House of Phos

Soil, Ag, and Env Chemist. Researcher at USDA-ARS NSERL. Focus on phosphorus removal structures, soil testing & plant availability. [email protected]

[House of Phos @ChadPenn12]

Landscape depressions a.k.a. "prairie potholes" are a new frontier when it comes to nutrient transport, especially #phosphorus. You'll see more on this coming out of our lab over the next few years: https://t.co/CAPlZxz3TL

[House of Phos @ChadPenn12]

Free access for 50 days. Perhaps for the first time ever, we were able to "dial in" wavelength ratios for sensing #phosphorus deficiency in corn. We could identify medium-deficient hidden-hunger that showed no visible signs of deficiency. https://t.co/cCv6LNPmOa

[House of Phos @ChadPenn12]

Another option for steel turnings is to place a water-table control structure on the drainage-side of the P removal structure to maintain water table just below the surface of filter media, still allowing top-down drainage. This one stayed moist and unconsolidated.

[House of Phos @ChadPenn12]

#phosphorus filtration by steel shavings/gravel. Media needs to stay moist with no wet-dry cycles or it may solidify (but still drains well). Picture on left are such clods, while material on right was in bottom-up structure with no drying, remaining unconsolidated for 3 years.

[House of Phos @ChadPenn12]

Showing the P-Trap demonstration #phosphorus removal structure at Dekalb county field day, hosted by The Andersons. Austin White with ARS and Ben Wicker of the IN Ag Nutrient Alliance. I should of got a pic with the audience...

[House of Phos @ChadPenn12]

Open access paper on #phosphorus uptake in Era hybrids going back to 1932. Editor's choice award. This study purposely excludes effect of root architecture by using sand-culture hydroponics, to solely measure P utilization efficiency in Era hybrids https://t.co/SilXHmVKe0

[House of Phos @ChadPenn12]

We are looking for a post-doc to come to Purdue and work on #phosphorus transport. I pasted the job description on a post in LinkedIn https://t.co/LaTzC0BpIT

[House of Phos @ChadPenn12]

A new blog post based on data from a not-new paper. How excess #phosphorus can potentially limit corn grain yield in certain circumstances. Courtesy of the Sustainable Phosphorus Alliance. https://t.co/jzYMSEhbAB

[House of Phos @ChadPenn12]

@voss_ag @ChrisK_Banded H2PO4 and HPO4. pH around 7 so there is a combination of both. All other nutrients were also added in fertigation at sufficient levels.

[House of Phos @ChadPenn12]

This one is for @ChrisK_Banded , some reading material if you have trouble falling asleep.....#phosphorus uptake and timing. https://t.co/OCkUOwd4cp

[House of Phos @ChadPenn12]

Putting out #phosphorus plots on low P soils. Pic on left is the saltshaker application method for extreme precision; even if you have a thimble-full remaining, you walk around the plot six times to distribute it evenly! Joking.....sort of.

[House of Phos @ChadPenn12]

Luca Amaro, a visiting student agronomist from Brazil, got a surprise when his parents and brother came to visit at the National Soil Erosion Research Laboratory!

[House of Phos @ChadPenn12]

@ChrisK_Banded @richd2016 Thanks for posting . I certainly did not know all of that. Biology aside, I suppose the foundation I'm building my nutrient uptake model from is that growth processes require a minimum uptake mass of nutrient within certain windows, to achieve a given yield

[House of Phos @ChadPenn12]

Potholes tend to become #phosphorus hotspots and represent the most economical intercession point for trapping P, especially for replacing a tile riser with a modified blind inlet. Hear Mark Williams @AgriH2O and I explain: https://t.co/Acv0YYXUIW

[House of Phos @ChadPenn12]

@ChrisK_Banded @BobGunzy @swatmaps @OSU_NPK Yes indeed. McGrath and I have been making plans with regard to incorporating my nutrient uptake model with that work.

[House of Phos @ChadPenn12]

Sometimes we use filters to remove #phosphorus from wastewater during treatment. Sometimes they clog. Amin's new paper describes how/why and prevention. https://t.co/ddDtwoFf34 Congrats to Amin, this one was a lot of work.

[House of Phos @ChadPenn12]

The first stacked #phosphorus removal structure-nitrogen bioreactor. https://t.co/pgDRBeZvGk Surprised it worked that well with such low inflow P concentrations. A mystery on how alumina removed N in this scenario. Need to construct them to handle peak flow rates.

[House of Phos @ChadPenn12]

Kurt Reinhart just published this (open for 50 days). My first involvement on a #mycorrhizae project. These plants in calcareous soils obtained more of the poorly soluble #phosphorus by root mining/exudates than through mycorrhizae. https://t.co/mts1hsrr9S

[House of Phos @ChadPenn12]

Snapshot of V14 #corn grown in our indoor grow-room compared to greenhouse and field. Greenhouse corn is tall and spindly compared to grow-room and field due to less-than-ideal light conditions (etiolation). Grow-room is thick on the stem and leaves.

[House of Phos @ChadPenn12]

#jobpost Our research facility is hiring a new technician for conducting water quality and fertility experiments, and analyze soil and water samples. https://t.co/TgsrTGT7CY If you apply, please check all the boxes indicating you are qualified so I can see your application