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Increment cores were obtained at b.h. from the stems of 300 trees on the margin of the Lake Vyrnwy reservoir, Montgomeryshire, Wales, in 1969, and the...
Read moreSexual reproduction in 9 clones of Eichhornia crassipes from different parts of the world was examined in the glasshouse. Eight of the clones flowered...
Read moreResistance against pesticides is a widespread and increasing problem. The control of pesticide dose and the mixing of pesticides have been proposed as...
Read moreOn flat bog with deep peat where heather (Calluna vulgaris), the principal food of the birds, was scarce application of superphosphate, or ground mine...
Read moreThe great changes in Chinese agriculture during the past 10 years have been accompanied by significant deterioration of the rural environment. Among t...
Read moreTranspiration rates of Douglas-fir trees (Pseudotsuga menziesii) were measured in the field, using tritiated water (HTO) as a tracer for water. Sites ...
Read moreRandom soil samples were used to estimate the number and weight of each species of enchytraeid and lumbricid at fourteen long-established experimental...
Read moreThe results are reported of glasshouse trials in which the interspecific effects of barley, white mustard (Sinapis alba) and wild oats (Avena fatua) g...
Read moreThe size, composition and seasonal and depth-related variations in the soil seed bank of a former chalk grassland ley were determined at monthly inter...
Read moreThe influence of cattle grazing on marked shoots of P. australis was studied on embanked sandflats of the Lauwerszeepolder, N. Netherlands in 1983-86....
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