User profiles for C. J. Penn

Chad Penn

USDA Agricultural Research Service
Verified email at ars.usda.gov
Cited by 4798

[HTML][HTML] A critical review on soil chemical processes that control how soil pH affects phosphorus availability to plants

CJ Penn, JJ Camberato - Agriculture, 2019 - mdpi.com
Occasionally, the classic understanding of the effect of pH on P uptake from soils is questioned
through the claim that maximum P uptake occurs at a pH much lower than 6.5–7. The …

Soil acidification from long‐term use of nitrogen fertilizers on winter wheat

…, H Zhang, K Girma, WR Raun, CJ Penn… - Soil Science Society …, 2011 - Wiley Online Library
Although N fertilizers are not acidic, their inputs to soil are acid forming. As a result of the
long‐term use of N fertilizers, soils in the Great Plains are becoming more acidic and this acidity …

[HTML][HTML] Nitrogen, phosphorus, calcium, and magnesium applied individually or as a slow release or controlled release fertilizer increase growth and yield and affect …

JC Cole, MW Smith, CJ Penn, BS Cheary… - Scientia …, 2016 - Elsevier
The US Environmental Protection Agency (USEPA) has restricted concentrated animal feeding
operation (CAFO) release of waste products into US waters. These waste products must …

Removing dissolved phosphorus from drainage ditch water with phosphorus sorbing materials

CJ Penn, RB Bryant, PJA Kleinman… - Journal of soil and water …, 2007 - jswconline.org
Penn is an assistant professor of soil and environmental chemistry in the Department of
Plant and Soil Science, Oklahoma State University, Stillwater, Okalahoma. Ray B. Bryant is a …

Shear diffusion and the spreading of oil slicks

AJ Elliott, N Hurford, CJ Penn - Marine Pollution Bulletin, 1986 - Elsevier
Controlled releases of oil in the southern North Sea have shown that slicks elongate rapidly
in the direction of wind and waves. Empirical methods that relate the spreading to ad-hoc …

Streambanks: A net source of sediment and phosphorus to streams and rivers

GA Fox, RA Purvis, CJ Penn - Journal of environmental management, 2016 - Elsevier
Sediment and phosphorus (P) are two primary pollutants of surface waters. Many studies
have investigated loadings from upland sources or even streambed sediment, but in many …

Environmental and production consequences of using alum‐amended poultry litter as a nutrient source for corn

…, GL Mullins, D Keahey, CJ Penn - Journal of …, 2006 - Wiley Online Library
Field trials were established to compare alum‐treated poultry litter (ATPL), normal poultry
litter (NPL), and triple superphosphate (TSP) as fertilizer sources for corn (Zea mays L.) when …

Phosphorus forms in biosolids‐amended soils and losses in runoff: Effects of wastewater treatment process

CJ Penn, JT Sims - Journal of Environmental Quality, 2002 - Wiley Online Library
Continuous addition of municipal biosolids to soils based on plant nitrogen (N) requirements
can cause buildup of soil phosphorus (P) in excess of crop requirements; runoff from these …

Soil fertility and plant nutrition

JM McGrath, J Spargo, CJ Penn - Plant Health, 2014 - pure.psu.edu
Soil fertility and plant nutrition is an applied science that integrates knowledge across all
disciplines of soil and plant sciences to effectively and efficiently provide nutrients to plants. …

Consequences of 33 years of plastic film mulching and nitrogen fertilization on maize growth and soil quality

F Ding, S Li, J Lu, CJ Penn, QW Wang… - Environmental …, 2023 - ACS Publications
Plastic film mulching and urea nitrogen fertilization are widely used in agricultural
ecosystems, but both their long-term use may leave a negative legacy on crop growth, due to …