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Dissertations / Theses on the topic 'Potassium in agriculture'

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Published: 4 June 2021

Last updated: 29 January 2023

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1

Steiner, Fábio [UNESP]. "Balanço de potássio no sistema solo-planta influenciado pela textura e adubação potássica em solos tropicais." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/110938.

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Made available in DSpace on 2014-12-02T11:16:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-06-02Bitstream added on 2014-12-02T11:21:40Z : No. of bitstreams: 1 000791309.pdf: 1284565 bytes, checksum: 0445b1b0a9e7b205a00ea84a71349e29 (MD5)<br>Estudos que contemplem o balanço de potássio (K) no sistema solo-planta são importantes para avaliar se as quantidades de fertilizantes aplicadas anualmente estão sendo aproveitadas para manter e/ou, melhorar a fertilidade do solo, ou estão intensificando as perdas de K por lixiviação. O objetivo deste estudo foi avaliar o efeito da adubação p

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2

Job, André Luiz Gomes [UNESP]. "Doses e parcelamento da adubação potássica na cultura da batata (Solanum tuberosum L.)." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/113791.

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Made available in DSpace on 2015-01-26T13:21:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-08-01Bitstream added on 2015-01-26T13:30:58Z : No. of bitstreams: 1 000806682.pdf: 1212856 bytes, checksum: 9bdc93d0aca0fe7af2adc814f3b02a62 (MD5)<br>Com o uso de cultivares de batata (Solanum tuberosum L.) mais produtivas, possivelmente a demanda por nutrientes também ficou maior, levando a necessidade de se adequar a adubação. Dentre os nutrientes absorvidos pela cultura, destaca-se o potássio (K), que é extraído em grande quantidade, e é de extrema importância para o desenvolvimento da c

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3

Abrahão, Camila [UNESP]. "Fontes potássicas na produção do pimenteiro em substrato fertirrigado." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/127719.

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Made available in DSpace on 2015-09-17T15:25:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-02-13. Added 1 bitstream(s) on 2015-09-17T15:49:13Z : No. of bitstreams: 1 000847004.pdf: 2056553 bytes, checksum: bc56672de81419062be1c9485450c8db (MD5)<br>O excesso da adubação pode causar prejuízos na cultura do pimenteiro e danos ao meio ambiente. Por isso, a escolha do fertilizante e a aplicação de uma solução nutritiva equilibrada são fundamentais para a produção e qualidade do produto final. Assim, objetivou-se com o presente trabalho avaliar os efeitos do incremento da adubação potá

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4

Abrahão, Camila 1981. "Fontes potássicas na produção do pimenteiro em substrato fertirrigado /." Botucatu, 2015. http://hdl.handle.net/11449/127719.

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Orientador: Roberto Lyra Villas Bôas<br>Banca: Dirceu Maximino Fernandes<br>Banca: Rumy Goto<br>Banca: Caroline de Moura D'Andrea Mateus<br>Banca: Luiz Vitor Crepaldi Sanches<br>Resumo: O excesso da adubação pode causar prejuízos na cultura do pimenteiro e danos ao meio ambiente. Por isso, a escolha do fertilizante e a aplicação de uma solução nutritiva equilibrada são fundamentais para a produção e qualidade do produto final. Assim, objetivou-se com o presente trabalho avaliar os efeitos do incremento da adubação potássica, utilizando diferentes fontes e doses potássicas na produção dos fruto

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5

Steiner, Fábio 1980. "Balanço de potássio no sistema solo-planta influenciado pela textura e adubação potássica em solos tropicais /." Botucatu :, 2014. http://hdl.handle.net/11449/110938.

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Orientador: Ciro Antonio Rosolem<br>Banca: Alberto Carlos de Campos Bernardi<br>Banca: Paulo Sérgio Pavinato<br>Banca: José Salvador Simoneti Foloni<br>Banca: Juliano Carlos Calonego<br>Resumo: Estudos que contemplem o balanço de potássio (K) no sistema solo-planta são importantes para avaliar se as quantidades de fertilizantes aplicadas anualmente estão sendo aproveitadas para manter e/ou, melhorar a fertilidade do solo, ou estão intensificando as perdas de K por lixiviação. O objetivo deste estudo foi avaliar o efeito da adubação potássica no balanço de K no sistema solo-planta em dois solos

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6

Galadima, Abraham 1956. "Potassium release kinetics and the effect of potassium fertilizer application on cotton growth, development, and yield in several Sonoran dessert soils of Arizona." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/282870.

