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Trials in California with P. ponderosa seedlings planted in hand-thinned plots of A. patula (proportions approx. 0:100, 25:75, 50:50, 75:25, 100:0) su...
Read moreFor 5 plantation stands (age 7-56 yr) in the Kalimpong forest district in the hills of Darjeeling, data are presented on the age transition of nodules...
Read moreFoliar nutrient relations of 13 non-N-fixing and 14 potentially N-fixing broadleaves at 5 savanna woodland sites were compared with data on soil nutri...
Read moreNumbers and activities of animals observed on areas of each vegetation type on fixed transects were recorded at 2-h intervals for 24 h twice monthly f...
Read moreThe relationship between cereal preference and rate of energy intake was studied for the mallard and 4 types of cereal grain. In a field experiment at...
Read moreThere is a linear relationship between the timing of the spring migration of both Sitobion avenae and S. fragariae and latitude, due to the effect of ...
Read moreAn analysis of predation of cereal aphids (Sitobion avenae and Metopolophium dirhodum) by larvae of Episyrphus balteatus is described. Field data on t...
Read moreTo predict the long-term epidemiological consequences of onchocerciasis vector control an entomological index is needed which is independent of parasi...
Read moreIn field trials in the UK, different levels of attack by hymenopterous parasitoids occurred in stem-boring larval Diptera (including Oscinella frit) i...
Read moreAbove-ground arthropod populations in field plots of barley receiving no nitrogen (barley 0), barley receiving 120 kg nitrogen per hectare per year (b...
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