Volume 33, Number 6, 2009

Studies with stable isotopes are becoming more common due to the increased safety of operation and quality and reliability of results. However, the use of microplots is required to decrease the costs of such studies. Since microplots are small compared to regular plot areas, the purpose of this study was to investigate whether nutritional data based on microplot samples can adequately represent the whole area, in a comparison of the nutritional status of microplot sugar cane plants at their maximum […]

Soil fertility can be evaluated by several methods, such as field or greenhouse tests with plants. In greenhouse studies with untilled soils the sampling of undisturbed soil cores is difficult. The aim of this study was to propose an equipment for undisturbed soil core sampling of untilled soils for greenhouse studies and test its efficiency. A sampler with a diameter of 200 mm and depth of 300 mm was developed. The soil penetration resistance and density of the soil and […]