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The Relationship between Greenhouse Gas Emissions and the Intensity of Milk Production in Ireland

Department of Biosystems Engineering (Bioresources Modelling Group), Univ. College Dublin, Earlsfort Terrace, Dublin 2, Ireland

View larger version (23K): [in a new window]   Fig. 1. The relationship between (a) TGE/ECM* and (b) TGE/HA* and rate of N fertilizer applied. [REPS farms = triangles (Farms A–D). Conventional farms = squares (Farms E–J)]. *Gradient parameter significant at p < 0.05.

View larger version (23K): [in a new window]   Fig. 2. The relationship between (a) TGE/ECM* and (b) TGE/HA* and concentrates fed. [REPS farms = triangles (Farms A–D). Conventional farms = squares (Farms E–J)]. *Gradient parameter not significant at p > 0.05.

View larger version (21K): [in a new window]   Fig. 3. The relationship between (a) TGE/ECM* and (b) TGE/HA, and stocking density. [REPS farms = triangles (Farms A–D). Conventional farms = squares (Farms E–J)]. *Gradient parameter significant at p < 0.05; Gradient parameter not significant at p > 0.05.

View larger version (20K): [in a new window]   Fig. 4. The relationship between (a) TGE/ECM* and (b) TGE/HA* and area per kg of ECM produced. [REPS farms = pale gray (Farms A–D). Conventional farms = black (Farms E–J)]. *Gradient parameter significant at p < 0.05.

View larger version (23K): [in a new window]   Fig. 5. The relationship between (a) TGE/ECM* and (b) TGE/HA and output per cow. [REPS farms = triangles (Farms A–D). Conventional farms = squares (Farms E–J)]. *Gradient parameter significant at p < 0.05; Gradient parameter not significant at p > 0.05.