybean; Plant population; Direct sowing.; Cerrado; Glycine Max; Plantio Direto; Soja.; Brazil.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/241134

Ocorrência de populações naturais de espécies não-madeireiras em Rondônia.
Provedor de dados: 14
Autores: BENTES-GAMA, M. de M.; VIEIRA, A. H.; LIMA, L. F.; OLIVEIRA, A. C. de; SILVA, A. P. F. F. da.
Os objetivos deste trabalho foram identificar e caracterizar, a partir de informação secundária, áreas de ocorrência natural de espécies florestais fontes de produtos florestais não madeireiros, entre elas: castanha-do-brasil (Bertholletia excelsa H.B.K); copaíba (Copaifera spp.) e babaçu (Orbygnia martiana) no Estado de Rondônia, como base para a ampliação de estudos de manejo e conservação dessas espécies.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Plant population; Produto florestal não madeireiro (PFNM); Rondônia; Amazônia Ocidental; Western Amazon.; Recurso Florestal; Biogeografia.; População de Planta; Forest resources; Nontimber forest products; Biogeography.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/709084

Increasing groundnut yield on dryland Alfisols in Indonesia
Provedor de dados: 30
Autores: Abdullah Taufiq.
Palavras-chave: Harrows; Groundnuts; Sowing rates; Control methods; Arid zones; Plant population; On-farm research; Fungi; Tillage equipment; Wet season.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3346

Effect of dates of planting, plant geometry and number of seedlings on growth and yield of hybrid rice (Oryza sativa L.)
Provedor de dados: 30
Autores: V.K.
Palavras-chave: Hybrids; Grain; Heterosis; Planting date; Dry matter; Spacing; Yields; Field experimentation; Plant population; Leaf area index.
Ano: 2008
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4676

Potato crop growth as affected by nitrogen and plant density
Provedor de dados: 86
Autores: OLIVEIRA,CARLOS ALBERTO DA SILVA.
Growth and development variables and dry matter characteristics were studied for cultivar Snowden of potato (Solanum tuberosum L.) to evaluate nitrogen and plant density influence. Disregarding ending of season plant stress, the average number of actives haulms per plant was five and it was not affected by plant spacing. However, seasonal and final number of active haulms per plant were increased at 200 kg/ha of nitrogen. Maximum stem elongation was reached quickly with double density and had the tendency to keep constant at the highest and lowest nitrogen levels after 70 days after planting. Specific stem mass defined as mass per unit stem length was established as an indirect measure of stem thickness and load capacity. Specific leaf mass position in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Snowden cultivar; Plant nutrition; Canopy; Leaf area; Tubers; Stems; Dry matter; Plant population.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000500011

Weed Diversity in Corn with Different Plant Arrangement Patterns Grown Alone and Intercropped with Palisade Grass
Provedor de dados: 87
Autores: MELO,T.S.; MAKINO,P.A.; CECCON,G.
ABSTRACT: Composition and level of weed infestation interfere with crop yield and increase production costs. This study aimed to identify weed composition and infestation in corn grown with different plant populations, single, and intercropped with palisade grass. The phytosociological method was used to evaluate density, frequency, dominance, and infestation level of weeds in single and intercropped corn, a with conventional (0.90 m) and reduced (0.45 m) spacing, and low and high plant population in Dourados, MS, Brazil. Commelina benghalensis, Echinochloaspp., and Euphorbia heterophylla were the species most found in the treatments. Single corn with higher plant population decreased weed occurrence. Treatments with palisade grass under a reduced spacing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Urochloa; Plant population; Phytosociology; Diversity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100199

Sowing operation direction and population densities in corn growing
Provedor de dados: 91
Autores: Corrêa,Rafael D. G.; Furlani,Carlos E. A.; Zerbato,Cristiano; Oliveira,Danilo T. de; Noronha,Rafael H. de F.; Warikoda,Newton K.
ABSTRACT Among the factors that may influence corn yield are sowing operation direction and plant population, since they alter the shade index between crop rows, and consequently the efficiency of interception of the photosynthetically active radiation by the leaves of plants. The aim of this study was to evaluate the influence of sowing direction and plant populations on P2830VYH hybrid corn yield. The experiment was conducted at the facilities of FCAV-UNESP, latitude 21º 14’ S and longitude 48º 16’ W in Jaboticabal (SP). The treatments were composed of three sowing directions (North-South, Northeast-Southwest, and East-West) and three population densities (40,000, 60,000 and 80,000 plants ha-1). The treatment with 80,000 plants ha-1 had the lowest cost...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Sowing configuration; Plant population; Grain yield.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300183

