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Book An investigation into the effect of soil and foliar applied nitrogen on the growth nitrogen content and yield of soybean Glycine max L Merr

Download or read book An investigation into the effect of soil and foliar applied nitrogen on the growth nitrogen content and yield of soybean Glycine max L Merr written by John Lancaster Neen and published by . This book was released on 1984 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effect of Nitrogen Forms and Methods of Application Upon Yield and Several Yield Components of Soybeans Glycine Max L

Download or read book The Effect of Nitrogen Forms and Methods of Application Upon Yield and Several Yield Components of Soybeans Glycine Max L written by Mansoor Tasdighi and published by . This book was released on 1977 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effect of Nitrogen Fertilizer induced Acidity and Liming on Soil Nutrient Relationships Yield and Uptake Patterns by Soybeans Glycine Max L Merr

Download or read book The Effect of Nitrogen Fertilizer induced Acidity and Liming on Soil Nutrient Relationships Yield and Uptake Patterns by Soybeans Glycine Max L Merr written by Yousef Aharchi and published by . This book was released on 1987 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Optimizing Soybean Glycine Max L Yield with Nitrogen and Sulfur Applications

Download or read book Optimizing Soybean Glycine Max L Yield with Nitrogen and Sulfur Applications written by Kacey A. Cannon and published by . This book was released on 2017 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although soybean (Glycine max L.) yields have increased over the past decade, even greater improvement is in demand. Nontraditional practices such as applying nitrogen (N) to soybean for yield optimization, might be one way to meet this demand. Also, sulfur (S) is becoming a more important limiting nutrient in production due to higher yielding crops, lower S containing production inputs, and reduced supply from the environment. The N study involved two environments, irrigated and dryland, in Milan (35.9198° N, 88.7589° W) and Jackson (35.6145° N, 88.8139° W), TN in 2015 and 2016. Urea fertilizer treatments were 34, 67, and 101 kg N ha−1 (per hectare). Soybean height, nodes per plant, total biomass weight, biomass N concentration, total nodules per plant, total active nodules per plant, total adolescent nodules per plant, total nodule weight per plant, 100 seed weight, and yield were collected to evaluate treatment effects. Data analysis concluded that N applications significantly increased plant height, plant nodes, and plant biomass of soybean. However, N treatments significantly reduced active and adolescent nodule production. Soybean yield was not significantly increased by the N applications. The irrigated sites yielded at or below the dryland comparison, probably due to lodging, which may have compromised yield potential. The S study included soybean and corn (Zea mays L.) experiments, which were conducted in an S deficient soil in Milan, TN in 2015 and 2016. Ammonium sulfate treatments were 11, 23, and 34 kg S ha−1 (per hectare). Plant height, leaf S concentrations, seed S and N concentrations, 100 seed weight, and yield were collected to evaluate treatment effects. