Using Waterfall Charts to Look at Soil Nutrient Levels: potassium as an example

I have recently described a method that can be used to estimate nutrient requirements for any turfgrass, grown at any location. This method makes use of the temperature-based growth potential and the minimum levels for sustainable nutrition (MLSN) guidelines. This method makes a few basic assumptions about turfgrass management. The soil can hold a fixed… Continue reading Using Waterfall Charts to Look at Soil Nutrient Levels: potassium as an example

Turfgrass Nutrient Requirements and Fertilizer Choice

I made two presentations this week at the Sustainable Turfgrass Management in Asia conference. The slides and supplemental handouts from these presentations are available for download with links provided below. The handouts for each talk are the most useful of these documents. Although the title of the first presentation is Nutrient Requirements of Tropical Turfgrass,… Continue reading Turfgrass Nutrient Requirements and Fertilizer Choice

World Cities Plotted by Climatological Normals, August

This bubble chart shows 46 world cities plotted by average temperature, sunshine, and precipitation in August. We see the continuing trend for cities in Asia to have more rain and less sunshine than cities where similar grasses are grown in the Americas or Europe. Bangalore, Bangkok, Mumbai, and Kolkata all have relatively low sunlight during… Continue reading World Cities Plotted by Climatological Normals, August

What’s the Most Accurate Way to Measure Available Nutrients in the Soil?

Have you seen this picture before? I used this photo in the announcement for turf science seminars I gave at Japan last winter, and a golf course superintendent asked me this week about what is shown in this photo. This is a cation exchange membrane in general, and is specifically a PRS (Plant Root Simulator)… Continue reading What’s the Most Accurate Way to Measure Available Nutrients in the Soil?

What’s the Most Accurate Way to Measure Available Nutrients in the Soil?

Have you seen this picture before? I used this photo in the announcement for turf science seminars I gave at Japan last winter, and a golf course superintendent asked me this week about what is shown in this photo. This is a cation exchange membrane in general, and is specifically a PRS (Plant Root Simulator)… Continue reading What’s the Most Accurate Way to Measure Available Nutrients in the Soil?

World Cities Plotted by Climatological Normals, July

This bubble chart shows 46 world cities plotted by average July temperature, July sunshine, and July precipitation. The plot for June had 45 cities; at the suggestion of Dr. Larry Stowell from PACE Turf, I have added San Diego to the chart for this and future months.  Hong Kong has a bit more sunshine in July,… Continue reading World Cities Plotted by Climatological Normals, July

World Cities Plotted by Climatological Normals, July

This bubble chart shows 46 world cities plotted by average July temperature, July sunshine, and July precipitation. The plot for June had 45 cities; at the suggestion of Dr. Larry Stowell from PACE Turf, I have added San Diego to the chart for this and future months.  Hong Kong has a bit more sunshine in July,… Continue reading World Cities Plotted by Climatological Normals, July

How Much Potassium Does Turfgrass Need?

Potassium is the mineral element found in the second-highest concentration in turfgrass leaves; only nitrogen is at a higher concentration. But how much potassium fertilizer is enough? Dr. Doug Soldat from the University of Wisconsin wrote a post for the Turf Diseases website entitled How I'd Manage Potassium on Cool-season Turf, and he has expanded… Continue reading How Much Potassium Does Turfgrass Need?

New Calendar Page on ATC Website

I've added a new page to the Asian Turfgrass Center website with a calendar of selected turfgrass conferences and educational seminars that may be of interest to turfgrass managers in Asia. This is not a comprehensive list of events, but I will keep it updated with events as I become aware of them. If you… Continue reading New Calendar Page on ATC Website

A Plot of Cities Where Warm-season Grasses Grow, and more

I made the bubble plot above to see how the differences in temperature and sunlight and rainfall between cities would appear if plotted this way. The data are from climatological normals provided by national meteorological services and the World Meteorological Organization, collected in some cases from the climate section of a city's page on Wikipedia.… Continue reading A Plot of Cities Where Warm-season Grasses Grow, and more