RELATIONSHIP BETWEEN RADICAL INFESTATION OF Hylastinus obscurus (MARSHAM) AND THE YIELD OF CULTIVARS AND EXPERIMENTAL LINES OF RED CLOVER (Trifolium pratense L.)
Provedor de dados: 127
Autores: Alarcón,Daniela; Ortega,Fernando; Perich,Fernando; Fernando,Pardo; Parra,Leonardo; Quiroz,Andrés.
Red clover (Trifolium pratense L.) is a valuable forage legume grown alone or in mixture with grasses in temperate regions of the world. Red clover is adapted to a wide range of soil types, pH levels, environmental and management conditions. However, the main limitation of this species is the lack of persistence related to the high mortality of plants. In Chile the main biotic factor affecting survival of plants is the root borer Hylastinus obscurus (Marsham) (Coleóptera; Scolytidae). In 1989, a red clover (T. pratense L.) breeding program was started at Carillanca Research Center of the Institute of Agricultural Research (INIA), Chile, with the main objectives of improving the survival of plants, forage yield and persistence. In 2002 a research line to...
Tipo: Journal article
Palavras-chave: Hylastinus obscurus; Red clover; Plant population; Breeding; Dry matter yield.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000200003

Soil fertility studies of corn and sorghum : V. Effect of plant population and nitrogen fertilization on the yield of rainfed sorghum
Provedor de dados: 106
3 tables
Palavras-chave: Sorghum; Plant population; Nitrogenfertilizers; Yields; ข้าวฟ่าง; ปุ๋ยไนโตรเจน; ระยะปลูก; ผลผลิต.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4657

Corn production research in 1990
Provedor de dados: 106
Autores: Supot Faungfupong; Juangjun Duangpatra; Surapol Chowchong; Rachain Thiraporn; Gunching Siriwitayawan; Kingkarm Kongjuntuk.
4 tables
Palavras-chave: Corn; Maize; Sweet corn; Yields; Production; Seeding rates; Plant population; Seed vigor; Yield component; ข้าวโพด; ข้าวโพดหวาน; การผลิต; ความหนาแน่น; ความแข็งแรงของเมล็ด; องค์ประกอบผลผลิต.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4321

Progress report on applied experiments
Provedor de dados: 106
Autores: Sakamoto, Haruhiko; Somrak Noradechanon.
7 ill., 9 tables
Palavras-chave: Corn; Maize; Sorghum; Intensive irrigation; Seed storage; Seed germination; Fertilizers; Plant population; Varieties; Crop rotation; Reddish brown lateritic; Yields; Agronomic characters; ข้าวโพด; ข้าวฟ่าง; การให้น้ำ; การทดสอบผลผลิต; การผลิต.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4112

การศึกษาเพื่อพัฒนาการผลิตเมล็ดพันธุ์ข้าวโพดหวานลูกผสมเดี่ยวอินทรี 2 โดยการเพิ่มประชากรและวิธีการใส่ปุ๋ย
Provedor de dados: 106
Autores: Supranee Ngamprasitthi; Thomya Thongluang; Thamrongsilpa Pothisoong; Sukum Chotechuangmanirat; Surapol Chowchong; Anna Saimaneerat; Kosol Kirdpoksub.
6 tables
Palavras-chave: Corn; Maize; Seed production; Hybrids; Insee 2; Plant population; Fertilizer application; ข้าวโพด; ข้าวโพดหวาน; ลูกผสม; การผลิตเมล็ดพันธุ์; การใส่ปุ๋ย; การเพิ่มประชากร.
Ano: 2003
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4557

Crop production and soil management practices for improving yield of corn
Provedor de dados: 106
Autores: Owaht Jootanon; Supot Faungfupong; Rachain Thiraporn.
18 tables
Palavras-chave: Corn; Maize; Varieties; Plant population; Thinning; Weed control; Tassel removal; Leaf angle; Plant densities; Crop production; Soil management practices; ข้าวโพด; การผลิต; การจัดการดิน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3759

