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K. Tyson ; D. Scholefield ; S. Jarvis ; A. Stone | 1997Annual liveweight gain of beef cattle (steers) grazing grass pasture fertilized with 200 kg N/ha was compared over a period of 7 years (1989-95) with that of steers grazing grass/white clover pasture given no artificial N fertilizer at North Wyk[...]
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D. Hatch ; S. Jarvis ; R. Parkinson | 1998An improved method is described for incubating intact soil cores in the field, which permits concurrent measurement of net mineralization, nitrification, denitrification and leaching. Cores were enclosed in PVC tubes with minimal disturbance to [...]
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D. Hatch, - Editeur scientifique ; D. Chadwick, - Editeur scientifique ; S. Jarvis, - Editeur scientifique ; J. Roker, - Editeur scientifique | Wageningen, Pays-Bas : Wageningen Academic Publishers | 2004
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S. Jarvis ; D. Hatch ; B. Pain ; J. Klarenbeek | 1994L'impact des boues d'élevage sur les pertes par dénitrification et l'émission de N2O ont été vérifiés sur un sol tourbeux aux Pays-Bas. Les boues ont été épandues soit de manière conventionnelle, soit diluées 1:3 ou acidifiées à l'acide nitrique[...]
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S. Jarvis | 1996N research effort has undergone major changes over recent decades with changing emphasis because of environmental problems and issues. This driving force, coupled with a universal desire to improve N-use efficiency, appreciation of the importanc[...]
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O. Oenema ; G. Velthof ; S. Yamulki ; S. Jarvis | 1997Grazing animals on managed pastures and rangelands have been identified recently as significant contributors to the global N2O budget. This paper summarizes relevant literature data on N2O emissions from dung, urine and grazed grassland, and pro[...]
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P. De Clercq ; A. Gertsis ; G. Hofman ; S. Jarvis ; J. Neeteson | Netherlands : Wagening Pers | 2001Continued intensification of agricultural production over the last decades has had detrimental side effects on the environment. This book describes the pressure on the environment from nutrient emissions in the EU Member States, Norway and Switz[...]
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The influence of organic nitrogen mineralization on the management of agricultural systems in the UK
M. Shepherd ; E. Stockdale ; S. Jarvis | 1996The understanding of nitrogen mineralization is central to providing good advice to ensure that nitrogen (N), from whatever source, is utilized by crops as efficiently as possible to minimize pollution. We have reviewed how mineralization is acc[...]
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D. Barraclough ; S. Jarvis ; G. Davies ; J. Williams | 1992
