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Silicate rocks as an alternative potassium fertilizer for upland rice and commo...
Soratto,Rogério Peres; Crusciol,Carlos Alexandre Costa; Campos,Murilo de; Costa,Claudio Hideo Martins da; Gilabel,Amanda PradoAbstract: The objective of this work was to evaluate the efficiency of molten and ground alkaline potassium-silicate rocks (K1) and of ground phonolite rock (K2) as sources of potassium for upland rice (Oryza sativa) and common bean (Phaseolus vulgaris) crops, in comparison with the traditional source (KCl). Two experiments - one with each crop - were conducted on a Typic Haplorthox in a randomized complete blo...
Shoot growth, tuber yield and quality of two potato cultivars as affected by pr...
Oliveira,Luan Santos de; Fernandes,Adalton Mazetti; Soratto,Rogério Peres; Han,Daniela; Silva,Rudieli Machado daABSTRACT This study evaluated the effects of the rates and timings of prohexadione-calcium (prohexadione-Ca) application on shoot growth, tuber yield, and quality of two potato cultivars (Agata and Mondial). An experiment with each cultivar was carried out in a greenhouse using a randomized block design with four replications. Treatments consisted of a control and single or sequential foliar applications of pro...
Potato yield and phosphorus nutrition using humic substances in two soil textures
Martins,Jéssyca Dellinhares Lopes; Soratto,Rogério Peres; Fernandes,Adalton MazettiAbstract: The objective of this work was to evaluate the effect of humic substances (HS) and phosphorus fertilizer on the growth, P uptake, tuber yield, fertilizer P recovery (FPR), and applied P-use efficiency (APUE) of potato (Solanum tuberosum) cultivated in a sandy and in a clayey soils. In both soils, the experiment was carried out in a randomized complete block design, in a 4×3 factorial arrangement, with...
Agronomic and Economic Interactions between Sidedressed Nitrogen and Potassium ...
Yagi,Renato; Nazareno,Nilceu Ricetti Xavier de; Soratto,Rogério PeresAbstract Nitrogen (N) and potassium (K) in potato crop planting synergistically increase tuber yield, but there are no studies on this interaction in sidedressing. In two experiments with ‘Atlantic’ potato combinations of four N rates (0, 50, 100, and 150 kg ha-1) with four K2O rates (0, 100, 200, and 300 kg ha-1) were applied in sidedressing in a 4×4 factorial scheme with three replications in a completely ran...
Arabica coffee response to rates of coated and conventional urea in sandy soil
Abranches,Jorge Luiz; Soratto,Rogério Peres; Perdoná,Marcos José; Parecido,Renan JoséAbstract: The objective of this work was to evaluate the growth, relative chlorophyll index and nitrogen concentrations in leaves, and the grain yield of arabica coffee (Coffea arabica) fertilized with rates of N as coated and conventional urea, in a sandy soil under rainfed conditions. The experiment was carried out over three crop years, using 'Mundo Novo IAC 388-17-1' coffee, in a randomized complete block d...
Nitrogen management of forage grasses for nutrition, seed production, and nutri...
Catuchi,Tiago Aranda; Soratto,Rogério Peres; Francisquini Júnior,Amarildo; Guidorizzi,Fernando Vieira Costa; Tiritan,Carlos SérgioAbstract: The objective of this work was to evaluate the nutrition, accumulation of nutrients in residual straw, pure seed yield, and seed quality of the tropical forage grasses 'Mombaça' and 'Xaraés' subjected to topdressing with nitrogen fertilizer management. Field experiments were carried out in the municipalities of Rancharia and Presidente Prudente, in the state of São Paulo, Brazil. The treatments includ...
Foliar and topdressing application of nitrogen to the common bean crop
Kotz-Gurgacz,Tailene Elisa; Soratto,Rogério Peres; Guidorizzi,Fernando Vieira CostaAbstract: The objective of this work was to evaluate the effect of applying N sources to leaves and N rates to the soil on the growth, N uptake, and grain and crude protein yields of the common bean (Phaseolus vulgaris) crop. Three experiments - two irrigated and one rainfed - were conducted during the 2012/2013 agricultural season, in a randomized complete block design with four replicates. The treatments cons...
Nutrient Uptake and Removal by Potato Cultivars as Affected by Phosphate Fertil...
Fernandes,Adalton Mazetti; Soratto,Rogério Peres; Souza,Emerson de Freitas Cordova de; Job,André Luiz GomesABSTRACT Studies in the past decades have focused on how tuber yield of potato grown on different types of soil is affected by phosphate fertilizer rates. However, little is known about the effects of phosphorus availability in the soil and of phosphate fertilization on nutrient uptake and removal by the main potato cultivars currently grown in Brazil. Thus, in this study we investigated the influence of P fert...
Criteria for topdressing nitrogen application to common bean using chlorophyll ...
Maia,Suelen Cristina Mendonça; Soratto,Rogério Peres; Liebe,Suzane Maria; Almeida,Adriana Queiroz deAbstract: The objective of this work was to establish the diagnostic leaf and the nitrogen sufficiency index (NSI) values most appropriate to estimate N requirement by the 'Pérola' common bean (Phaseolus vulgaris), based on chlorophyll meter monitoring. The diagnostic leaf was defined in an experiment with five N rates, and up to four sampling dates of the diagnostic leaves were evaluated (first, second, and th...
Seletividade e eficiência de herbicidas no controle de plantas daninhas na cult...
Mancuso,Mauricio Antonio Cuzato; Aires,Bruno Corrêa; Negrisoli,Eduardo; Corrêa,Marcelo Rocha; Soratto,Rogério PeresRESUMO A falta de conhecimento sobre herbicidas para o manejo químico das plantas daninhas é uma das principais limitações para a expansão da cultura do feijão-caupi, na região centro-sul do Brasil. Com o objetivo de avaliar a seletividade e a eficiência de herbicidas na cultura do feijão-caupi, foram conduzidos dois experimentos de campo, um com a cultivar BRS Guariba e, outro, com BRS Novaera, em Botucatu-SP....