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AVAILABILITY OF SOIL WATER IN THE INITIAL DEVELOPMENT OF PIGEON PEA CULTIVATED IN A CONTROLLED ENVIRONMENT - DOI: 10.13083/1414-3984/reveng.v23n1p39-47 Engenharia na Agricultura
Edna Maria Bonfim-Silva; UFMT; Gislane Renata Frigo; UFMT; Carolina Silva Alves dos Santos; UFMT; Maria Débora Loiola Bezerra; UFMT; Tonny José Araújo da Silva; UFMT.
The pigeon pea (Cajanus cajan) is an erect legume used for various purposes, such as improving plant and soil reclamation. The objective of the present study was to evaluate the development of pigeon pea cv. IAPAR 43 Arata subjected to different soil water availabilities. The experiment was conducted in a greenhouse in a completely randomized design with six soil water availabilities (20, 40, 60, 80, 100 and 120 % of the maximum capacity of water retention in the soil) and six replications. Soil moisture at field capacity was 0.24 cm3 cm-3. Plastic pots were used with 5.0 dm3 of capacity and each contained three plants. Soil moisture was maintained gravimetrically. The parameters analyzed were soil pH, SPAD reading, number of leaves and dry weight of...
Tipo: Artigo Avaliado por Pares Palavras-chave: Meteorologia Agrícola Cajanus cajan; Field capacity; Maintaining soil moisture.
Ano: 2015 URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/493
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BEYOND THE “LEAST LIMITING WATER RANGE”: RETHINKING SOIL PHYSICS RESEARCH IN BRAZIL Rev. Bras. Ciênc. Solo
van Lier,Quirijn de Jong; Gubiani,Paulo Ivonir.
As opposed to objective definitions in soil physics, the subjective term “soil physical quality” is increasingly found in publications in the soil physics area. A supposed indicator of soil physical quality that has been the focus of attention, especially in the Brazilian literature, is the Least Limiting Water Range (RLL), translated in Portuguese as "Intervalo Hídrico Ótimo" or IHO. In this paper the four limiting water contents that define RLLare discussed in the light of objectively determinable soil physical properties, pointing to inconsistencies in the RLLdefinition and calculation. It also discusses the interpretation of RLL as an indicator of crop productivity or soil physical quality, showing its inability to consider common phenological and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Modeling; Field capacity; Drought stress; Mechanical stress; Anoxic stress.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000400925
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Chlorophyll and carbohydrates in Arachis pintoi plants under influence of water regimes and nitrogen fertilization R. Bras. Zootec.
Sales,Rita Manuele Porto; Fries,Daniela Deitos; Pires,Aureliano José Vieira; Bonomo,Paulo; Santos,Iasminy Silva; Campos,Cleide Nascimento; Brito,Paulo Henrique Rodrigues; Brito,Mateus Santos.
In this experiment the chlorophyll and carbohydrate contents of Arachis pintoi were evaluated to verify if the presence of nitrogen in the soil could contribute to the effectiveness of the establishment of this legume. The design was completely randomized, in a 4 × 4 factorial arrangement, with four N rates (0, 40, 80 and 120 kg ha-1) and four irrigation levels (25, 50, 75 and 100% of field capacity), with four replications. The biochemical evaluations of chlorophylls a and b and total chlorophyll and total soluble sugars, sucrose and starch were performed. The highest contents of chlorophyll a and b and total chlorophyll in leaves were found at the dose of 120 kg ha-1. The water regime of 25% of field capacity was responsible for the lowest content of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Development; Field capacity; Legume; Starch; Sugars.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000600002
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Comparative evaluation of manual cassava harvesting techniques in Kerala, India CIGR Journal
Amponsah, Shadrack Kwadwo; Sheriff, J Thajudhin; Byju, Gangadharan.
