Mara Cristina Pessôa da Cruz

• Abstract

  In crop year 2011-2012 (year 1) a field experiment was initiated with the objectives: a) to evaluate net N mineralization rate in area fertilized with manure and planted with maize, using laboratory and in situ methods; b) to correlate N mineralized with N absorbed by maize plants and its production. In the first year of the experiment a support scholarship of a PhD was obtained from FAP…

  Laboratory and in situ methods to evaluate nitrogen mineralization of cattle manure, AP.R

• Abstract

  One of the alternatives for promoting greater sustainability of agricultural production systems consists of the consortium of commercial crops with cover crops, which have the potential to improve the chemical attributes of the soil and, consequently, crop productivity. The objective of this work is to evaluate the effect of the arabica coffee consortium with cover crops in the particulat…

  Carbon and nitrogen particulates in soil cultivated with coffee intercropped with cover crops, BP.IC

• Abstract

  In research on soil management, organic matter is often fractionated, with emphasis on the labile fraction, which is the most sensitive to changes in management and the most directly associated with nutrient cycling. This sensitivity allows us to save time to recommend the best strategies or propose adjustments in management to increase soil quality and sustainability of production system…

  Soil carbon fractions and mineralizable nitrogen in a crop-livestock system, BP.IC

• Abstract

  In areas fertilized with vinasse, the total amounts of N applied are relevant, but in general it is not known how much N is available, neither the transformations that it causes in the N of the soil. It is only known that there is a need to complement N doses for sugarcane with industrial fertilizers. In vinasse, N predominates in organic form and needs to be mineralized to be absorbed by…

  Nitrogen mineralization in soils fertilized with vinasse, BP.IC

(Only some records are available in English at this moment)

• Abstract

  From the knowledge of the forms of nitrogen in soils and their transformations is possible to evaluate the contribution of organic forms for the N available to plants. It is intended, with this project, to assess the forms of organic N in soils and correlate it with the potentially mineralizable nitrogen (N0) and the amounts of N accumulated in maize plants. The fractions of N will be det…

  Fractions of organic nitrogen and relations with the potentially mineralizable nitrogen of soils, BE.EP.DR