Category: Cool Research

Out of the lead frying pan and into the phosphate fire

A recent NYT post reports that adding fish meal to lead-contaminated soils will cause the lead to bind to phosphate found in fish bones.  As the article explains, this chemical reaction results in the formation of pyromorphite, “a crystalline mineral that will not harm anyone even if consumed.”

Given my concerns about excessive phosphate loading in urban soils, I contacted Dr. Rich Koenig, an urban soil scientist and chair of WSU’s Crop and Soil Science department. … Continue reading this article “Out of the lead frying pan and into the phosphate fire”

Helium Makes Kudzu Float Away

As promised — some happy news:  There’s this kid in Valdosta, GA (close to Tifton where I spent a few years as a graduate assistant), who has been experimenting with ways to kill kudzu.  Here’s the video.

To see this kid work on something like this at such a young age is fantastic and gives me hope for the future.  I wish the kid were here so he could come to the University of Minnesota – I think he has a lot to offer and he makes me slightly more optimistic about where horticulture ends up.… Continue reading this article “Helium Makes Kudzu Float Away”

Harvesting an Experiment

This has been an exciting week for me.  On Monday we started cleaning off 72 rootballs of various tree species that had been planted 5 years ago for a study.  These trees had been planted in containers and become potbound at the nursery from which we received them.  We treated them in one of three ways.  Either we did nothing (in other words we just dropped the pot bound tree in a hole), we used the standard methods that Universities recommend for slicing potbound roots (Four deep slits down the sides and a deeply cut X across the bottom), or we cut off all of the circling roots by cutting the pot bound root system into a box shape.… Continue reading this article “Harvesting an Experiment”

Are Pretty Flowers Useful?

Yesterday I had the opportunity to listen to Marla Spivak, a very highly regarded bee scientist, talk about how bees defend themselves from disease.  Very interesting stuff.  I took a lot of information away from the talk, two bits of which I want to share with you.

The first is a vocabulary word — propolis – go ahead, google it (I don’t think too much inappropriate stuff will pop up) – it’s an antimicrobial “ointment” which bees create from stuff like the resins on tree buds.… Continue reading this article “Are Pretty Flowers Useful?”

Plant containers – does size really matter?

A few days ago I got a question from Cynthia about “potting up.”  For those of you for whom this is an unknown phrase (and no, it’s not a euphemism for a certain herbal activity), it refers to the practice of moving plants into ever larger containers.  She was wondering if there was any “real science” behind the practice – in other words, why not just start out with a larger container?

Hah! I needed no further encouragement and spent several days collecting and reading decades’ worth of research.… Continue reading this article “Plant containers – does size really matter?”

Off-label Use of a Chicken*

 

[Extremely] Preliminary research results from the University of Maryland indicate
chickens may be of interest in the fight against Halyomorpha halys, the brown
marmorated stink bug. 

There are good stink bugs and bad stink bugs. The brown marmorated stink bug is a bad one. A relatively new introduced pest, it is piercing, sucking, and generally ruining vegetable and fruit crops (as well as some ornamentals) across a good part of the U.S.  There are apparently few natural predators for this imported species and they reproduce like mad, thus the potential for this to become a very serious economic issue.… Continue reading this article “Off-label Use of a Chicken*”

Sudden Death Syndrome in Soy — Biggest Threat to the Entire Food Chain?

This past week we received an interesting e-mail about something called “sudden death syndrome” which we were asked to blog about.  Here’s the article we were sent.  We don’t always take requests, but we thought that this was an interesting one, so we decided to write a little post about it.  Sudden death syndrome is basically a fungal disease which affects the roots of soybeans.  Recently there has been some press out there about how Round-up ready soybeans are particularly susceptible to this disease and that the spraying of roundup itself can lead to favorable environments for it.… Continue reading this article “Sudden Death Syndrome in Soy — Biggest Threat to the Entire Food Chain?”

Should we use biochars in our gardens?

In the last few years, I’ve had a number of people ask me about biochar:  what  is it and what does it do?  Should they add it to their garden?  Should they make their own biochar?  So while the subject deserves a longer review, I thought it would be useful to discuss it briefly on the blog.

In the strictest sense, “biochar” refers to charcoal that’s made as a byproduct of biofuel production.  Various crop residues, livestock manures, and just about any other organic material you can imagine has been studied for this purpose. … Continue reading this article “Should we use biochars in our gardens?”

Planting trouble: multiple trees in one hole

[I enjoyed Jeff’s Valentine story so much that I thought I’d stick to the theme of togetherness…for better or worse.]

A week or so ago a reader asked about the practice of planting three or four fruit trees in the same hole.  Having not heard of this before, I checked on the web and found many “how to” pages geared to home gardeners who either want a longer harvest of a particular fruit (early to late) or a mixture of different species. … Continue reading this article “Planting trouble: multiple trees in one hole”

Insects and Fertilization

Linda got a few comments and questions on her post a couple of weeks ago on fertilization and insect resistance.  This is an issue I’ve been peripherally involved with over the years so I wanted to share a few thoughts.  First, the relationship between plant nutrition and insect resistance is extremely complex.  We often have difficulty predicting how a plant is going to respond to fertilization, let alone predict how an insect is going to respond to how the plant responded. … Continue reading this article “Insects and Fertilization”