Abstract: In India, cassava is consumed as a secondary staple along with the main staple, rice, and many rural poor consume it as the staple in different forms of preparations.  Though harvesting is known to be one of the most difficult and cost-intensive field operation in cassava cultivation, mechanisation of cassava harvesting is still very low in most cassava growing areas of India due to topographic constraints, methods and scale of cultivation.  The most viable solution to overcome these constraints is to promote the use of more efficient manual harvesting tools.  Thus, the main objective of this study was to field evaluate the efficiency of four manual cassava harvesting techniques under different land preparation methods in terms of field capacity,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Farm power and machinery; Agronomy cassava; Field capacity; Drudgery; Coppiced; Efficiency.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2793
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Desempenho e dimensionamento amostral para avaliação de uma semeadora-adubadora em plantio direto e convencional - DOI: 10.4025/actasciagron.v30i4.5295 Agronomy
Vale, Welington Gonzaga do; UENF; Garcia, Ricardo Ferreira; UENF; Thiebaut, José Tarcísio Lima; UENF; Amim, Reynaldo Tancredo; UENF; Tourino, Maria Cristina Cavalheiro; UFV.
O objetivo deste trabalho foi analisar o desempenho e o tamanho amostral ideal (n) da patinagem e a capacidade de campo de uma semeadora em plantio direto (PD) e convencional (PC). Foi utilizado o método de amostragem ao acaso para determinação de n, considerando populações infinitas. Para estimar a patinagem no PC, com α = 5% e precisão igual a 5, 10, 15 e 20%, é necessário um número de repetição igual a 115, 29, 13 e 8, respectivamente. Já no PD, observou-se 422, 106, 47 e 27, respectivamente. Para a capacidade de campo teórica (Ct) no PC, é necessário um número de repetição igual a 27, 7, 3 e 2, respectivamente. Já no PD, observou-se 45, 12, 5 e 3, respectivamente. Para a capacidade de campo efetiva (Ce) da semeadora no PC, é necessário um número de...
Palavras-chave: 5.01.00.00-9 Agronomia amostragem; Capacidade de campo; Patinagem. sampling; Field capacity; Slip.
Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5295
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Design and Development of a Drum Seeder cum Granular Urea Applicator for Rural Farmers in Bangladesh CIGR Journal
Karim, Md. Fazlul; Alam, Murshed; Ali, Md. Rostom; Kozan, Osamu.
To overcome high human stress and drudgery in rice cultivation, a pull type manually operated drum seeder cum granular urea applicator was designed and developed. It was tested in laboratory and farm for both granular urea (GU) and paddy seeds. It has three drums for applying seeds and two hoppers for applying GU, which were placed over a shaft. A relationship was found between seed rate and filling condition of drum. The seed rate was 25.48 kg/ha when drum was full of seeds and it was 64.9 kg/ha when drum was fill up with one-fourth of its capacity. Metering device consisting four cups of 25.4 mm diameter and made of mild steel (MS) sheet was designed to apply the GU uniformly. Maximum missing percentage and over falling percentage for both the hoppers...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Farm Machinery Granular urea; Paddy seed; Drum seeder; Urea applicator; Field capacity; And Field efficiency.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3202
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Effect of ecological factors on germination of horse purslane (Trianthema portulacastrum) Planta Daninha
Tanveer,A.; Mumtaz,K.; Javaid,M.M.; Chaudhry,M.N.; Balal,R.M.; Khaliq,A..
Trianthema portulacastrum is a very problematic summer crop weed and a complete crop failure has been observed because of this weed at high density. The effect of different ecological factors on germination of T. portulacastrum seeds collected in two different years (2009 and 2005) was studied in laboratory experiments. An increase in temperature from 25 to 35 ºC increased germination percentage of T. portulacastrum from 65 to 85%, after which germination started to decrease, reducing to 71.25% at 45 ºC. Trianthema portulacastrum had maximum germination with distilled water compared with different salt solutions and drought stress levels. Germination was significantly minimum at salinity and drought stress level of 250 mM and -0.8 MPa, respectively....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Temperature; Drought stress; Salt stress; Field capacity; PH; Sowing depth.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300011
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Farming Systems Components for Selected Areas in India: Evidence from ICRISAT Open Agri
H.P..
Palavras-chave: Farming systems; Systems; Bunding; Genetic soil types; Runoff; Contour bunding; Cropping systems; Field capacity; Watersheds.
Ano: 1980 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3986
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Improved monographs for estimating field efficiency and field capacity of agricultural field operations. Repositório Alice
LAL, H..
