Download or read book Potato Yield and Grade as Influenced by Nitrogen Fertilizer and Irrigation Frequency written by Clinton Cecil Jacks and published by . This book was released on 1972 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of irrigation frequencies and rates and time of nitrogen fertilizer application on the yields, grades and N status of Russet Burbank potatoes were determined on a sandy soil near Hermiston, Oregon. Increasing the frequency of irrigation from 72 to 48 to 12-hours did not result in increases of yields or improved grades of tubers during the growing season. Optimum yields and grades were obtained when 196 lbs. N/A was applied in a single fertilizer application with 88 lbs. N/A in the soil as nitrate-N. This N treatment corresponded to 0.58, 0.42, 0.46, 0.32 and 0.17 percent petiole nitrate-N on July 6, July 21, August 4, August 24 and September 9 sampling dates, respectively. Split N fertilizer applications resulted in higher petiole nitrate-N levels during the growing season, similar total yields and lower yields of U.S. No. 1 tubers than treatments in which all of the fertilizer was applied at planting. The higher petiole nitrate-N levels delayed tuber maturity and subsequently the split N applications were influenced by the high soil and air temperatures in July and August and formed increased yields of off-shape tubers. This emphasizes the importance of adequate N early in the growing season in order to prevent delayed vine and tuber growth and the importance of even assimilation of nutrients by the tubers in later stages of development.

Download or read book Potato Production Functions as Influenced by High Frequency Irrigation and Nitrogen Fertilization Using a Continuous Variable Design written by Fadi Kamand and published by . This book was released on 1979 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Irrigation on Nitrogen Other Fertilizer Requirements of Potatoes written by R. C. McKenzie and published by . This book was released on 1985 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report presents results of 1985 experiments as part of field experiments conducted from 1983 to 1985 re. effect of different rates of nitrogen fertilizer, micronutrient additions, and extra potassium on yield and quality of potatoes grown under two levels of irrigation.

Download or read book Potato Fertilizers written by Whitman Howard Jordan and published by . This book was released on 1910 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Irrigation and Nitrogen Effects on the Factors which Influence the Yield of a Hill of Potatoes written by Thomas Howard Obourn and published by . This book was released on 1962 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Potato Yields and Quality written by Frank M. Harrington and published by . This book was released on 1941 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Varying Levels of Irrigation Nitrogen Phosphorus and Potassium on the Growth and the Yield of the Potato written by and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book O S U Theses and Dissertations 1970 1977 written by Oregon State University and published by . This book was released on 1980 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Timing of Climatic Factors that May Influence Potato Yield Quality and Potential Nitrogen Losses in a Northeast Florida Seepage irrigated Potato Production System written by Christine Maria Worthington and published by . This book was released on 2006 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Potato, a cool season crop, is planted in Northeast Florida in January when temperatures are cool. As the season progresses, daily temperatures and incidence of leaching rainfall events increase which can affect yield and quality. Nutrient runoff from potato production land has thought to have been primarily responsible for the non-point source pollution into the St. Johns River watershed. Best Management Practices (BMPs) for potato production in the TCAA have been implemented. With over 7,000 ha in potato production in the TCAA, the main concern with the implementation of the BMPs are to not compromise yield and quality. The experimental design in chapter 2 was a split-split design with four blocks. Planting dates (1-6) were main plots. The first split was the N rate (168 and 224 kg ha-1). The second split was potato variety, 'Atlantic' and 'Harley Blackwell'. The experimental design in chapter 3 was a split-split design with four blocks. Irrigation treatments were main plots at 0, 2, 4, 8, and 12 WAP (weeks after planting). The first split was the nitrogen source (AN or CRF). The second split was an additional side-dress fertilizer application. Optimal yields for the TCAA occurred over a 4 week period (early to late February) in a twelve week planting window. 'Harley Blackwell' demonstrated its effectiveness to produce quality tubers under conditions when air temperatures and leaching rainfall events stressed plants. IHN was triggered by rainfall and nutritional conditions that stressed the plant early in the season combined with increasing minimum daily temperatures later in the season. Marketable yields in the CRF treatments were an average of 12% higher compared with the AN fertilizer treatment. The CRF treatments had a significantly higher incidence of tubers with IHN compared with the AN fertilizer treatment at 22.3 and 15.6%, respectively. NO3-N loading from surface water runoff from potato production was decreased an average of 43% with the use of the CRF compared with the AN fertilizer treatment. A CRF used in potato production, rather than a soluble N fertilizer, could reduce NO3-N loads into the St. Johns River watershed by 56,000 kg N per year.

Download or read book Influence of Commercial Fertilizers on Idaho Potatoes written by Harold William Emanuel Larson and published by . This book was released on 1945 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Potato Yield Response to Deficit Irrigation and Nitrogen Fertilization written by Layal Jihad Darwiche and published by . This book was released on 1998 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results indicate that a minimum of 9% water savings can be achieved without significantly affecting the yield. Furthermore, when water is not limiting, 37% and 31% nitrogen savings can be achieved under the given experimental conditions, with conventional and fertigation method of fertilizer application, respectively, without significantly affecting the yield. A three-dimensional crop production function relating water and nitrogen to potato yield was also generated.