Study on the response of DMR corn varieties to different plant population and levels of soil fertility
Provedor de dados: 106
Autores: Nipon Iamsupasit; Narongsak Senanarong; Ampol Senanarong; Jansamoot Sarakul.
4 tables
Palavras-chave: Corn; Maize; Varieties; Downy mildew; Plant population; Soil fertility; Npk fertilizers; Yields; ข้าวโพด; โรคราน้ำค้าง; ประชากรพืช; ความอุดมสมบูรณ์ของดิน.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3829

Integrated research program on soil and fertilizer requirement for increasing yields of corn and sorghum
Provedor de dados: 106
Autores: Amnat Suwanarit; Aschan Sukthumrong; Jongruk Chanchareonsook; Chairerk Suwannarat; Sukum Chotechuangmanirat.
10 ill., 2 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizers; Ammonium fertilizers; Rock phosphate; Nitrogen fertilizers; Spacing; Plant population; Nutrient uptake; Yields; ข้าวโพด; ข้าวฟ่าง; การใส่ปุ๋ย; ความอุดมสมบูรณ์ของดิน; การเพาะปลูก; การจัดการดิน.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4021

Vegetable corn experiment
Provedor de dados: 106
Autores: Tip Lekagul.
2 tables
Palavras-chave: Corn; Maize; Vegetable corn; Sweet corn; Spacing; Yields; Agronomic characters; Plant population; ข้าวโพด; ข้าวโพดหวาน; ข้าวโพดข้าวเหนียว; ความหนาแน่นของประชากร; การใส่ปุ๋ย.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3925

Results of the coordinated agronomic trials in India
Provedor de dados: 106
Autores: Singh, Joginder.
2 ill., 9 tables
Palavras-chave: Corn; Maize; Npk fertilizers; Plant population; Agronomic trials; Yields; India; ข้าวโพด; อินเดีย; ลักษณะทางการเกษตร.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3735

Influence of production and cultural practices on grain yields of  corn and sorghum
Provedor de dados: 106
Autores: Jansamoot Sarakul; Nipon Iamsupasit.
5 tables
Palavras-chave: Corn; Maize; Sorghum; Cultural practices; Production; Planting methods; Downy mildew; Varieties; Plant population; Planting methods; Irrigation timing; Yields; ข้าวโพด; ข้าวฟ่าง; การเพาะปลูก; การให้ผลผลิต; โรคราน้ำค้าง; ความหนาแน่นของประชากร; การใส่ปุ๋ย.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3924

Effect of different plant populations and combinations of N P K on the grain yield of improved maize under late sown condition in the Kathmandu valley, Nepal
Provedor de dados: 106
Autores: Deo, G.P.
1 ill., 4 tables
Palavras-chave: Corn; Maize; Plant population; NPK fertilizers; Grain yield; Yields; Late sown condition; Nepal; Kathmandu valley; ข้าวโพด; ประชากร; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสฟอรัส; ปุ๋ยโปแตสเซียม; ผลผลิต; เนปาล; การปลูกปลายฤดู.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3888

Cultural practice studies in corn and sorghum during 1976
Provedor de dados: 106
Autores: Supot Faungfupong; Wasana Wongyai; Kittima Montranon; Surapol Chowchong.
17 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Direction of planting; Nitrogen fertilizers; Nitrate reductase; Plant population; Tannin; Yields; ข้าวโพด; ข้าวฟ่าง; ประชากรพืช; แทนนิน; ปริมาณ; เอนไซม์; ไนเตรตรีดัคเตส; ทิศทางการปลูก; การเพาะปลูก.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3853

On-farm research on corn during 1977
Provedor de dados: 106
Autores: Supot Faungfupong; Mongkol Yolprasarn.
26 tables
Palavras-chave: Corn; Maize; On farm research; Variety trials; Regional trials; Herbicides; Plant population; Fertilizers; Weed control; Seed quality; Plant densities; Yields; ข้าวโพด; การทดสอบพันธุ์; ความหนาแน่นของประชากร; การใส่ปุ๋ย; การควบคุมวัชพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3939

