作者: R. Phillips
DOI: 10.1017/S0021859600046852
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摘要: 1. Differences in cattle population (4 June returns) and average body size of fat (data from the collecting centres) have been illustrated for three counties (Cardiganshire, Carmarthenshire Pembrokeshire) constituting this region. They indicate superiority Pembrokeshire. 2. The six westerly areas Pembrokeshire produce heaviest better grading. It has a higher proportion steers to heifers than rest 3. statistical analysis data made it possible partition region into four main groups centres, which show significant differences cattle. 4. group 1 demonstrated relation ( ) seasonally deliveries, b percentage grading c live weights. 5. These are examined greater detail by comparisons deliveries Pembroke Llandilo centres. that is superior weights, heifers. 6. ungraded also examined, results same trends within as graded 7. explanation variations or ecology beef production discussed light Ashton's (1930) suggestions between different breeds mainly due calcium phosphorus content soil. 8. conclusion drawn climate dominate whole picture, because effect rainfall on leaching soil erosion, well quality harvested fodders, temperature length growing season beneficial influence sunshine both grass hay.