Influence of ZnO Nanoparticles and a Non-Nano ZnO on Survival and Reproduction of Earthworm and Springtail in Tropical Natural Soil
Micheli Lucia Alves, Luís Carlos Iuñes de Oliveira Filho 
, Patrícia Nogueira, André Junior Ogliari, Márcio Antônio Fiori , Dilmar Baretta , [...]
13/May/2019
ABSTRACT: In recent years, various studies and development using nanoparticles (NPs) have been carried out in the most diverse areas of knowledge. Although nanomaterials are widely employed by many sectors and some may have a fertilizing potential, little is known about their effects on the environment. This study aimed to evaluate the effect of applying, in tropical natural soil, different contents of nanoparticles of zinc oxide (NPs-ZnO) and non-nano zinc oxide (ZnO) on soil pH and on the survival and […]
Organic fertilization of potato with manure and, or, Crotalaria juncea. II – Soil N, P, and K availability throughout the growing season
01/Feb/2007
Soil fertility levels in the Agreste region, state of Paraíba, Brazil are generally low. Usually, animal manure is applied to soils to supply agricultural crops with nutrients. However, depending on the quality of the manure applied, incorporation can lead to soil nitrogen immobilization in the beginning of the growing season. It was hypothesized that planting and incorporating crotalaria (Crotalaria juncea) together with animal manure could synchronize the nutrient mineralization pattern more specifically with crop demand. In 2003, field and green-house […]
Organic fertilization of potato with manure and, or, Crotalaria juncea. I – Long term plant productivity and soil nutrient stocks
01/Feb/2007
Potato (Solanum tuberosum L.) is an important cash crop in the semi-arid region of Paraíba, Brazil. However, potato productivity is limited by low soil fertility and the limited and highly variable precipitation pattern of this region. Animal manure is the main nutrient source for soil fertility amelioration, but farm manure available is usually not enough to fertilize crops. A cover crop could decrease the demand for animal manure. The characteristics of Crotalaria (Crotalaria juncea L.) recommend it as green manure. […]
Mineralogy, morphology and microscopic analysis of soils of the cerrado biome
01/Aug/2004
The macro and micromorphological characteristics of the surface and subsurface diagnostic horizons of Oxisols and Quartzipsamments of the South American and Velhas geomorphic surfaces were analyzed in profiles under native vegetation cover, in order to establish a reference for future comparisons with similar areas under ongoing human intervention. The soils in their respective subregions and geomorphic surfaces were classified in three groups: Group 1: hypo to mesoferric, clayey to very clayey soils; Group 2: hypoferric; sandy to sandy loam soils, and Group 3: […]