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In an effort to determine the agronomic necessity of K fertilization of cotton (Gossypium spp.) in Arizona, a five-year study was initiated in 1991, with a single field study near Gila Bend. Subsequent sites selected ranged from western (Yuma) to eastern (Safford) Arizona which totaled 11 site-years. Both Upland (G. hirsutum L.) and Pima (G. barbadense L.) cottons were cultivated, using soil and foliar applications of K. In 1992, study sites included the Safford Ag. Center (SAC), Maricopa Ag. Center (MAC), and a fanner cooperator site at Coolidge. In 1993, the experiment stations (SAC and MAC)

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7

Job, André Luiz Gomes 1979. "Doses e parcelamento da adubação potássica na cultura da batata (Solanum tuberosum L.) /." Botucatu, 2014. http://hdl.handle.net/11449/113791.

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Orientador: Rogério Peres Soratto<br>Coorientador: Adalton Mazetti Fernandes<br>Banca: Thiago Leandro Factor<br>Banca: Roberto Lyra Villas Boas<br>Resumo: Com o uso de cultivares de batata (Solanum tuberosum L.) mais produtivas, possivelmente a demanda por nutrientes também ficou maior, levando a necessidade de se adequar a adubação. Dentre os nutrientes absorvidos pela cultura, destaca-se o potássio (K), que é extraído em grande quantidade, e é de extrema importância para o desenvolvimento da cultura, para a elevação da produtividade e para proporcionar tubérculos de maior qualidade. Muitos p

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8

Unrah, B. L., J. C. Silvertooth, D. M. Hendricks, and J. E. Malcuit. "Potassium Fertility of Several Arizona Soils." College of Agriculture, University of Arizona (Tucson, AZ), 1993. http://hdl.handle.net/10150/209581.

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Potassium (K) fertility requirements for cotton ( Gossypium spp) have been a matter of concern due to increasing interest and emphasis on fiber quality and numerous reports of K deficiencies in various cotton producing regions. To address this matter appropriately, a thorough understanding of the chemical, physical, and mineralogical composition of the soils in question is in order. Soil samples were collected from ten sites across southern Arizona that are representative of the common agricultural soils of the region. At all locations soils were sampled to a depth of 120 cm in 30 cm increment

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9

Andrist, Rangel Ylva. "Quantifying mineral sources of potassium in agricultural soils /." Uppsala : Deptartment of Soil and Environment, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200853.pdf.

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10

Stenhouwer, Richard Charles. "Transport and adsorption interactions of band applied anhydrous ammonia and potassium cholride solution /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487681788252882.

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11

Davis, Jayne L. "The relationship between potassium deficiency and fungal pathogens in barley." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3226/.

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In the field crops are subject to a wide variety of biotic and abiotic stresses. In order to manage crop protection effectively it is important that we understand not only the way plants respond to these stresses, but the way in which these responses interact. High levels of fertilisers and pesticides are often applied to maintain soil nutritional status and prevent disease in modern intensive farming systems. Potassium (K) is an essential element for plant growth and development, and is required for a wide variety of processes within the plant. These processes can be broadly divided into biop

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12

Unruh, B. L., J. C. Silvertooth, A. Galadima, L. J. Clark, and E. R. Norton. "Potassium Fertilization of Upland and Pima Cotton." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/209651.

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In a continuing effort to assess the agronomic necessity of potassium (K) fertilization in Arizona cotton (Gossypium spp.) production, one new and two on-going (Maricopa and Safford Ag. Centers), K fertility studies were conducted in 1993. They included locations ranging from western (Yuma) to eastern (Safford) Arizona, with both Upland (G. hirsutum L.) and American Pima (G. barbadense L.) cotton, using soil and foliar applications of K. The results indicated that there was no response to the added K at any of the locations by either Upland or Pima cotton.

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13

Williams, James David. "Potassium concentration during production affects tomato (Lycopersicon esculentum Mill.) transplant response to postproduction water stress /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487693923197934.

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14

Tenywa, John Stephen. "Crop residue influence on exchangeable aluminum, potassium availability, and seedling root growth in a oxisol /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487844105976783.

