Author Bio

Dr. Petrus Langenhoven is a Horticulture and Hydroponics Crops Specialist at Purdue University in West Lafayette, IN. He joined the Department of Horticulture and Landscape Architecture in March 2015. Prior to this, he dedicated his career to the development of Sub-Saharan Africa’s specialty crops sector. With specialization in hydroponics and vegetable crop production, Dr. Langenhoven is a key member in the Department of Horticulture and Landscape Architecture’s Controlled Environment Agriculture (CEA) Team. CEA has been identified as a signature area for the Department. Interest in healthy sustainably produced food, local foods, and urbanization of the state, and emerging new technologies provide a set of conditions that pushes this segment of horticulture forward. His expertise in vegetable and peppermint production serves a critical teaching need. His strong background in horticulture production research and Extension allows him to leverage research and Extension programming around new technologies and expertise in high tunnel and greenhouse management, and open field vegetable production. His skills propel him to engage in new crop development activities such as microgreens, personalized specialty cantaloupe, leafy amaranth, summer squash, sweet colored and chili pepper, and peppermint production. Dr. Langenhoven serves as Co-Director of the Purdue Student Farm and Co-Chair of the Indiana Horticulture Conference & Expo. Tel: 765-496-7955 Email: Presentation title: Does NFT channel design impact leafy green growth and productivity? Abstract: There are many different NFT channel designs available in the U.S. market. Is there an advantage to use a specific design? We will share experiences growing lettuce in different channel design options.  


Wednesday - 1:00 pm-3:00 pm - Room: Atrium

Energy-Use-Efficiency Differences Between LED Supplemental Lights under Nutrient Film Technique (NFT) and Constant Flood Table (CFT) Systems- Alex Miller, Krishna Nemali, Petrus Langenhoven

Using energy efficient light emitting diodes (LED) and heated nutrient solution (21°C) (HNS) in suboptimal greenhouse air temperatures (16°C), electrical energy use efficiency (EUE) (g·KWh-1) can be optimized to reduce production costs. Our objective was to compare EUE differences between nutrient film technique (NFT) and constant flood table (CFT) systems under LED lighting treatments with

Wednesday - 1:00 pm-3:00 pm - Room: Atrium

Impact of the Growing Location on the Microbial Load of Different Varieties of Cantaloupes- Hansel Mina, Amanda Deering, Petrus Langenhoven

Cantaloupes are perishable and susceptible to microbiological contamination during production, harvest, and distribution. Since cantaloupes are grown on the ground, preharvest safety concerns come from the bacterial load that they can harbor from the soil and the contamination with foodborne pathogens carried by irrigation water, manure-based fertilizers and wild animals. The study examined the microbial

Wednesday - 1:00 pm-3:00 pm - Room: Atrium

Why a Propagation Standard for Hemp Clones and Seedlings will Improve Crop Yield- Petrus Langenhoven and Robert Colangelo

The 2019 Indiana hemp experience was not great for many of the first-time farmers. Growers experienced a wetter than normal spring which delayed planting in many areas. There was also a lot of poor quality plant material sold to growers. In some cases the plant material was accompanied with questionable certificates of analysis. Plant material

Thursday - 9:30 am-10:00 am - Room: Salon 3

Pepper Varieties that Perform Well in High Tunnels- Dr. Petrus Langenhoven

Sweet colored pepper is a very lucrative crop grown mostly for direct-to-consumer markets. Using high tunnels for the production of vegetables has become very popular. It allows growers to extend their production season, protect their crop against severe environmental conditions, and produce high yielding crops of exceptional quality. Sweet colored peppers can yield well in