Download or read book Potato Yields and Quality with Different Nutrients Seeding Rates Irrigations and Growth Regulators written by H. D. Fuehring and published by . This book was released on 1974 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Use Efficiency in Irrigated Potato written by Francis Zvomuya and published by . This book was released on 2000 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book COVER CROP AND NITROGEN FERTILIZER MANAGEMENT FOR POTATO PRODUCTION IN THE NORTHEAST written by Emad Jahanzad and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Potato (Solanum tuberosum L.) rates fourth among the world's agricultural products in terms of production volume and human consumption and worldwide demand for potatoes will exceed that of rice, wheat, or corn by 2020. Potato consumption has been a major part of the North American diet since early in the 17th century and as a dominant arable crop in the Northeastern United States. There are over 2700 potato fields in the Northeast United States and potato growers often over apply nitrogen (N) fertilizer to ensure against loss of yield. High mobility of nitrate form N fertilization in the soil profile makes it susceptible to leach to the lower soil levels leading to ground water nitrate contamination, other environmental concerns, and increased costs of production. Rye (Secale cereale L.) is the most widely grown cover crop in the Northeast U.S, and its N-scavenging capacity and adaptability to the soils and climates in the region have been well documented. However, it might not be an adequate source of N for the early planted cash crops in the spring because it is not given the opportunity to grow in the spring and accumulate substantial amount of biomass. Therefore, we implemented field experiments to evaluate whether forage radish (Raphanus sativus L.) or winter peas (Pisum sativum L.) could be a more appropriate cover crop than rye in rotation with Dark Red Norland and Superior potatoes in Massachusetts. We also applied four levels of N fertilizer (0, 75, 150, and 225 kg ha-1) in combination with cover crops to tailoring N rates as an external source of N in addition to the released N from cover crop residues. Our study centered on three major topics: (i) Cover crop decomposition rate and trend of nutrient release in a conventional or no till system to evaluate whether there is a synchrony with potato nutrient demands (ii) Tuber yield and nutrient density of potatoes as influenced by cover crops and N fertilization and (iii) Nitrogen use efficiency (NUE) indices, tuber quality, and pest control in potatoes. Our results indicated that a conventional tilling system accelerated the decomposition process and also increased the rate of nutrient loss in the soil compared with a no till system. Among the cover crops used in this study, forage radish or peas accumulated more N than rye. Also, forage radish or peas with narrower C:N ratio released their N content in a faster trend. Potato tuber yield in both varieties was improved, and peas or forage radish outperformed than rye or no cover crop plots in this regard. Also, forage radish was advantageous over winter peas or rye in terms of providing nutrients other than N as suggested by more nutrient dense potatoes. Cover crops, especially peas or forage radish were efficient in reducing N fertilization requirements in both potato varieties as indicated by higher NUE parameters. Potatoes planted after cover crops were less efficient in utilization of the supplied N than potatoes following fallow. Application of high rates of N fertilizer decreased NUE parameters through enhanced vegetative growth or probably environmental losses. Forage radish or peas exhibited more synchrony with potato N demands at its critical growth stages in terms of N release from residues. Cover crops did not produce potato tubers of higher quality than no cover crop plots. Colorado potato beetle infestation was lower in potato plants after rye early in the spring than with the other cover crops; however, later in the season all of the treatments showed the same infestation. Weed infestation tended to be lower in cover crop plots than in no cover crop plots, yet, rye and forage radish were advantageous over winter peas for suppressing weeds. Overall, it is proposed that planting forage radish as early as possible in late August or early September could produce more potato yield and improve nutrient density than winter peas or winter rye. Also, to get the most out of the released nutrients, especially nitrogen, it is important to prepare the land and plant potatoes as early as possible in the spring.

Download or read book Microirrigation for Crop Production written by and published by Elsevier. This book was released on 2006-09-28 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microirrigation has become the fastest growing segment of the irrigation industry worldwide and has the potential to increase the quality of food supply through improved water fertilizer efficiency. This book is meant to update the text "Trickle Irrigation, Design, Operation and Management". This text offers the most current understanding of the management criteria needed to obtain maximum water and fertilization efficiency. * Presents a detailed explanation of system design, operation, and management specific to various types of MI systems * Analyzes proper use of irrigation technology and its effect to increase efficiency * Provides an understanding to the basic science needed to comprehend operation and management * Over 150 figures of designs and charts of systems including, surface drip, subsurface drip, spray/microsprinkler, and more

Download or read book The Effects of Irrigation and Nitrogen Management on Potato Tuber Yield N Recovery and Leaching in Northeast Florida written by Yandi Fan and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Was because drip tapes could not be installed until potato emerged. Therefore, a booster dose of fertilizer at planting to meet the nutrient requirement and establishment of potato plants is probably necessary to overcome the delayed fertigation problem.

Download or read book 1984 Research Report Nitrogen and Other Fertilizer Requirements for Irrigated Potato Production written by R. C. McKenzie and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report presents results of 1984 experiments as part of field experiments conducted from 1983 to 1984 re. effect of different rates of nitrogen fertilizer, micronutrient additions, and extra potassium on yield and quality of potatoes grown under two levels of irrigation.