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15

Silvertooth, J. C., and A. Galadima. "Evaluation of Potassium Fertility in a Common Agricultural Soil of Arizona." College of Agriculture, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/197715.

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Two field experiments were conducted during the 2001 growing season to address potassium (K) fertility response of two commonly grown varieties of cotton in Arizona. The studies were conducted near Coolidge, AZ in two separate fields and each consisted of two treatments, an untreated control and a treatment receiving a preseason side-dress application of K fertilizer. Plant growth and development estimates revealed that fruit retention (FR) and height to node ratio (HNR) levels were similar for both treatments in both fields. Lint yield data also indicated no difference between the fertilized

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16

Bergmann, Nicolas. "On-farm evaluation of fluid starter potassium fertilization for corn using precision agriculture technologies." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1473182.

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17

Silvertooth, J. C., E. R. Norton, and A. Galadima. "Evaluation of Potassium and Phosphorus Fertility in Arizona Soils." College of Agriculture, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/211298.

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Two field experiments were conducted during the 2000 growing season to address fertility recommendations for fertilizer phosphorus (P) and potassium (K). A K fertility study was conducted near Tonopah, AZ consisting of two treatments, an untreated control and a treatment receiving a total of 20 gallons of K-Sul/acre. No significant differences were observed in leaf blade K concentrations between treatments. Plant growth and development estimates revealed that fruit retention (FR) levels remained consistently higher in the untreated control versus the treated plots. A second study involved trea

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18

Bueno, Juliana Azevedo Ruggiero. "Densidades de plantio e doses de potássio em abacaxizeiro Pérola sob irrigação /." Jaboticabal, 2016. http://hdl.handle.net/11449/144233.

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Orientador: Antonio Baldo Geraldo Martins<br>Coorientador: Manoel Evaristo Ferreira<br>Banca: Aparecida Conceição Boliani<br>Banca: Adriana de Castro Correia da Silva<br>Banca: Rita de Cássia Panizzi<br>Banca: Mara Cristina Pessôa da Cruz<br>Resumo: O plantio de abacaxi no Brasil é direcionado para o consumo in natura. Produzido principalmente no Norte e Nordeste, as variedades mais plantadas é o Pérola (com mais de 80% da área produzida) e o Smooth Cayenne. Este estudo evidenciou o efeito de diferentes densidades e doses de potássio na planta e no fruto de abacaxi Pérola em sistema irrigado,

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19

Rose, Terry. "Deep-placed phosphate fertiliser improves phosphorus uptake and seed yield of canola (Brassica napus L.) in a Mediterranean-type climate." University of Western Australia. Dept. of Soil Science and Plant Nutrition, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0237.

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In Mediterranean-type climates, topsoil frequently dries out during spring. Problems associated with reduced nutrient (P, K) availability in dry topsoil may be overcome by placing fertilisers deeper in the soil, where the soil is more likely to remain moist for longer periods as opposed to conventional fertiliser placement. Deep-P placement has resulted in significant yield improvements for lupin crops in Mediterranean environments because lupin crops generally require soil P supply during spring (throughout the flowering stage); in contrast, wheat yields have seldom improved with deep P place

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Unruh, B. L., J. C. Silvertooth, A. J. Steger, and E. R. Norton. "Nitrogen, Phosphorus, and Potassium Uptake by Upland and Pima Cotton." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/209649.

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Several investigations of nitrogen (N), phosphorus (P), and potassium (K) uptake by Upland cotton (Gossypium hirsutum L.) have been conduced, however no investigations of this type have included American Pima cotton (G. barbadense L.). We conducted a study to describe the total N, P, and K uptake and the partitioning of each nutrient into various plant parts for both Upland and Pima cotton. During the growing seasons of 1990, 1991, and 1992 at two south-central Arizona locations, both Upland (var. DPL 90) and Pima (var. S-6) cotton were grown. Beginning 14 to 20 d after emergence, whole cotton

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21

Rethwisch, Michael D., Mark Reay, Aron Quist, Tim Cox, Jessica Grudovich, and Jessica Wellman. "Comparison of Potassium Fertilizer Products and Amounts on DPL555BR Cotton, 2003." College of Agriculture, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/198132.

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22

Silvertooth, J. C., S. H. Husman, J. E. Malcuit, and T. A. Doerge. "Upland Cotton Resposne to Soil and Foliar Applies Potassium Fertilizer, 1991." College of Agriculture, University of Arizona (Tucson, AZ), 1992. http://hdl.handle.net/10150/208656.

