Andrew Hollman

A Hardened CO$_2$ Sensor for In-Ground Continuous Measurement in a Perennial Grass System

Bobby Schulz, Bryan C. Runck, Andrew Hollman, Ann Piotrowski et autres

Carbon dioxide levels below the soil surface are an important measurement relating to plant health, especially for plants such as perennial grasses in northern climates where ice encasement can occur over winter. In such cases, the CO$_2$ levels can build up and …

Real-time Geoinformation Systems to Improve the Quality, Scalability, and Cost of Internet of Things for Agri-environment Research

Bryan C. Runck, Bobby Schulz, Jeff Bishop, Nathan Carlson et autres

With the increasing emphasis on machine learning and artificial intelligence to drive knowledge discovery in the agricultural sciences, spatial internet of things (IoT) technologies have become increasingly important for collecting real-time, high resolution data for these models. However, managing large fleets of …

Association of hard fescue (Festuca brevipila) stress tolerances with genome mapped markers

B. Shaun Bushman, Matthew D. Robbins, Yinjie Qiu, Eric Watkins et autres

Abstract Hard fescue is an allo‐hexaploid, caespitose, cool‐season grass that is part of the fine‐leaved ovina complex of the Lolium–Festuca clade in Poaceae. It is predominantly used as a low‐maintenance turfgrass and soil stabilization grass in situations with reduced inputs of nitrogen …

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Assessing the fertilizer and pesticide input needs of cool‐season turfgrass species

Ross C. Braun, Eric Watkins, Andrew Hollman, Aaron J. Patton

Abstract Professional turfgrass managers and consumers continue to express interest in low‐input turfgrasses; however, the potential reductions in maintenance inputs from “low‐input” turfgrasses are largely assumed and have not been well‐quantified. Over 3 years, replicated field experiments at Purdue University and the …

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Management, harvest, and storage characteristics of low‐input cool‐season turfgrass sod mixtures

Ross C. Braun, Eric Watkins, Andrew Hollman, Nicole T. Mihelich et autres

Abstract The lack of turfgrass diversity in cool‐season sod production is related to information inefficiencies, such as the lack of agronomic information available on improved, low‐input species, such as fine fescues (Festuca spp.). Collaborative research between Purdue University and University of Minnesota …

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Nitrogen fertilizer and clover inclusion effects on the establishment of fine fescue taxa

Ross C. Braun, Emily Braithwaite, Alec R. Kowalewski, Eric Watkins et autres

Abstract Little information exists on establishment vigor differences among fine fescue taxa (Festuca L. spp.) and on the effects N fertilizer levels or clover (Trifolium L. spp.)‐inclusion during establishment. Five replicated field experiments in Indiana, Minnesota, and Oregon were conducted from 2019 …

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Optimal fine fescue mixture seeding dates in the northern United States

Ross C. Braun, Aaron J. Patton, Eric Watkins, Andrew Hollman et autres

Abstract Research is lacking on best establishment practices of fine fescues (Festuca spp.), such as optimal seeding timings, which are well known for other cool‐season turfgrasses. Our objective was to document establishment and determine optimal seeding timings for mixed stand of fine …

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Investigation of cool‐season species, seeding rate, and nitrogen fertilization in sod production: I. Establishment and sod tensile strength

Ross C. Braun, Eric Watkins, Andrew Hollman, Nicole T. Mihelich et autres

Abstract New regulations aimed at reducing soil erosion along with changing building and residential codes are increasing sod demand, especially low‐input species, which are currently in very short supply and require research.Replicated field experiments were established in Indiana and Minnesota to quantify …

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Investigation of cool‐season species, seeding rate, and nitrogen fertilization in sod production: II. Management and shelf‐life

Ross C. Braun, Eric Watkins, Andrew Hollman, Nicole T. Mihelich et autres

Abstract Research is required on sod to explore the differences in management and postharvest practices to help inform sod producers and reduce information inefficiencies that affect the supply and demand of cool‐season turfgrass sod. Replicated field experiments were conducted in Indiana and …

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Regional Optimization of Roadside Turfgrass Seed Mixtures

Eric Watkins, Florence Sessoms, Andrew Hollman, M. Laskowski et autres

Current MnDOT specifications for roadside turfgrasses suggest statewide planting of mixtures that are grouped into five broad categories such as low maintenance turf and high maintenance turf. The objective of this research was to identify turfgrasses that possess traits necessary to survive …

Optimum Seeding Rate and Biomass Removal Timing for No-Mow Fine Fescue Golf Course Roughs

Ryan Schwab, Eric Watkins, Andrew Hollman, Brian P. Horgan et autres

Poster presented at the 2019 ASA-CSSA-SSSA Annual Meeting, Nov. 10-13 in San Antonio, TX

Variability in Creeping Bentgrass Cultivar Germinability as Influenced by Cold Temperatures

Garett C. Heineck, Samuel J. Bauer, Matthew J. Cavanaugh, Andrew Hollman et autres

Core Ideas Golf course superintendents often overseed winter-damaged areas with creeping bentgrass in the early spring when temperatures are not ideal for rapid germination. Typical spring temperatures in the upper Midwest were used to define treatments in a controlled environment study to …

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