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There are 8, 238 content items of different types and languages related to administração fundiária on the Land Portal.
Displaying 3145 - 3156 of 5230

Harvest of Natural Shrubs with a Biobaler in Various Environments in Quebec, Ontario and Minnesota

Journal Articles & Books
Dezembro, 2012
Canadá
Estados Unidos

The biobaler is a novel approach to cut woody crops up to 150-mm basal diameter and compress the biomass into round bales. It can be used to harvest short-rotation woody crop plantations such as willow or hybrid poplar. It can also be used to clear wild brush, forest understory, and encroaching small trees to improve land management.

Modelling and quantifying the spatial distribution of post-wildfire ash loads

Journal Articles & Books
Dezembro, 2016
Austrália

Ash is generated in every wildfire, but its eco-hydro-geomorphic effects remain poorly understood and quantified, especially at large spatial scales. Here we present a new method that allows modelling the spatial distribution of ash loads in the post-fire landscape, based on a severe wildfire that burnt ~13600ha of a forested water supply catchment in October 2013 (2013 Hall Road Fire, 100km south-west of Sydney, Australia). Employing an existing spectral ratio-based index, we developed a new spectral index using Landsat 8 satellite imagery: the normalised wildfire ash index (NWAI).

Effect of farmer management strategies on spatial variability of soil fertility and crop nutrient uptake in contrasting agro-ecological zones in Zimbabwe

Journal Articles & Books
Dezembro, 2010
Zimbabwe
África

Variability of soil fertility within, and across farms, poses a major challenge for increasing crop productivity in smallholder systems of sub-Saharan Africa. This study assessed the effect of farmers' resource endowment and nutrient management strategies on variability in soil fertility and plant nutrient uptake between different fields in Gokwe South (ave. rainfall ~650 mm year⁻¹; 16.3 persons km⁻²) and Murewa (ave. rainfall ~850 mm year⁻¹; 44.1 persons km⁻²) districts, Zimbabwe.

Stakeholders’ strategies and multifunctionality : the case of Guadeloupe and Reunion Islands

Journal Articles & Books
Dezembro, 2006
Guadalupe
Reunião
África
Caribe

The multifunctionality of agriculture promoted by the Agriculture Act is difficult to reconcile with the intensive models dominant in Guadeloupe and Reunion. This is made clear by an analysis of the management rules and practices for territorial farming contracts, intended to implement this Act. The difficulty of this reconciliation can also be observed by the impact that the statute’s application has had on its targets — production units. We conducted open or conversation interviews with institutional personnel and with farmers who have signed these contracts.

Can management induced changes in the carbonate system drive soil carbon sequestration? A review with particular focus on Australia

Journal Articles & Books
Dezembro, 2012
Austrália

In many important agricultural regions, soil inorganic carbon (SIC) stocks can rival the amount of carbon found in organic form. Land management practices, including irrigation, fertilization and liming, have the potential to greatly alter the soil inorganic carbon cycle thus creating an important feedback to atmospheric CO₂ concentrations. However, the current literature is less clear regarding the direction and magnitude of this feedback.

Local cultural models of conservation and NGO legitimacy: a comparison across scales

Journal Articles & Books
Dezembro, 2012

In this paper, we examine the extent to which three conservation organisations (one local, one national and one international), working in East Texas, variously integrate local cultural models of conservation and scientific theories into their programmes. We hypothesised that the local level organisation, whose members were primarily from East Texas, would construct conservation programmes that speak to local cultural models of land and conservation, and the non-local organisations, with mandates crafted outside of the region, would actively promote conservation science.

Fertility management and landscape position: farmers' use of nutrient sources in western Niger and possible improvements

Journal Articles & Books
Dezembro, 2003
Níger

Poor millet growth and yields in Niger are commonly attributed to rainfall deficits and low soil nutrient content. Land management by local farmers is done as a function of soil types, crops, and available resources. Farmer management practices in millet fields located on four different landscape positions were studied in a village in western Niger located near the 600 mm isohyet. Average distance from homestead to field was 980 m, with fields in the valley bottom much closer (average 225 m) and fields on the plateau much further (average 2300 m).

Value of Landscapes in Northern Namibia: A System of Intertwined Material and Nonmaterial Services

Journal Articles & Books
Dezembro, 2015
Namíbia

It is increasingly recognized that ecosystems provide varied services that should be considered in land management decisions. One of the challenges in the valuation of landscapes is that they often provide multiple services that combine into one social–ecological system. In this article we show how overlaps of those services can be measured, visualized, and explained. The results from a case study conducted in a rural community in northern Namibia show that in some landscapes, services are intertwined.

Trends in productivity of crops, fallow and rangelands in Southwest Niger: Impact of land use, management and variable rainfall

Journal Articles & Books
Dezembro, 2009
Níger

To document trends in land use and herbaceous production, 71 field sites sampled among cropped fields, fallow fields and rangelands in the Fakara region (Niger) were monitored from 1994 to 2006. The overall trend in land use confirmed the historical increase of the cropped areas since mid 20th century, at an annual rate of 2% from 1994 to 2006. This trend is the result of changes in the relative extent of fields permanently cropped and fields under shifting cultivation, and for the latter, the relative proportion of short (3 years) and long (10 years) duration fallows.

Effects of previous nitrogen addition on chlorine in forest soil, soil solution and biomass

Journal Articles & Books
Dezembro, 2013
Suécia

There is increasing evidence that forests and forest soil contribute to the signature of chlorine composition in water bodies. However, little is known about the potential effects of land management activities on chlorine biogeochemistry. This study examines the effects of previous nitrogen addition on chlorine chemistry in a Pinus sylvestris L. forest located in south-central Sweden (60°00′N, 13°43′E). Repeated addition of nitrogen to study plots over a 20-year period resulted in total additions of 0, 450 and 900� kg� N� ha⁻¹.