Consulta: creatorFacets:"Meda,Anderson R."
Registros recuperados: 4
Data/hora: 05/06/2024 10:02:34

Evaluation of oat extracts on the efficiency of lime in soil
Provedor de dados: 52
Autores: Cassiolato,Marcelo E.; Meda,Anderson R.; Pavan,Marcos A.; Miyazawa,Mário; Oliveira,José C. de.
The low mobility of the soluble components of surface-applied lime, limits their ability to reduce subsoil acidity in variable charge soils. Laboratory experiments were conducted with brazilian Oxisol to evaluate the effect of oat extracts on the mobility of surface applied calcium in form of CaCO3. The following oat cultivars were evaluated: Argentina 5VL3, UPF 90H400-2, IAPAR 61, IA96101-b, SI 83400, EMBRAPA 29, LD 9102, FAPA 1, ER 93247, ER 90148, ER 89144, ER 93152, Alpha 94124, Alpha 94206 and Preta comum. Oat extracts and lime were applied at rates of 10 and 5 Mg ha-1, respectively. Effect of lime without plant extracts on soil acidity was limited in the upper 10 cm of the profile. Lime in the presence of oat extracts increased pH and Ca ex and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Subsoil acidity; Ca-leaching; Plant residue.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000500014

A laboratory method to estimate the efficiency of plant extract to neutralize soil acidity
Provedor de dados: 52
Autores: Cassiolato,Marcelo E.; Miyazawa,Mário; Meda,Anderson R.; Pavan,Marcos A.
Water-soluble plant organic compounds have been proposed to be efficient in alleviating soil acidity. Laboratory methods were evaluated to estimate the efficiency of plant extracts to neutralize soil acidity. Plant samples were dried at 65ºC for 48 h and ground to pass 1 mm sieve. Plant extraction procedure was: transfer 3.0 g of plant sample to a becker, add 150 ml of deionized water, shake for 8 h at 175 rpm and filter. Three laboratory methods were evaluated: sigma (Ca+Mg+K) of the plant extracts; electrical conductivity of the plant extracts and titration of plant extracts with NaOH solution between pH 3 to 7. These methods were compared with the effect of the plant extracts on acid soil chemistry. All laboratory methods were related with soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant residue; Organic acid; Plant alkaline index.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200009

Dolomite lime’s reaction applied on the surface of a sandy soil of the Northwest Paraná, Brazil
Provedor de dados: 52
Autores: Meda,Anderson R.; Pavan,Marcos A.; Cassiolato,Marcelo E.; Miyazawa,Mário.
Low Ca and Mg are serious limitations to crop production in sandy soils of the northwest Paraná, Brazil. Thus soil samples of an Oxisol collected in this region were packed into 30cm long columns. Dolomite lime (2.0, 0.84, 0.30, and &lt; 0.30 mm screen) was added on soil surface, then leached with deionized water. Thereafter, the columns were dismantled and the soil cut into 5cm segments for chemical analysis. Dolomite lime increased pHCaCl2,, KCl-exchangeable Ca and Mg and residual CO3 mostly in the top surface layers. Surface dolomite lime had no effect on pH, Ca, Mg, and CO3 in the leachate, independent on the lime particle size. These results indicated that surface dolomite lime application had no effect on subsoil composition and mostly of the calcium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Liming; Ca and Mg leaching; Subsoil acidity.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200014

Alleviating soil acidity through plant organic compounds
Provedor de dados: 52
Autores: Meda,Anderson R.; Cassiolato,Marcelo E.; Pavan,Marcos A.; Miyazawa,Mário.
A laboratory experiment was conducted to evaluate the effects of water soluble plant extracts on soil acidity. The plant materials were: black oat, oil seed radish, white and blue lupin, gray and dwarf mucuna, Crotalaria spectabilis and C. breviflora, millet, pigeon pea, star grass, mato grosso grass, coffee leaves, sugar cane leaves, rice straw, and wheat straw. Plant extracts were added on soil surface in a PVC soil column at a rate of 1.0 ml min-1. Both soil and drainage water were analyzed for pH, Ca, Al, and K. Plant extracts applied on the soil surface increased soil pH, exchangeable Ca ex and Kex and decreased Al ex. Oil seed radish, black oat, and blue lupin were the best and millet the worst materials to alleviate soil acidity. Oil seed radish...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant residue; Organic material; Leaching.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000200012