Browsing by Author "Martz, Marvin E."
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- Nitrogen and phosphorus fertilization for efficient corn production in VirginiaMartz, Marvin E. (Virginia Polytechnic Institute and State University, 1995)Traditional com fertilization methods of broadcasting N fertilizer, and applying P fertilizer to soils testing high to very high in plant-available P, can be inefficent. Experiments were conducted at several locations in Virginia to evaluate if band applications of N fertilizer are more efficient than surface broadcast applications, to determine optimum starter-band and sidedress N rates for com grown in Virginia, to evaluate possible indicators of optimum starter-band and sidedress N rates, and to determine if there is any response to P fertilizer application to com grown on soils testing high to very high in plant-available P. Starter-band N rates of 11, 34, 56, and 78 kg ha⁻¹, and a treatment of 67 kg ha⁻¹ broadcast plus 11 kg ha⁻¹ in a starter-band, were applied in combination with sidedress-N rates of 0, 67, 134, and 202 kg ha⁻¹. In the phosphorus experiment, starter-band rates of 0, 22, 45, and 67 kg P₂O₅ ha⁻¹ were applied. Band application of N increased com plant tissue N content at most locations compared to broadcast application. Fifty-six kg ha⁻¹ was determined to be an economically viable starter-band N rate for com grown in Virginia. Optimum sidedress N rates were determined to be site- and season-dependent and no indicators of optimum starter-band N rates or sidedress N rates were observed. On soils testing high to very high in plant-available P, grain yield did not respond to additions of P fertilizer.
- Nitrogen and Phosphorus Fertilization of CornAlley, Marcus M.; Martz, Marvin E.; Davis, Paul H.; Hammons, J. L. (Virginia Cooperative Extension, 2009)Discusses use of nitrogen and phosphorus fertilizers for corn (Zea mays). Discusses placement and amounts of fertilizers to use.
- Nitrogen and Phosphorus Fertilization of CornAlley, Marcus M.; Martz, Marvin E.; Davis, Paul H.; Hammons, J. L.; Thomason, Wade E. (Virginia Cooperative Extension, 2019-03-20)Discusses use of nitrogen and phosphorus fertilizers for corn (Zea mays). Also discusses placement and amounts of fertilizers to use.
- Nitrogen and Phosphorus Fertilization of CornAlley, Marcus M.; Martz, Marvin E.; Davis, Paul H.; Hammons, J. L. (Virginia Cooperative Extension, 2019-01-24)Discusses use of nitrogen and phosphorus fertilizers for corn (Zea mays). Also discusses placement and amounts of fertilizers to use.