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| The experiment's goal is to study the interaction between nutrient availability and plant density over the production and allocation of biomass, nutrition and wood quality of homogenous populations of balsa wood ( Ochroma pyramidale ) Status: Completed Start date: Thu Sep 01 00:00:00 GMT-03:00 2011 |
| The growing biofuel industry generates by-products that have shown promise as energy and protein feeds in ruminant diets. The objective of this project was to determine the effects of by-products of biodiesel production, obtained from different sources of oilseeds, on the in vitro degradability of nutrients, in vitro ruminal fermentation and methane gas production. Palisadegrass ( Brachiaria brizantha) was used as a model. Its isolated incubation was considered as a contro ... Status: Completed Start date: Wed Aug 01 00:00:00 GMT-03:00 2007 |
| Status: Completed Start date: Wed Oct 01 00:00:00 GMT-03:00 2014 |
| Currently, Brazil is the fourth largest consumer of fertilizers in the entire world; on average, the fertilizers may represent from 25 to 40% of the variable cost of the most important agricultural production systems in the country. One of the main cost variables is the fact that great quantities of applied nutrients via fertilizers are lost through volatilization and leaching. Thusly, methods of nutrient fixation which allow their extended-release in the soil might contribute to a more rational Status: Completed Start date: Sun Nov 01 00:00:00 GMT-03:00 2009 |
| Fine-texture soils in Brazil are generally deemed to have low agricultural potential. Due to low levels of clay and organic matter, they usually present low nutrient and water retention capacity, and, when poorly managed, may produce negative impacts associated with high risks of groundwater contamination by nutrients and other chemical pollutants, or with potential erosion when directly exposed to rain. Status: Completed Start date: Mon Oct 01 00:00:00 GMT-03:00 2012 |
| In the ethanol manufacturing process, the plants demand a large amount of biomass for burning and heat generation, consequently generating a significant amount of ash. Naturally, this residual material needs to have an adequate final destination, in order to avoid polluting the environment and also, to take advantage of the nutrients contained in the ashes. The composition of the ashes varies greatly, as it depends on the quality of the wood and also on the operating conditions of the boilers. A Status: In progress Start date: Sat Oct 01 00:00:00 GMT-03:00 2022 |
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The chestnut PPP Project sought to evaluate aspects related to the productivity of Brazil nuts and Brazil nut trees in the southern region of the state of Amapá. Based on these aspects, subsidies were generated for the formulation of plans for the sustainable use of the species, as well as a management plan for the Rio Cajari Extractive Reserve (RESEX Cajari) was implemented. The extractivism activity in the reserve is mainly characterized by the extraction of Brazil nuts, therefore, ...Status: Completed Start date: Tue Dec 01 00:00:00 GMT-03:00 2009 |
| The project aimed to study the use of crude glycerin produced by biodiesel plants as feed for dairy cows as an alternative to reduce the use of maize, an energy source with increasingly higher international prices, and thus increase the sustainability of dairy production. Research work carried out in other countries suggests that glycerol is the main component of crude glycerin, an energetic nutrient efficiently used by ruminants. . Thus, this project considered three main strategies to address Status: Completed Start date: Wed Apr 01 00:00:00 GMT-03:00 2009 |
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Agriculture in Brazil is a means for promoting significant socioeconomic sustainable progress. However, the productivity of cereal crops such as maize, rice, wheat and sorghum is below their potential. The low availability of phosphorus (P) and inadequate fertilization are some of the major challenges of modern agriculture. In tropical soil, the phosphorus is carried out by adding high dosages of water-soluble phosphates, since most of the added fertilizer becomes unavailable because of fixat ...Status: Completed Start date: Mon Oct 01 00:00:00 GMT-03:00 2012 |
| Silvopastoral systems may be an option to prevent grassland degradation because of the potential to control erosion and the ability of some tree species to add nitrogen and other nutrients to pasture, improving soil fertility. In view of this potential, in-depth evaluations of the soil and plant components of these systems are critical. The objective of this project was to verify the effect of trees on soil quality (fertility, biomass and microbial activity) and to evaluate the dry matter produc Status: Completed Start date: Thu Mar 01 00:00:00 GMT-03:00 2007 |