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Short communication : Environmental consequences of alternative practices for intensifying crop production

Gregory, P. J. ; Ingram, J. S.I. ; Andersson, R. ; Betts, R. A. ; Brovkin, V. ; Chase, T. N. ; Grace, P. R. ; Gray, A. J. ; Hamilton, N. and Hardy, T. B. , et al. (2002) In Agriculture, Ecosystems and Environment 88(3). p.279-290
Abstract

The increasing global demand for food will be met chiefly by increased intensification of production. For crops, this will be achieved largely by increased yields per area with a smaller contribution from an increased number of crops grown in a seasonal cycle. Production systems show a spectrum of intensification practices characterised by varying methods of site preparation and pest control, and inputs of germplasm, nutrients and water. This paper highlights three main types of intensification (based largely on the quantity and efficiency of use of external inputs) and examines both the on- and off-site environmental consequences of each for soils, water quantity and quality, and climate forcing and regional climate change. The use of... (More)

The increasing global demand for food will be met chiefly by increased intensification of production. For crops, this will be achieved largely by increased yields per area with a smaller contribution from an increased number of crops grown in a seasonal cycle. Production systems show a spectrum of intensification practices characterised by varying methods of site preparation and pest control, and inputs of germplasm, nutrients and water. This paper highlights three main types of intensification (based largely on the quantity and efficiency of use of external inputs) and examines both the on- and off-site environmental consequences of each for soils, water quantity and quality, and climate forcing and regional climate change. The use of low amounts of external inputs is generally regarded as being the most environmentally-benign although this advantage over systems with higher inputs may disappear if the consequences are expressed per unit of product rather than per unit area. The adverse effects of production systems with high external inputs, especially losses of nutrients from fertilisers and manures to water courses and contributions of gases to climate forcing, have been quantified. Future intensification, including the use of improved germplasm via genetic modification, will seek to increase the efficiency of use of added inputs while minimising adverse effects on the environment. However, reducing the loss of nutrients from fertilisers and manures, and increasing the efficiency of water utilisation in crop production, remain considerable challenges.

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publishing date
type
Contribution to journal
publication status
published
keywords
Climate forcing, Environmental degradation, Global change, Intensification
in
Agriculture, Ecosystems and Environment
volume
88
issue
3
pages
12 pages
publisher
Elsevier
external identifiers
  • scopus:18344382140
ISSN
0167-8809
DOI
10.1016/S0167-8809(01)00263-8
language
English
LU publication?
no
id
064cd5a5-de3a-453e-9469-9f7daff06c1b
date added to LUP
2025-09-30 18:46:38
date last changed
2025-10-14 13:04:53
@article{064cd5a5-de3a-453e-9469-9f7daff06c1b,
  abstract     = {{<p>The increasing global demand for food will be met chiefly by increased intensification of production. For crops, this will be achieved largely by increased yields per area with a smaller contribution from an increased number of crops grown in a seasonal cycle. Production systems show a spectrum of intensification practices characterised by varying methods of site preparation and pest control, and inputs of germplasm, nutrients and water. This paper highlights three main types of intensification (based largely on the quantity and efficiency of use of external inputs) and examines both the on- and off-site environmental consequences of each for soils, water quantity and quality, and climate forcing and regional climate change. The use of low amounts of external inputs is generally regarded as being the most environmentally-benign although this advantage over systems with higher inputs may disappear if the consequences are expressed per unit of product rather than per unit area. The adverse effects of production systems with high external inputs, especially losses of nutrients from fertilisers and manures to water courses and contributions of gases to climate forcing, have been quantified. Future intensification, including the use of improved germplasm via genetic modification, will seek to increase the efficiency of use of added inputs while minimising adverse effects on the environment. However, reducing the loss of nutrients from fertilisers and manures, and increasing the efficiency of water utilisation in crop production, remain considerable challenges.</p>}},
  author       = {{Gregory, P. J. and Ingram, J. S.I. and Andersson, R. and Betts, R. A. and Brovkin, V. and Chase, T. N. and Grace, P. R. and Gray, A. J. and Hamilton, N. and Hardy, T. B. and Howden, S. M. and Jenkins, A. and Meybeck, M. and Olsson, M. and Ortiz-Monasterio, I. and Palm, C. A. and Payn, T. W. and Rummukainen, M. and Schulze, R. E. and Thiem, M. and Valentin, C. and Wilkinson, M. J.}},
  issn         = {{0167-8809}},
  keywords     = {{Climate forcing; Environmental degradation; Global change; Intensification}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{279--290}},
  publisher    = {{Elsevier}},
  series       = {{Agriculture, Ecosystems and Environment}},
  title        = {{Short communication : Environmental consequences of alternative practices for intensifying crop production}},
  url          = {{http://dx.doi.org/10.1016/S0167-8809(01)00263-8}},
  doi          = {{10.1016/S0167-8809(01)00263-8}},
  volume       = {{88}},
  year         = {{2002}},
}