Influence of high planting densities and arrangements on yield and fruit development of Musa AAA Simmonds
Provedor de dados: 109
Autores: Barrera-Violet,José Luis; Cartagena-Valenzuela,José Régulo; Nanclares-Gómez,Omar Alonso.
Abstract Banana is one of the most abundantly consumed fruits in the world for its contribution to human nutrition, including an important content of potassium. Given the social contribution of this crop in the cropping areas of Colombia, it is necessary to develop agronomic management strategies that contribute to increasing productivity and offering alternatives that regulate the effects of climate seasonality on banana production in the Uraba region of Colombia. For this purpose, different planting densities (2,000, 2,500, 3,000 and 3,500 plants ha-1) and planting arrangements (triangle, rectangle and double furrow), plus a relative control (1,700 plants ha-1 under triangle arrangement), were evaluated in the banana cv. Williams. The experimental design...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Banana; Light interception; Plant competition; Plant population; Bunch quality.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000100046

Número de fileiras no canteiro e espaçamento entre plantas na produção e na rentabilidade da beterraba em Dourados-MS - DOI: 10.4025/actasciagron.v30i3.3550
Provedor de dados: 1
Autores: Zárate, Néstor Antonio Heredia; UFGD; Vieira, Maria do Carmo; UFGD; Rech, Jerusa; UFGD; Graciano, João Dimas; UFGD; Gomes, Hellen Elaine; UFGD; Pontim, Bruno Cezar Álvaro; UFGD.
O trabalho teve como objetivo conhecer a produtividade, a renda bruta e a renda bruta menos o custo das sementes da beterraba ‘Tall Top Early Wonder’, em resposta ao uso de quatro e cinco fileiras no canteiro e dos espaçamentos de 5,0; 7,5 e 10,0 cm entre plantas. A colheita foi realizada aos 116 dias após a semeadura, quando se avaliaram a altura das plantas, a massa fresca das folhas, o diâmetro e o comprimento das raízes e as massas frescas de raízes comerciais e não- comerciais. A validação do trabalho foi realizada pela determinação das rendas bruta e da rendas bruta menos o custo das sementes obtidas por hectare cultivado. Nenhuma das características avaliadas foi influenciada significativamente pela interação número de fileiras no canteiro e...
Palavras-chave: 5.01.00.00-9 Agronomia Beta vulgaris L.; População de plantas; Renda 5.01.03.00-8 Fitotecnia Beta vulgaris L.; Plant population; Income.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3550

Effects of row spacing and nitrogen topdressing fertilization on the yield of upland rice in a no-tillage system
Provedor de dados: 1
Autores: Lacerda, Mábio Chrisley; Nascente, Adriano Stephan.
This study aimed to evaluate the effect of row spacing and nitrogen topdressing fertilization of two materials (genotype 07SEQCL441 CL and cultivar BRS Esmeralda) on the plant height, yield components, grain yield, and quality of an upland rice crop grown in a no-tillage system. Trials were conducted for two growing seasons under field conditions in a 3 x 4 factorial, randomized, complete block design, with four replications. For each material, treatments consisted of the combination of row spacing (0.225, 0.35, and 0.45 m) with nitrogen (N) applied as topdressing (0, 50, 100, and 150 kg ha-1). The lowest row spacing (0.225 m) for genotypes 07SEQCL441 CL and BRS Esmeralda provided a higher number of tillers, number of panicles m-2, and grain yield of rice....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomia; Fitotecnia; Cultivares Oryza sativa L.; Nitrogen; Plant population; NTS; Cerrado fitotecnia.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30855

UNDERSTANDING PLANT DENSITY EFFECTS ON MAIZE GROWTH AND DEVELOPMENT: AN IMPORTANT ISSUE TO MAXIMIZE GRAIN YIELD
Provedor de dados: 65
Autores: Sangoi,Luís.
Maize is the agronomic grass species that is most sensitive to variations in plant density. For each production system, there is a population that maximizes grain yield. This article presents an overview of the factors that affect optimum plant population, emphasizingthe effects of dense stands on ear development and discussing important changes in plant traits that have contributed to increase the tolerance of modern hybrids to high plant densities. Population for maize maximum economic grain yield varies from 30,000 to over 90,000pl.ha-1, depending on water availability, soil fertility, maturity rating, planting date and row spacing. When the number of individuals per area is increased beyond the optimum plant density, there is a series of consequences...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Plant population; Crowding; Barrenness.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782001000100027