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A single field experiment was conducted near Gila Bend, Arizona in 1991 to evaluate the effects of both soil and foliar applied potassium (K) fertilizersto Upland (Gossvpium hirsutum L.) cotton to a soil testing 315 ppm K (high). Soil applied K fertilizer at rates of 0, 75,150, and 225 lbs. K₂O/acre as K₂SO₄ were broadcast and preplant incorporated before listing. Foliar applications were made in all combinations with the various soil applied K treatments and consisted of four applications of 4.6 lbs. K₂O /acre as KNO₃ (10 lbs. KNO₃ /acre) over the first fruiting cycle, by a ground applicator

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23

Wright, Glenn C., and Marco Peña. "Foliar applications of Lo-Biuret Urea and Potassium Phosphite to Navel Orange trees." College of Agriculture, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/198099.

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This experiment was established in January 2000 in a block of ‘Washington’ navel orange trees at Verde Growers, Stanfield, AZ. Treatments included: normal grower practice, winter low biuret (LB) urea application, summer LB urea application, winter LB urea application plus winter and spring potassium phosphite, winter LB urea application plus summer potassium phosphite, and normal grower practice plus spring potassium phosphite. Each treatment was applied to approximately four acres of trees. For 2000-01, yields ranged from 40 to 45 lbs. per tree, and there was no effect of treatments up

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Galadima, A., J. C. Silvertooth, E. R. Norton, and S. H. Husman. "Potassium Fertilization of Pima and Upland Cotton at Three Arizona Locations." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/210919.

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Three field trials were conducted in Arizona in 1995 at three locations (Safford, Maricopa and Buckeye) to evaluate yield benefits associated with potassium (K) fertilization. The 1995 and previous years studies were aimed at assessing the agronomic necessity of K fertilization in Arizona cotton (Gossvpium spp.) production. At the Safford Agriculture center (Pima clay loam), both Upland (G hirsutum L., var. DPL 90) and Pima (G. barbadense L., var. S-7) cotton included treatments of both soil and foliar K applications. The trial at Maricopa Agricultural Center (Casa Grande sandy loam) included

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Wright, Glenn C., and Marco Peña. "Foliar applications of Lo-Biuret Urea and Potassium Phosphite to Navel Orange trees." College of Agriculture, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/197989.

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This experiment was established in January 2000 in a block of ‘Washington’ navel orange trees at Verde Growers, Stanfield, AZ. Treatments included: normal grower practice, winter low biuret (LB) urea application, summer LB urea application, winter LB urea application plus winter and spring potassium phosphite, winter LB urea application plus summer potassium phosphite, and normal grower practice plus spring potassium phosphite. Each treatment was applied to approximately four acres of trees. For 2000-01, yields ranged from 40 to 45 lbs. per tree, and there was no effect of treatments upo

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Foloni, José Salvador Simoneti [UNESP]. "Dinâmica do potássio em sistema de produção de soja em rotação com aveia e milheto." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/100011.

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Made available in DSpace on 2014-06-11T19:30:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-10-10Bitstream added on 2014-06-13T19:00:35Z : No. of bitstreams: 1 foloni_jss_dr_botfca.pdf: 804895 bytes, checksum: eed8c0d64df6ac23a2b7d1aa9d626398 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Objetivou-se com este trabalho avaliar a dinâmica do potássio no sistema solo-palha-planta, com a rotação das culturas milheto, soja e aveia preta conduzidas em semeadura direta, em função do manejo da adubação potássica ao longo de três anos agrícolas. O experimento fo

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27

Corrêa, Carla Verônica 1983. "Produção e qualidade de batata-doce em função das doses e parcelamento da adubação potássica /." Botucatu, 2016. http://hdl.handle.net/11449/136294.

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Orientador: Antonio Ismael Inácio Cardoso<br>Banca: Arthur Bernardes Cecilio Filho<br>Banca: Pablo Forlan Vargas<br>Resumo: Embora existam estudos sobre nutrição e recomendações de adubação para o cultivo de batata-doce, raramente se encontram trabalhos que abordem os efeitos do potássio e de seu parcelamento na adubação em cobertura na sua produção e qualidade das raízes. Em vista disso, objetivou-se, com a realização deste experimento, avaliar a influência do parcelamento e das doses de potássio em cobertura na produção e qualidade de raízes tuberosas de batata-doce. O experimento foi conduz

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28

Galadima, A., and J. C. Silvertooth. "Mathematical Models of Potassium Release Kinetics for Sonoran Desert Soils of Arizona." College of Agriculture, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/210381.