1984
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Mecanizacao agricola; Maquina; Tracao animal; Capacidade de campo; Agricultural mechanization; Animal power; Field capacity; Mecanização agrícola; Agricultural mechanization.
Ano: 1984 URL: http://www.alice.cnptia.embrapa.br/handle/doc/134426
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Influência da velocidade de deslocamento no desempenho de uma semeadora-adubadora de precisão no Norte Fluminense - doi: 10.4025/actasciagron.v33i3.6085 Agronomy
Garcia, Ricardo Ferreira; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Vale, Welington Gonzaga do; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Oliveira, Márcia Teresinha Ramos de; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Pereira, Érica Mirre; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Amim, Reynaldo Tancredo; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Braga, Thiago Costa; Universidade Estadual do Norte Fluminense Darcy Ribeiro.
O objetivo deste trabalho foi avaliar a influência da velocidade de deslocamento no desempenho de uma semeadora-adubadora de precisão. Os ensaios foram realizados em área experimental da Universidade Estadual do Norte Fluminense Darcy Ribeiro, localizada em Campos dos Goytacazes, RJ. O experimento foi montado em delineamento em blocos casualizados, utilizando duas velocidades de deslocamento, de 2,5 e 4,4 km h-1, com 16 repetições. Na semeadura, utilizou-se o milho híbrido UENF 506-8, com espaçamento entre linhas de 0,9 m e espaçamento teórico entre sementes de 11 cm. Com o aumento da velocidade de deslocamento, houve aumento na patinagem dos rodados da semeadora, na capacidade de campo efetiva, na profundidade de plantio, na velocidade periférica do disco...
Tipo: Mensurações Palavras-chave: 5.01.03.02-4 danos mecânicos; Patinagem; Profundidade de semeadura; Capacidade de campo Mecanização Agrícola mechanical damage; Slippage; Seeding depth; Field capacity.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6085
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Inoculation with mycorrhizal fungi on the growth and tolerance to water deficit of coffee plants AGRIAMBI
Moreira,Samuel D.; França,André C.; Rocha,Wellington W.; Tibães,Evandro S. R.; Neiva Júnior,Eudes.
ABSTRACT Water stress can be alleviated in plants inoculated with arbuscular mycorrhizal fungi compared to that experienced by those without mycorrhizae. The objective of this study was to evaluate the growth of coffee plants colonized by arbuscular mycorrhizal fungi under different soil moisture conditions. Seeds of the coffee cultivar Catuaí Vermelho IAC 99 and three fungal inoculants (Rhizophagus clarus, Claroideoglomus etunicatum and Dentiscutata heterogama) were used in this study. The soil moisture contents tested were 40, 60, 80, and 100% of field capacity. Seedlings in the matchstick stage were inoculated with mycorrhizae, and then later planted in plastic pots when they developed four to five pairs of definitive leaves. Both the extent of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica L.; Rubiaceae; Field capacity; Arbuscular mycorrhiza.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100747
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Las Reservas Orgánicas Edáficas y su Relación con la Capacidad de Almacenamiento de Agua de los Suelos Agrícolas Colegio de Postgraduados
López Pérez, Adolfo.
En el presente trabajo de investigación se evaluó el efecto de la calidad y cantidad de las reservas orgánicas edáficas sobre la capacidad de almacenamiento de agua en suelos con distintos contenidos de arcilla. Se usaron suelos colectados en el Laboratorio de Ingeniería de Riego “Tlapeaxco”, seleccionando aquellos que presentaron variabilidad contrastante en contenido de arcilla. Se analizaron 3 suelos a los que se les aplicaron dosis similares de 0, 15, 30 y 45 t/ha de residuos orgánicos de maíz y alfalfa, haciendo un total de 21 tratamientos con 2 repeticiones. Los suelos se incubaron bajo condiciones de laboratorio a temperatura y humedad constantes. Se determinaron los nitratos y amonio mediante la técnica de arrastre de vapor y se obtuvo la curva de...
