D. R. Hensel's research while affiliated with University of Florida and other places

Publications (5)

Article
For three crop seasons, potatoes (Solanum tuberosum L.) were grown in the field to evaluate the use of an automatically controlled subsurface drip (SDI) irrigation system with conventional semi-closed seepage irrigation (subirrigation). Both the SDI irrigation system and the automated irrigation control system performed well, and crop yields produc...
Article
Inhibition of nitrification in soil results in a decreased ratio of nitrate‐nitrogen (NO3‐N) to ammonium‐nitrogen (NH4‐N). If the conditions for NO3‐N loss by leaching or denitrification exist, nitrification inhibitors should increase concentrations of total inorganic soil nitrogen (N) (TISN) (NH4‐N + NO3‐N). This can then result in plants taking u...
Article
While much research has been done with nitrification inhibitors, little information exists on their effects on total inorganic soil nitrogen (N) (TISN) (NH4 ‐N + NO3 ‐N). The objective of this study was to compare the effects of 2‐chloro‐6‐(trichloromethyl)‐pyridine (nitrapyrin) and dicyandiamide (DCD) on TISN concentrations and to compare the effe...
Article
Nitrification inhibitors may reduce loss of fertilizer N from the root zone by reducing leaching and denitrification. This reduced N loss should be reflected in increased crop yields. These studies were conducted to determine if potato yield, specific gravity, or leaf N at flowering would be increased by use of nitrification inhibitors. Nitrificati...

Citations

... Crop irrigation is facilitated by raising the shallow water table to just below the root zone, a practice termed seepage irrigation or subirrigation (Smajstrla et al., 2000;Way, 2007). There are approximately 323, 000 ha of crop land suitable to subirrigation in Florida (Dukes et al., 2010). ...
... The furrow water seeps laterally underground across the rows and growers use weir structures to hold the water back in ditches along the field's border to raise the water table level (Livingston-Way 2007). The advantages of seepage are its low cost and low maintenance (Haman et al. 1989). However, water use efficiency of seepage ranges from 20 % to 70 % because much of the water pumped is not available for crop use, but is used solely to maintain the water table level (Locascio 2005;Dukes et al. 2012). ...
... Si bien el uso de IN permite incrementar la sostenibilidad de la fertilización nitrogenada, se ha reportado una reducción de la biomasa en lechugas abonadas con N amoniacal, dada la sensibilidad de algunos cultivos al amonio (5) y existen resultados variados sobre el efecto de los IN sobre el rendimiento. Tal es el caso, que en condiciones edafoclimáticas europeas la adición de DMPP permitió incrementar el rendimiento de granos, tubérculos y hortalizas (6,7), pero en la producción de patata bajo riego sobre suelos arenosos e hipertermales no se recomienda utilizar IN (8). ...
... Loss of N to the atmosphere may approach 30% (Wilkison et al, 2000). Numerous studies have investigated nitrification inhibitors in soils at high risk of leaching potential, and once N is leached out of the root zone plant N uptake is reduced (Mason, 1987;McCarty & Bremner, 1989;Francis et al., 1993;Martin et al., 1994). A new nitrification inhibitor, pronitridine (CAS RN 1373256-33-7, Centuro™, Koch Agronomic Services, Witchita, KS), was recently developed to enhance the efficiency of N applications in corn (Vetsch & Schwab, 2014;Gabrielson & Epling, 2016). ...
... Nitrification inhibitors are compounds that delay the bacterial oxidation of ammonium ions to nitrite (and subsequently to nitrate) by suppressing the activity of Nitrosomonas spp. in the soil (Prasad and Power, 1995;Trenkel, 1997). NIs have been used to increase yields and to reduce nitrate leaching in several crops (Malzer and Randall, 1985;Frye et al., 1989;Malzer et al., 1989;Walters and Malzer, 1990;Corré and Zwart, 1995;Davies and Williams, 1995;Martin et al., 1997;Trenkel, 1997;Ball-Coelho and Roy, 1999;Serna et al., 2000;Pasda et al., 2001;Díez-López et al., 2008;Li et al., 2008). A large number of chemicals have been reported as nitrification inhibitors, but only three of them are commercialized worldwide. ...