New remote sensing data on vegetation cover and restoration opportunities bring hope to the Brazilian Atlantic Forest, one of hottest 36 global biodiversity hotspots. Available estimates remaining in biome currently range from 11% 16%. However, our new land-cover map, prepared at highest resolution ever (5 m), reveals a current 28%, or 32 million hectares (Mha) native vegetation. Simultaneously, we found 7.2 Mha degraded riparian areas, which 5.2 least must be restored before 2038 by...

Providing food and other products to a growing human population while safeguarding natural ecosystems the provision of their services is significant scientific, social political challenge. With demand likely double over next four decades, anthropization already driving climate change principal force behind species extinction, among environmental impacts. The sustainable intensification production on current agricultural lands has been suggested as key solution competition for land between...

This study evaluated the effects of climate change on sugarcane yield, water use efficiency, and irrigation needs in southern Brazil, based downscaled outputs two general circulation models (PRECIS CSIRO) a growth model. For three harvest cycles every year, DSSAT/CANEGRO model was used to simulate baseline four future scenarios for stalk yield 2050s. The calibrated main cultivar currently grown Brazil five field experiments under several soil conditions. sensitivity simulated fresh mass...

A partir das indicações do último relatório IPCC (International Pannel of Climatic Change), foram feitas várias simulações e avaliados os impactos que um aumento na temperatura média ar de 1ºC, 3ºC 5,8ºC incremento 15% precipitação pluvial teriam potencialidade da cafeicultura brasileira, definida pelo atual zoneamento agroclimático café (Coffea arábica L.) nos Estados Goiás, Minas Gerais, São Paulo Paraná. Os resultados indicaram uma redução área apta para a cultura superior 95% em Gerais...

Abstract. In this paper we calculated soil carbon stocks in Brazil studying 17 paired sites where were determined native vegetation, pastures and crop-livestock systems (CPS), other regional samplings encompassing more than 100 pasture soils, from 6.58 to 31.53° S, involving three major Brazilian biomes: Cerrado, Atlantic Forest, the Pampa. The average vegetation at 10, 30 60 cm depth equal approximately 29, 64, 92 Mg ha−1, respectively. sites, losses of 7.5 ha−1 11.6 CPS observed 10 depths,...

Abstract. In this paper, soil carbon, nitrogen and phosphorus concentrations stocks were investigated in agricultural natural areas 17 plot-level paired sites a regional survey encompassing more than 100 pasture soils the sites, elemental determined native vegetation (forests savannas), pastures crop–livestock systems (CPSs). Nutrient calculated for depth intervals 0–10, 0–30, 0–60 cm 0–30 by sum obtained each sampling (0–5, 5–10, 10–20, 20–30, 30–40, 40–60 cm). Overall, there significant...

Rio Doce watershed has centuries of land degradation and it was the main victim worst environmental disaster in Brazil's history. This process deforestation soil erosion could be significantly mitigated if compliance to new Brazilian Native Vegetation Protection Law (NVPL) would ensured. Here, we show how percentage forest kept areas permanent preservation (APP) required by NVPL drives overall resilience resistance entire contributes national restoration commitments. We used water quality as...

Abstract This study represents part of an EEC research programme to monitor crop water conditions during the south Saharan rainy season using satellite data. Primarily focused on Senegalese area, it was mainly performed Meteosat daytime thermal infrared The purpose establish a relationship between satellite-derived land surface temperatures (Ts ) and actual evapotranspiration (ET). After preliminary based data from 1979 1983, emphasis put summers 1984 1985. About thirty dates were selected...

The aim of this study was to model, based on the overall distribution extreme values, probability occurrence a particular level annual maximum daily rainfall in three Brazilian regions (Midwest, Southeast and South) their behavior over past 71 years. parameters general values were estimated by likelihood method. Mann–Kendall test showed that there is positive trend data series. non-stationarity rejected augmented Dickey–Fuller supporting use density function value describe rainfall....

O objetivo deste trabalho foi identificar, no Brasil, regiões homogêneas quanto à distribuição de probabilidades chuva e assim contribuir para estudos riscos climáticos na agricultura. As foram delimitadas mediante aplicação da análise agrupamento hierárquica, com variáveis classificatórias definidas pela proporção pêntadas secas por medidas posição, escala forma das distribuições freqüências quantidade chuva. A permitiu identificar 25 zonas pluviometricamente em todo o território brasileiro.

The objective of this work was to evaluate the effect temperature increase forecasted by Intergovernmental Panel on Climate Change (IPCC) agricultural zoning cotton production in Brazil. Northeastern region showed highest decrease low-risk area for cultivation due projected increase. This Brazilian Northeast may from 83 million ha 2010 approximately 71 2040, which means 15% reduction 30 years. Southeastern and Center-Western regions had small areas suitable until while Northern no these...

ABSTRACT Finding pathways to more sustainable agriculture and resource use remains the most pressing challenge for Amazonian countries. Characterizing recent changes in structure types of agrarian production systems, this review identifies responses deal with challenges opportunities promote extraction economies Amazon. While regional rest on a rich diversity producers, knowledge, expansion agribusiness enterprises has come dominate distribution subsidies, institutional support, logistical...

Abstract If mean temperature increases, in accordance with Intergovernmental Panel on Climate Change (IPCC) projections and adaptations and/or genetic modifications are not considered, suitable areas for farming corn ( Zea mays ) coffee Coffea arabica will decrease the state of Sao Paulo (Brazil). Further, increases precipitation be enough to ameliorate impacts associated temperatures. Suitability grain production more rapidly regions sandy soils than clay or medium soils, as increases. The...

O objetivo deste trabalho é comparar três interpoladores univariados: inverso do quadrado da distância, curvatura mínima e krigagem ordinária usando observações de precipitação pluvial média anual 1.027 postos pluviométricos abrangendo todo o Estado São Paulo, representando área 248.808,8 km² (2,91% território nacional), no período 1957 a 1997. Os mapas variabilidade espacial não apresentaram grandes diferenças visuais; entretanto, quando estatística médio erro foi calculada para cada...

A conceptual framework for crop production efficiency was derived using thermodynamic concept, in order to generate a tool performance evaluation of agricultural systems and quantify the interference determining factors on this performance. In Thermodynamics, is ratio between output input energy. To establish relationship systems, it assumed that energy represented by attainable yield, as predicted through simulation models based environmental variables. The method FAO's agroecological zones...

Abstract Modeling by multiple enchained imputation is an area of growing importance. However, its models and methods are frequently developed for specific applications. In this study the model was used to estimate daily rainfall data. Daily precipitation records from several meteorological stations were used, obtained system AGRITEMPO two homogenous climatic zones. The values dates (Jan. 20th 2005 May 2nd 2005) using compared with geo-statistics techniques ordinary Kriging Co-kriging...

Abstract. In this paper we calculated soil carbon stocks in Brazil using 17 paired sites where were determined native vegetation, pastures and crop-livestock systems (CPS), other regional samplings encompassing more than 100 pasture soils, from 6.58° S to 31.53° S, involving three major Brazilian biomes: Cerrado, Atlantic Forest, the Pampa. The average vegetation at 10 30 cm depth equal approximately 33 65 Mg ha−1, respectively. sites, losses of 7.5 ha−1 11.9 CPS observed averages, similar...