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POTENTIAL PASTURE PRODUCTION IN THE UPLANDS OF WALES
Author(s) -
Munro J. M. M.
Publication year - 1973
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1973.tb00722.x
Subject(s) - pasture , grassland , environmental science , vegetation (pathology) , vegetation cover , physical geography , diurnal temperature variation , hydrology (agriculture) , geography , forestry , agronomy , land use , ecology , geology , meteorology , biology , medicine , geotechnical engineering , pathology
A comprehensive study of the climatic, soil and vegetation restraints on grassland production in the hill areas of Britain is an essential preliminary stage in land use planning for those areas. Climatic data, recorded continuously at four centres in mid‐Wales, emphasize the extent of altitudinal, topographic, seasonal and diurnal variation in zones with improvement potential. Annual solar energy income is negatively correlated with rainfall and cloud cover. Under wet conditions in the western hills, mean daily solar radiation during 1966–69 decreased by 15% between two centres at 30 and 305 m (103 and 1100 ft) 0.D. from 9.92 MJ/m 2 to 7–07 MJ/m 2 = (204 to 169 cal/cm 2 ). Radiation receipts in the drier eastern uplands at 305 m (1000 ft) were as high between May and August as in the western lowlands, but winter temperatures were considerably lower. Comparisons are made with conditions in other upland areas of Britain.