Ambit determination method in estimating rice plant population density

A cokriging method for estimating population density in urban areas

Population information is typically available for analysis in aggregate socioeconomic reporting zones, such as census blocks in the United States and enumeration districts in the United Kingdom. However, such data mask underlying individual population distributions and may be incompatible with other information sources (e.g. school districts, transportation analysis zones, metropolitan statisti...

Estimating animal population density using passive acoustics

Reliable estimation of the size or density of wild animal populations is very important for effective wildlife management, conservation and ecology. Currently, the most widely used methods for obtaining such estimates involve either sighting animals from transect lines or some form of capture-recapture on marked or uniquely identifiable individuals. However, many species are difficult to sight,...

Improving rice population productivity by reducing nitrogen rate and increasing plant density

In terms of tillering potential, the aboveground portions of rice are significantly influenced by the nitrogen level (NL) and transplant density (TD). To obtain a suitable combination of NL and TD, five NLs (0, 90, 180, 270 and 360 kg ha-1) and two TDs [high density (HD), 32.5×104 hills ha-1; low density (LD), 25.5×104 hills ha-1] were used in the rice experiments during 2012 to 2014, in Jiangs...

Yield and Yield adjustments of nonprolific maize hybrids in response to plant population density

Estimating plant population density: Time costs and sampling efficiencies for different sized and shaped quadrats

Given the increasing number of rare and listed plant species, and decreasing resources dedicated to monitoring such species, the need to implement powerful and efficient sampling designs has never been greater. Previous studies have examined statistical efficiencies of sampling designs; however, few studies have considered associated field efficiencies. We attempted to assess fairly the relativ...