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The objective of this study was to determine the potassium (K) release kinetics of clay samples from 10 agricultural representative soils of Arizona by successive extraction using Ca-saturated cation resin. A 1993 physical and chemical characterization of the soils revealed that all soils contain smectite-mica K bearing minerals. Four mathematical models (power function, Elovich, parabolic diffusion and first-order) were used to describe the nonexchangeable K release reaction involving 700-hr cumulative reaction time. Comparison of the models using the coefficient of determination (r²) and the

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29

Wright, Glenn C., and Marco Peña. "Foliar applications of Lo-Biuret Urea and Potassium Phosphite to Navel Orange trees." College of Agriculture, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/223652.

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This experiment was established in January 2000 in a block of 'Washington' navel orange trees at Verde Growers, Stanfield, AZ. Treatments included: normal grower practice, winter low biuret (LB) urea application, summer LB urea application, winter LB urea application plus winter and spring potassium phosphite, winter LB urea application plus summer potassium phosphite, and normal grower practice plus spring potassium phosphite. Each treatment was applied to approximately four acres of trees. For 2000-01, yields ranged from 40 to 45 lbs. per tree, and there was no effect of treatments upon tota

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Wright, Glenn, and James Walworth. "Foliar applications of Lo-Biuret Urea and Potassium Phosphite to Navel Orange Trees." College of Agriculture, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/226094.

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This experiment was established in January 2000 in a block of 'Washington' navel orange trees at Verde Growers, Stanfield, AZ. Treatments included: normal grower practice, winter low biuret (LB) urea application, summer LB urea application, winter LB urea application plus winter and spring potassium phosphite, winter LB urea application plus summer potassium phosphite, and normal grower practice plus spring potassium phosphite. Each treatment was applied to approximately four acres of trees. For 2000-01, yields ranged from 40 to 45 lbs. per tree, and there was no effect of treatments upon tota

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31

Razmjoo, Ghalaie Khorshid. "Effect of potassium, sulfur, boron, and molybdenum fertilization on alfalfa production and herbage composition /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260859495673.

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Blocker, Shannon M. "Impacts and correction of potassium deficiency in no-till and strip-till soybean and corn production." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2346.

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Unrah, B. L., J. C. Silvertooth, L. J. Clark, J. Nelson, and J. E. Malcuit. "Upland and Pima Cotton Response to Soil and Foliar Potassium at Three Arizona Locations." College of Agriculture, University of Arizona (Tucson, AZ), 1993. http://hdl.handle.net/10150/209540.

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Due to a limited information describing the response of cotton (Gossvpium spp.) in Arizona to K fertilization, three studies were conducted in 1992 with the objective of evaluating the response of cotton crop growth and lint yield to soil and/or foliar applications of K fertilizer. The locations of the trials included the Safford Agriculture Center (Pima clay loam), Maricopa Agriculture Center (Casa Grande sandy loam), and a site located near Coolidge, AZ on a Mohall sandy loam soil. All irrigation, pest management, and fertilization inputs (other than K) were provided on an as- needed basis t

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Crane, Kristy Susanne. "Pressurized Hot Water: An Alternative Method of Nutrient Extraction and Subsequent Analysis for Use in Small-Scale Agriculture." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd495.pdf.

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Galadima, A., J. C. Silvertooth, and E. R. Norton. "Potassium Fertilization of Upland and Pima Cotton (1991-1995, a five year project review)." College of Agriculture, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/210394.

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In an effort to provide information on the agronomic necessity of potassium (K) fertilization in Arizona cotton (Gossypium spp.) production, a five-year study was initiated in 1991 with a single field study located near Gila Bend. Subsequent study sites selected ranged from western (Yuma) to eastern (Safford) Arizona, which totaled 11 site years. Both Upland (G. hirsutum L.) and American Pima (G. barbadense L.) cotton were cultivated, using soil and foliar applications of K. In 1992, study sites included the Safford Ag. Center (SAC), Maricopa Ag. Center (MAC), and a Cooperator site at Coolidge

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Husman, Stephen H., and Thomas Doerge. "The Effects of Foliar Applies Potassium Thiosulfate on Upland Cotton Lint Yield and Fibert Quality." College of Agriculture, University of Arizona (Tucson, AZ), 1993. http://hdl.handle.net/10150/209582.

