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| Caires,Eduardo Fávero; Barth,Gabriel; Garbuio,Fernando José; Churka,Susana. |
| The effects of soil chemical changes on soybean root growth, mineral nutrition and grain yield, as a result of surface application of lime under no-till (NT), are still under discussion. A field trial was carried out on a loamy dystrophic Typic Hapludox at Ponta Grossa, Paraná State, Brazil, using a completely randomized block design with three replicates, in a split-plot experiment. The main plots received four dolomitic lime rates applied on the surface (0, 2, 4, and 6 Mg ha-1) in July 1993. In the subplots, two dolomitic lime rates were reapplied on the surface (0 and 3 Mg ha-1) in June 2000. After nine years, liming increased pH, exchangeable Ca2+ and reduced exchangeable Al3+ as well as soil Al3+ saturation down to a 60 cm depth. Re-liming, after two... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merrill; Acidity; Subsoil; Root system; Nutrient. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000500013 |
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| Caires,Eduardo Fávero; Corrêa,José Cristovão Leal; Churka,Susana; Barth,Gabriel; Garbuio,Fernando José. |
| Crop root growth and grain yield can be affected by chemical modifications in the soil profile due to surface lime application. A field trial was carried out on a loamy dystrophic Typic Hapludox at Ponta Grossa, State of Paraná, Brazil, to evaluate root growth and grain yield of wheat (Triticum aestivum L. cv. CD 104, moderately susceptible to Al), about 10 years after surface liming (0, 2, 4, and 6 Mg ha-1) and three years after surface re-liming (0 and 3 Mg ha-1), in a long-term no-till cultivation system. Soil acidity limited wheat root growth and yield severely, probably as a result of extended water deficits during the vegetative stage. Surface liming caused increases up to 66% in the root growth (0-60 cm) and up to 140% in the grain yield. Root... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L.; Dolomitic lime; Aluminum; Calcium. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500013 |
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| Caires,Eduardo Fávero; Maschietto,Evandro Henrique Gonçalves; Garbuio,Fernando José; Churka,Susana; Joris,Hélio Antonio Wood. |
| The conditions in which a favorable response to a gypsum application can be expected on crop yields are not clear. A 3-year field trial was carried out to evaluate the effects of gypsum application on soil chemical attributes and nutrition and yield of corn (Zea mays L.) and soybean (Glycine max L. Merrill) on a clayey Typic Hapludox of high fertility and low acidity under no-till in Guarapuava, Parana State, Brazil. Treatments were arranged in a randomized complete block design with four replications, and consisted of gypsum application on the soil surface at 4, 8, and 12 Mg ha-1. Gypsum application increased the P content in the soil most superficial layer (0.0 - 0.1 m) and also the exchangeable Ca and S-SO4(2-) contents and the Ca/Mg ratio in the soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Glycine max; Brazil; Phosphogypsum; Calcium; Sulfur. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200011 |
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| Caires,Eduardo Fávero; Churka,Susana; Garbuio,Fernando José; Ferrari,Roseli Aparecida; Morgano,Marcelo Antonio. |
| Effects of lime and gypsum applications on the quality of soybeans grown under no-till (NT) are not well defined yet. A field trial established in 1998 on a dystrophic clayey Rhodic Hapludox, at Ponta Grossa, State of Paraná, Brazil, evaluated grain yield and soybean quality based on oil, protein and nutrient content, after lime and gypsum applications under NT, in a randomized complete block design (n = 3), split-plot experiment. In the main plots, the treatments with dolomitic lime were: control (no lime), split application of lime on the surface (three yearly applications of 1.5 Mg ha¹), surface lime (4.5 Mg ha¹), and incorporated lime (4.5 Mg ha¹). Subplots received four different rates of gypsum: 0, 3, 6, and 9 Mg ha-1. The soybean crop was evaluated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merrill; Soil acidity; Oil; Protein; Nutrient. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000400008 |
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