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| Filter results7 paper(s) found. |
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1. Nitrogen and Phosphorus: Mechanisms of Loss from the Soil System and Effects to Slow Those Losses and Increase Plant AvailabilityNutrient management issues associated with production agriculture are becoming more of a concern and a focal point of discussion. Management considerations are no longer focused on just meeting yield goals or improved crop performance, but now include questions on how their use on agriculture lands impacts surface water, watersheds, soil quality, long-term health benefits and economic viability for the producer. ... T. Tindall, G. Mooso |
2. Phosphorus Use Efficiency in Crop ProductionThe limited availability of phosphorus (P) in calcareous and acidic soils can be a major factor that limits crop production. The objectives of this study were to investigate the mobility and availability of P from monoammonium phosphate (MAP), diammonium phosphate (DAP) and ammonium polyphosphate (APP) fertilizers alone and with AVAIL, a fertilizer enhancement product. Two different soil types were used to examine the relationship between P reaction products and available P. Soils were incubated... G. Mooso, T. Tindall, G. Hettiarachchi |
3. Utilizing Low Salt Liquid NPK Fertilizers to Establish Triticale As a Cover CropThe use of cover crops in sustainable agricultural systems is receiving renewed attention. New initiatives in soil health promote cover crops as amanagement tool to improve soil quality and health. Successful establishment of cover crops depends on an adequate soil fertility program. Low salt NPK liquid fertilizers can improve cover crop establishment without concern of the impact of high salt index of some conventional fertilizers. This paper presents some of the success that have been observed... G. Mooso, T. Tindall |
4. Nutrient Management and Improved Efficiency of Drip Irrigated Processing PotatoesWater availability may be the single greatest limiting factor for potato production in irrigated areas of the PNW and other parts of the world. Arid climates with warm temperatures during the day and cooler, drier nights produce some of the world’s largest potato yields with some the best processing quality. However this comes with a challenge and that is water use efficiency. While for many years there is an abundance or adequate water it will not always be the case. These concerns... G. Mooso |
5. Developing Practical Phosphorus and Potassium Tissue Test Recommendations and Utilizing Struvite in Modern Alfalfa SystemsTissue testing whole alfalfa plants at harvest provides opportunities to direct nutrient decision making more accurately. Critical levels developed allow in- season recommendations and applications and would save producers time and effort since growers are already taking samples for hay quality. Three experiments were designed including: P Study with differing rates of P2O5 using monoammonium phosphate (MAP); including: 0, 30, 60, 120, 240 lbs./acre on an 8.1 ppm P soil (Olson P method);... S. Norberg, E. Mackey, S. Fransen, J. Harrison, D. Llewellyn, L. Whitefield |
6. Crystal Green® – the Most Efficient Granular Phosphate FertilizerOver 80% of applied conventional phosphate can be lost to soil fixation or the environment and leaves crops hungry for nutrients when they need them the most. Overapplying conventional phosphate fertilizers, produced from a finite resource, to overcome significant inefficiencies does not align well with industry goals of sustainability. Not only are crops missing out on proper plant nutrition of a critical nutrient, these nutrients are lost to the environment and are responsible for harmful algae... G. Mooso |
7. Converting Between Mehlich-3P and Olsen-P Soil Tests: What Can Go Wrong?Varying methodologies for extracting plant-available phosphorus (P) have been proposed since the initiation of soil test development in the early 1900s. Two tests that were developed and are still used widely in both the United States and Europe are the Olsen and Mehlich-3 test. Olsen P is predominately used in high-pH soils and Mehlich-3 is more common in neutral to acidic soils due to the nature of the extracting solutions. Many Western US soils are high pH and, thus, have used Olsen P... C. Rogers, Z. Simpson, J. Mott, P. Kleinman |