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A replicated field study was conducted at the Maricopa Agricultural Center in 1992 investigating Upland cotton lint yield and fiber quality response to foliar applied potassium thiosulfate. Applications were applied at early, peak, and late bloom. There were no significant yield or lint quality response by treatment.

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Zoca, Samuel Menegatti [UNESP]. "Avaliação da liberação de potássio por resíduos do benefício de café." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/86389.

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Made available in DSpace on 2014-06-11T19:22:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-05-04Bitstream added on 2014-06-13T20:28:25Z : No. of bitstreams: 1 zoca_sm_me_botfca.pdf: 788377 bytes, checksum: 4401184098c735dfc2400f9bbe8ce950 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>O Brasil é o maior produtor mundial de café, com uma produção estimada em 43,5 milhões de sacas beneficiadas na safra 2011, uma vez que, o processamento do café gera grandes quantidades de resíduos sól

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Coomer, Taylor Dayne. "Effect of Potassium Deficiency on Uptake and Partitioning in the Cotton (Gossypium hirsutum L.) Plant and Detection by a Crop Reflectance Sensor." Thesis, University of Arkansas, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10110014.

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<p> For cotton (<i>Gossypium hirsutum</i> L.) to grow and develop normally, plants need to uptake the necessary amount of nutrients and use those nutrients in a beneficial fashion. It is recognized that cotton needs a certain tissue concentration of ions to achieve and maintain growth rates (Siddiqi et al., 1987). One of the most essential and abundant nutrients in cotton is potassium (K), second only by mass to nitrogen (N) (Marschner, 1995; Oosterhuis et al., 2013). Potassium exists in the soil in four separate pools and moves through soil to roots mainly through diffusion (Rengel & Damo

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Rowley, Sean D. "Phosphorus and Potassium Fertility Management for Maximizing Tart Cherry Fruit Quality and Productivity on Alkaline Soils." DigitalCommons@USU, 2013. http://digitalcommons.usu.edu/etd/1518.

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Suitable orchard land in regions of high elevation, arid climates, and alkaline soil conditions is becoming more limited due to urban sprawl. With the loss of suitable farmland, increasing input costs, and the lack of sound fertility information for these regions, fruit growers face challenges in producing high quality fruit to meet local and general market demand. The question that arises is whether fruit growers can supply sufficient quantities of quality fruit to take full advantage of local and global demand. Government data for population, fruit production, and fruit consumption in Utah w

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Foloni, José Salvador Simoneti 1970. "Dinâmica do potássio em sistema de produção de soja em rotação com aveia e milheto /." Botucatu : [s.n.], 2003. http://hdl.handle.net/11449/100011.

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Orientador: Ciro Antonio Rosolem<br>Banca: Leandro Borges Lemos<br>Banca: Carlos Alexandre Costa Crusciol<br>Banca: Silvestre Bellettini<br>Banca: José Antonio Quaggio<br>Resumo: Objetivou-se com este trabalho avaliar a dinâmica do potássio no sistema solo-palha-planta, com a rotação das culturas milheto, soja e aveia preta conduzidas em semeadura direta, em função do manejo da adubação potássica ao longo de três anos agrícolas. O experimento foi conduzido na Fazenda Experimental Lageado da FCA/UNESP, em Botucatu-SP, nos anos agrícolas de 2000/2001, 2001/2002 e 2002/2003. O solo foi classifica

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Raath, P. J. (. Pieter Johannes). "Effect of varying levels of nitrogen, potassium and calcium nutrition on table grape vine physiology and berry quality." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/19996.

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Thesis (PhD(Agric))--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: A lack of defects is required for successful table grape marketing, which pre-suppose optimal vine performance, berry development and post-harvest quality. The supply of mineral nutrients affects vine development, physiology and berry quality. Despite a vast amount of research conducted over decades, there remain many unresolved issues regarding table grape vine nutrition to ensure optimal table grape quality and shelve-life. Unjustified fertilisation practices often include excessive applications of nitrogen (N),

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Lachapelle, Mathieu. "Réévaluation des besoins en azote, phosphore et potassium des cultures de brocoli, de chou et de chou-fleur en sols minéraux au Québec." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/26947/26947.pdf.