Tipo: Tesis Palavras-chave: Reservas orgánicas edáficas; Curva de retención de humedad de los suelos; Punto de marchitamiento permanente; Capacidad de campo; Maestría; Edafología; Soil organic pool; Soil moisture retention curve; Permanent wilting point; Field capacity.
Ano: 2009 URL: http://hdl.handle.net/10521/1630
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Pedotransfer functions for water retention in different soil classes from the center-southern Rio Grande do Sul State Ciência e Agrotecnologia
Santos,Walbert Júnior Reis dos; Curi,Nilton; Silva,Sérgio Henrique Godinho; Araújo,Elias Frank de; Marques,João José.
Water retention in soil is used in many agronomic and environmental applications, but its direct measurement is time-consuming and expensive. Therefore, pedotransfer functions (PTFs) are alternatives to obtain this information faster and more economically. The objectives of this study were to generate and validate PTFs to estimate the water content at potentials of -33 kPa (field capacity) and -1500 kPa (permanent wilting point) for different soil classes from the central-south portion of Rio Grande do Sul State. The physical and chemical analyses database from soil surveys of the Celulose Riograndense Corp were used. The database is composed of particle size distribution (coarse and fine sand, silt and clay), soil organic matter, and water content data at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Permanent wilting point; Field capacity; Water retention curve.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000100006
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PEDOTRANSFER FUNCTIONS FOR WATER RETENTION IN THE MAIN SOILS FROM THE BRAZILIAN COASTAL PLAINS Ciência e Agrotecnologia
Silva,Elidiane da; Curi,Nilton; Ferreira,Mozart Martins; Volpato,Margarete Marin Lordelo; Santos,Walbert Júnior Reis dos; Silva,Sérgio Henrique Godinho.
Pedotransfer functions (PTFs) are equations used to estimate soil characteristics difficult to determine from other easily obtained ones. Water retention in soil is used in several agronomic and environmental applications, but its direct determination is time consuming and onerous, therefore PTFs are alternatives to obtaining this information more quickly and economically. The aims of this study were to generate a database and develop PTFs for water retention at potentials of -33 kPa (field capacity) and -1500 kPa (permanent wilting point) for Yellow Argisol and Yellow Latosol from the Brazilian Coastal Plains region. The Coastal Plains soils are mostly developed from Barreiras formation (pre-weathered sediments) and their main uses are sugarcane,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Database; Pedofunction; Permanent wilting point; Field capacity.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000400331
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Pedotransfer functions to estimate retention and availability of water in soils of the state of Santa Catarina, Brazil Rev. Bras. Ciênc. Solo
Costa,André da; Albuquerque,Jackson Adriano; Almeida,Jaime Antônio de; Costa,Adriano da; Luciano,Rodrigo Vieira.
Studies on water retention and availability are scarce for subtropical or humid temperate climate regions of the southern hemisphere. The aims of this study were to evaluate the relations of the soil physical, chemical, and mineralogical properties with water retention and availability for the generation and validation of continuous point pedotransfer functions (PTFs) for soils of the State of Santa Catarina (SC) in the South of Brazil. Horizons of 44 profiles were sampled in areas under different cover crops and regions of SC, to determine: field capacity (FC, 10 kPa), permanent wilting point (PWP, 1,500 kPa), available water content (AW, by difference), saturated hydraulic conductivity, bulk density, aggregate stability, particle size distribution (seven...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Field capacity; Permanent wilting point; Plant available water; Correlation analysis; Path analysis.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400007
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Performance of lugged cage wheel for wetland cultivation CIGR Journal
Kumar, Arvind; Baruah, D.C..
Rice is a major food grain crop grown in North-eastern Himalayan region of India with varying level of mechanization. Rice field remains wet and loose for a considerable period of growing season. Land preparation of rice field is one of the critical operations both in terms of timeliness and energy requirement. The losses up to 70%-80% of input power are reported while negotiating wetland terrain by tractors or power tillers, particularly in difficult terrain. This paper described the attempts made to address the issue of wetland traction primarily relevant to mechanization of rice cultivation in North-eastern Himalayan region of India. There is a variety of design of cage wheels used on power tillers with varying levels of performances based on the soil...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Engineering; Farm Machinery and Power split lug; Cage wheel; Wetland cultivation; Wheel slip; Field capacity.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3819
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Plant-available soil water capacity: estimation methods and implications Rev. Bras. Ciênc. Solo
Silva,Bruno Montoani; Silva,Érika Andressa da; Oliveira,Geraldo César de; Ferreira,Mozart Martins; Serafim,Milson Evaldo.
