搜索结果: 1-7 共查到“农学 Population density”相关记录7条 . 查询时间(0.078 秒)
An assessment of the applicability of dung count to estimate the wild boar population density in a forest environment
accumulation defecation distribution faeces
2015/5/5
Wild boar is a native species in the fauna of the Czech Republic. It is becoming a problematic game
species both in the Czech Republic and in other European countries due to its harmful impacts. So ...
Diminished UV radiation reduces the spread and population density of Macrosiphum euphorbiae (Thomas) [Hemiptera: Aphididae] in lettuce crops
potato aphid UV-absorbing net IPM SADIE life table parameters
2015/3/17
UV-absorbing covers reduce the incidence of injurious insect pests and viruses in protected crops. In the present study, the effect of a UV-absorbing net (Bionet) on the spatio-temporal dynamics of th...
Growth and yield of cassava as influenced by grain cowpea population density in Southeastern Nigeria
Cowpea LAI cassava plant density yield
2011/1/12
The use of some leguminous crops for soil fertility improvement is being promoted for root and tuber crops production in Nigeria. Cowpea has a lot of advantages and is more compatible with cassava tha...
POPULATION DENSITY OF PHYTONOMUS VARIABILIS HRBST. AND PHYTODECTA FORNICATA BRUGG. ON MULTIFOLIOLATE AND TRIFOLIOLATE ALFALFA IN RELATION TO ANATOMICAL CHARACTERISTICS ON THEIR LEAVES
feeding behavior alfalfa weevil Phytodecta fornicata Brugg
2010/12/8
Two alfalfa cultivars - the multifoliolate “Mnogolistna 1” and the trifoliolate “Europe” were investigated for their resistance towards two main alfalfa defoliators Phytonomus variabilis Hrbst., 1795 ...
Influence of population density and season on seed yield and its components in Nigerian sesame genotypes
Heritability genetic advance seed production efficiency
2009/2/20
A field experiment was conducted to assess the impact of three population densities and two seasons on seed yield of 14 genetically diverse Nigerian sesame genotypes. Cultivars 530-6-1, Type A and...
Effect of Population Density and Planting Configuration on Canopy Development and Reproductive Effort in Mungbean (Vigna radiata (L.) Wilczek)
Density configuration leaf area specific leaf mass reproductive effort mungbean
2010/11/8
A field experiment was conducted to determine the influence of population density and planting
arrangement on vegetative and reproductive growth of mungbean. The experiment was conducted with six lev...
Over-wintering of the Colorado potato beetle (Leptinotarsa decemlineata Say) in field conditions and factors affecting its population density in Estonia
Colorado potato beetles overwintering soil type mortality
2010/1/14
The adaptation of Colorado potato beetles (CPB) (Leptinotarsa decemlineata Say) to low temperatures has been the basis for the formation of a local permanent population in Estonia. The number of this ...