Field experiments which consisted of the incubation of soil within polyvinylchloride (PVC) tubes inserted in glass jars previously buried in potato crop rows were conducted in order to measure the contribution of soil organic matter and organic amendments to the N nutrition of the crop. The experiments were carried out in Bragança, NE Portugal, in the summer seasons of 1996–1998. Five treatments including farmyard manure, poultry manure, municipal solid wastes, urea and the control were used. Manures and urea were applied in rates which correspond to 100 kg N/ha. Nitrogen released from soil organic matter and manures was checked through crop N recovered and petiole nitrate concentrations. In the plots of urea treatments 80.1, 68.4 and 98.8 ...
Not AvailableStudy of nitrogen release pattern from organic manures is very essential to ensure nitr...
Interval leaching long-term water-logged incubation and interval leaching long-term aerobic incubati...
A proper management of Mediterranean agro-ecosystems should be aimed at building-up soil organic mat...
The quantification of sidedress N rate from in-season information on crop N nutritional status is ex...
The study was conducted over a 4 year period with the purpose of measuring N mineralization using an...
The manures are usually considered as an important source of nitrogen. However, if they are applied ...
Mestrado em Engenharia do Ambiente - Instituto Superior de AgronomiaWith the objective to predict th...
The aim of a field experiment was to determine foliar urea application in a vegetation period of pot...
Aerobic incubation experiments were conducted in organic surface samples collected from arable soils...
Nitrate leaching to aquifers is a crucial problem in crops with low N use efficiency like potato: an...
Graduation date: 2008As part of a participatory research project, where farmers and Oregon State Uni...
ABSTRACT: A reliable quantification of nitrogen (N) losses by ammonia (NH3) volatilization can contr...
A field crop rotation with a cover crop of hairy vetch (Vicia sativa, L.) and rye (Secale cereale, L...
In the period of 1983-1985, 18 field experiments with potatoes grown for industrial starch productio...
The Nitrogen (N) availability from field-applied poultry manure for crop production is influenced by...
Not AvailableStudy of nitrogen release pattern from organic manures is very essential to ensure nitr...
Interval leaching long-term water-logged incubation and interval leaching long-term aerobic incubati...
A proper management of Mediterranean agro-ecosystems should be aimed at building-up soil organic mat...
The quantification of sidedress N rate from in-season information on crop N nutritional status is ex...
The study was conducted over a 4 year period with the purpose of measuring N mineralization using an...
The manures are usually considered as an important source of nitrogen. However, if they are applied ...
Mestrado em Engenharia do Ambiente - Instituto Superior de AgronomiaWith the objective to predict th...
The aim of a field experiment was to determine foliar urea application in a vegetation period of pot...
Aerobic incubation experiments were conducted in organic surface samples collected from arable soils...
Nitrate leaching to aquifers is a crucial problem in crops with low N use efficiency like potato: an...
Graduation date: 2008As part of a participatory research project, where farmers and Oregon State Uni...
ABSTRACT: A reliable quantification of nitrogen (N) losses by ammonia (NH3) volatilization can contr...
A field crop rotation with a cover crop of hairy vetch (Vicia sativa, L.) and rye (Secale cereale, L...
In the period of 1983-1985, 18 field experiments with potatoes grown for industrial starch productio...
The Nitrogen (N) availability from field-applied poultry manure for crop production is influenced by...
Not AvailableStudy of nitrogen release pattern from organic manures is very essential to ensure nitr...
Interval leaching long-term water-logged incubation and interval leaching long-term aerobic incubati...
A proper management of Mediterranean agro-ecosystems should be aimed at building-up soil organic mat...