The GP Avatar app

Turfgrass growth is affected by temperature. The temperature-based turfgrass growth potential (GP) is an easy way to look at how the actual temperature is related to the optimum temperatures for growth. PACE Turf put together this GP avatar Shiny app to generate a simple plot of cool-season and warm-season grass GP. There are two options… Continue reading The GP Avatar app

A Shiny app with adjustable rootzone characteristics and irrigation rules

I made this Shiny app that calculates the daily soil water balance. The idea of the app is to change the soil conditions, specifically the rootzone depth and the field capacity, to see how changes in those parameters influence the irrigation requirement. And the irrigation "rules" can be changed too. When will irrigation water be… Continue reading A Shiny app with adjustable rootzone characteristics and irrigation rules

What do Hong Kong, Iceland, Mauritius, and Singapore have in common?

Visitors to the ATC blog in 2016 have come from 153 countries. Of course some countries have a big population, and lots of turfgrass, like the United States, so I would expect a lot of visits from there. Can I check which countries have relatively more or less visits than expected? Such a calculation is… Continue reading What do Hong Kong, Iceland, Mauritius, and Singapore have in common?

Shiny app shows the temperature and sunshine combination for 11 cities in Japan

I made a Shiny app with climatological normals data from the Japan Meteorological Agency to show the combination of sunshine and temperature at 11 locations. @naturalgolf_D asked “What kind of situation is Japan?” With these data, I think it is interesting to compare different locations of interest, and a Shiny app is an easy way… Continue reading Shiny app shows the temperature and sunshine combination for 11 cities in Japan

Six turfgrass Shiny apps

These Shiny applications make calculations related to turfgrass management. Evapotranspiration (ET) calculator Returns the reference and crop evapotranspiration for a day given inputs of latitude, maximum and minimum air temperatures, and crop coefficient. Based on the Hargreaves equation. Sustainability index Returns the sustainability index (SI) based on soil test inputs. This is a direct comparison… Continue reading Six turfgrass Shiny apps