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Photocells were traversed at 6 canopy heights in a 15-yr-old plantation in North Carolina. When incident radiation was predominantly direct-beam, a bi...

In connexion with studies of insect pests and vectors of disease in Cocoa plantations, an investigation was made of the fungus pathogens of ants and o...

Selection of shade tree species for agroforestry systems must take the complexity of these systems into account. Tree species selection should maximiz...

A. albida, which grows along seasonal watercourses in this region, flushes and flowers at the beginning of the dry season and is leafless during the r...

In a cocoa plantation in Costa Rica, T. jaty was a common visitor to the flowers; on 70% of observed visits, the bees collected pollen. However, fruit...

Seed germination in Agrostis capillaris, Holcus lanatus, Poa trivialis, Cynosurus cristatus and Festuca rubra was investigated in the dark at temp. ra...

Shallow lakes are important components of the biosphere, but they are also highly vulnerable to damage from human activities in their catchments, such...

Analysis of weather data for 20 years indicated that toxicity was related to low sunlight hours, and shading experiments confirmed this belief. Round ...

Wheat cv. Concorde, Chenopodium album, Agropyron repens [Elymus repens] and Spergula arvensis were grown in pure stands and in mixtures of weeds with ...