The plant-available water capacity of the soil is defined as the water content between field capacity and wilting point, and has wide practical application in planning the land use. In a representative profile of the Cerrado Oxisol, methods for estimating the wilting point were studied and compared, using a WP4-T psychrometer and Richards chamber for undisturbed and disturbed samples. In addition, the field capacity was estimated by the water content at 6, 10, 33 kPa and by the inflection point of the water retention curve, calculated by the van Genuchten and cubic polynomial models. We found that the field capacity moisture determined at the inflection point was higher than by the other methods, and that even at the inflection point the estimates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Field capacity; Permanent wilting point; Soil water retention curve modeling; Oxisol; Land use planning.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200011
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RETENTION CURVES AND AVAILABLE WATER CAPACITY IN LATOSOLS REA
Maia,Felipe C. de O.; Bufon,Vinicius B.; Leão,Tairone P..
ABSTRACT Water stored in the soil between field capacity and the permanent wilting point, is known as the available water capacity. Its availability to be effectively used by plants depends on the type of soil and its water retention characteristics. The aim of this work was to compile information about water retention curves in Latosols, and to provide a first approximation of values and most likely amplitudes for water storage and available water capacity of these soils. The database was constituted from information collected from articles, theses, dissertations and other publications. Soil water retention curves, as well as available water, were estimated for the order Latosols, and for the suborders Red Latosol (RL), Red-Yellow Latosol (RYL) and Yellow...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Field capacity; Permanent wilting point; Van Genuchten; Tropical soils.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400546
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Soil spatial variability and the estimation of the irrigation water depth. Repositório Alice
REICHARDT, K.; SILVA, J. C. de A.; BASSOI, L. H.; TIMM, L. C.; OLIVEIRA, J. C. M. de; BACCHI, O. O. S.; PILLOTTO, J. E..
The effects of soil water spatial variability previous to irrigation and of the field capacity on the estimation of irrigation water depth are evaluated. The experiment consisted of a common bean (Phaseolus vulgaris L.) crop established on a Kandiudalfic Eutrudox of Piracicaba, SP, Brazil, irrigated by central pivot, in which soil water contents were evaluated with a depth neutron gauge, in a grid of 20x4 points with lag of 0.5 m. In a given situation, the 80 calculated irrigation water depths presented a coefficient of variation of 29.3%, with an average water value of 18 mm, maximum of 41 mm and minimum of 9 mm. It is concluded that the only practical way of irrigation is the use of an average water depth, due to the inherent variability of the soil, and...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Capacidade de campo; Espaco; Variabilidade; Irrigation water depth; Soil moisture; Spatial variability; Água; Irrigação; Profundidade; Umidade do Solo; Field capacity.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/134466
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Soil spatial variability and the estimation of the irrigation water depth Scientia Agricola
Reichardt,Klaus; Silva,José Carlos de Araújo; Bassoi,Luis Henrique; Timm,Luís Carlos; Oliveira,Julio Cesar Martins de; Bacchi,Osny Oliveira Santos; Pilotto,João Eduardo.
The effects of soil water spatial variability previous to irrigation and of the field capacity on the estimation of irrigation water depth are evaluated. The experiment consisted of a common bean (Phaseolus vulgaris L.) crop established on a Kandiudalfic Eutrudox of Piracicaba, SP, Brazil, irrigated by central pivot, in which soil water contents were evaluated with a depth neutron gauge, in a grid of 20x4 points with lag of 0.5 m. In a given situation, the 80 calculated irrigation water depths presented a coefficient of variation of 29.3%, with an average water value of 18 mm, maximum of 41mm and minimum of 9 mm. It is concluded that the only practical way of irrigation is the use of an average water depth, due to the inherent variability of the soil, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation water depth; Field capacity; Spatial variability.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000300017
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