BDPA - Bases de Dados da Pesquisa Agropecuária Embrapa
 






Registro Completo
Biblioteca(s):  Embrapa Solos.
Data corrente:  22/11/2002
Data da última atualização:  12/11/2024
Autoria:  LEMOS, P. de O. e C.
Afiliação:  PETEZVAL DE OLIVEIRA E CRUZ LEMOS, CNEPA/IQA.
Título:  Soil crusting and some factors affecting it.
Ano de publicação:  1956
Fonte/Imprenta:  1956.
Páginas:  74 f.
Idioma:  Inglês
Notas:  Thesis (M.S.) - North Carolina State University, Raleigh.
Conteúdo:  A study was made of some factors affecting soil crusting in an attempt to expand previous work and to contribute to our knowledge of the physical conditions affecting plant growth. The interrelationships of some physical properties of natural soil crusts and the underlying soils were collected from artificial plots (concrete tanks, 4 x 4 feet) on the old Central Experiment Station Farm at Raleigh. The tanks contained the A and B horizons of five different soils: Cecil, White Store, Mayodan, Georgeville and Bladen. These were placed in the tanks five years previously. The soil properties studied were bulk density, mechanical analysis and aggregate analysis. An increase in bulk density was the main distinguishing characteristic of the crusts. Very small differences were found in mechanical composition of the crusts and underlying soils. The ability of the soil to form hard crusts was determined by the modulus of rupture. A normal procedure was described and variations simulating natural conditions, were introduced to study several factors believed to affect the tensile strength of the soil. The effect of the moisture content of soil briquets, the use of different moisture contents in briquet preparation, the influence of temperature of drying, the effect of successive cycles of wetting and drying and the influence of soil compaction by natural rainfall were investigated and discussed. The influence of certain soil characteristics on the magnitude of the modulus of rupture was ... Mostrar Tudo
Thesagro:  Briquete; Solo.
Thesaurus Nal:  Briquettes; Soil density.
Categoria do assunto:  P Recursos Naturais, Ciências Ambientais e da Terra
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Solos (CNPS)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status URL
CNPS4730 - 1UPCTS - PPTS 1956.00001LEM1997.02717
Voltar
Nenhum registro encontrado para a expressão de busca informada.
Nenhum registro encontrado para a expressão de busca informada.
 
 

Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área Restrita

Embrapa Agricultura Digital
Av. André Tosello, 209 - Barão Geraldo
Caixa Postal 6041- 13083-886 - Campinas, SP
SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional