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Measurements were made of the changes in reserves of plant nutrients in leaf litter and surface soil that occur when tropical evergreen forests and ma...

A technique is described incorporating a point-quadrat method, computed tomography and several photographs taken from various positions at ground leve...

Measurements were made to determine the balance between photosynthesis, animal intake and the losses of matter in swards maintained by 'lenient' conti...

Swedes cv. Victory and sugar beet cv. Klein E were grown at 2 sites in S.E. England and protected by a N.-S. screen with 50% permeability; the height ...

Large areas of agricultural land around the world are degraded as a consequence of dominance by bracken fern (Pteridium spp.). Tropical production sys...

In the above area it is common practice to grow sorghum and other crops under trees of A. albida, which is leafless during the rainy season. Crop yiel...

Samples taken at Cedar Creek, Minnesota, showed that the above-ground parts of cattail [Typha angustifolia] and maize ecosystems contained much the sa...

Effects of total solar radiation and temperature on the early vegetative growth of Helianthus annuus cv. Polestar and Phaseolus vulgaris cv. Canadian ...

In the above area it is common practice to grow sorghum and other crops under trees of A. albida, which is leafless during the rainy season. Crop yiel...

Data for 1976 to 1983 from a 120-yr-old Q. petraea stand at Fontainebleu forest, France, were used to derive a model for predicting date of budburst a...