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Galadima, A., J. C. Silvertooth, B. L. Unruh, and E. R. Norton. "Effect of Soil and Foliar Applied Potassium on Pima and Upland Cotton at Two Arizona Locations." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/210326.

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Due to increasing emphasis and interest being placed on cotton (Gossypium spp.) fiber quality as well as yield benefits associated with potassium (K) fertilization, two studies were conducted in 1994. These studies with those before them were aimed at assessing the agronomic necessity of K fertilization in Arizona cotton production. The locations of the trials included Maricopa Agricultural Center (Casa Grande sandy loam) and Safford Agricultural Center (Pima clay loam). At the Safford location, both Upland (G. hirsutum L., var. DPL 90) and Pima (G. barbadense L., var. S-7) cotton were planted

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Zoca, Samuel Menegatti 1985. "Avaliação da liberação de potássio por resíduos do benefício de café /." Botucatu : [s.n.], 2012. http://hdl.handle.net/11449/86389.

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Resumo: O Brasil é o maior produtor mundial de café, com uma produção estimada em 43,5 milhões de sacas beneficiadas na safra 2011, uma vez que, o processamento do café gera grandes quantidades de resíduos sólidos, e também, esses resíduos podem proporcionar problemas ambientais, torna-se de grande importância o estudo de alternativas de utilização desses materiais, sendo assim, objetivou-se nesse experimento caracterizar cinco tipos de resíduos do benefício de café e avaliar seu valor como fertilizante potássico, estudando a liberação do nutriente. O experimento foi realizado em colunas com s

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Damar, Hada. "Évaluation de la stabilité du rendement fourrager et de la dynamique du potassium et du phosphore dans un Gleysol humique de l'Est du Canada." Doctoral thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/69370.

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Un approvisionnement stable en fourrage est important pour la pérennité des fermes laitières dans l'Est du Canada. En plus de l'azote, la croissance optimale des cultures fourragères nécessite un apport adéquat en potassium (K) et en phosphore (P), dont la disponibilité pourrait être influencée par les pratiques culturales. L'objectif principal de cette thèse était d'évaluer la stabilité des rendements fourragers sous des pratiques culturales contrastées, mais également de comprendre comment ces pratiques influent sur la dynamique du K et du P dans un sol argileux de l'Est canadien. Un disposi

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Agenbach, G. "Experiments to modify grape juice potassium content and wine quality on granite derived soils near Paardeberg /." Link to the online version, 2006. http://hdl.handle.net/10019/488.

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Hooge, Susan E. "Impact of potassium chloride on saltiness, bitterness, and other sensory characteristics in model soup systems." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/691.

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Chaouechi, Ameni. "Lixiviation du potassium sous culture de pomme de terre irriguée en sol sableux : impact des engrais azotés." Master's thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/25452.

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Au Québec, la pomme de terre est cultivée sur des sols sableux favorisant les pertes par lixiviation de l’azote et du potassium. Selon le principe de réactions d’échanges cationiques, on a supposé que les doses et les sources d'azote puissent avoir un impact sur la lixiviation du potassium. Ainsi, une expérience a été menée, pendant trois années, dans un champ de pomme. Le dispositif expérimental est un bloc complet aléatoire de quatre répétitions constitué de 10 traitements qui sont un factoriel de trois sources d'azote (nitrate d’ammonium, sulfate d’ammonium et un engrais à libération lente)

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Bakker, Eleanor. "The impact of plant growth and potassium uptake on clay minerals in soil." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAU012/document.

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Le potassium est un nutriment essentiel à la croissance et au développement des plantes. Les minéraux argileux dans les sols représentent un important réservoir de K disponible pour les plantes. L'extraction de K fixé à partir de l'espace interfoliaire des minéraux micacés 2:1 peut entraîner une augmentation de la distance feuillet à feuillet qui peut être mesurée par diffraction des rayons X . Des échantillons de l'expérience Morrow Plots continue avec du maïs (C) ou du maïs-avoine-foin (R), provenant de sous-parcelles fertilisées (F) et non fertilisées (U) pour les années 1904, 1957, 1980, 1

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Hartley, Paul Evan. "Genesis, mineralogy, and micromorphology of vertic soils in southeastern Kansas." Thesis, Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/4025.

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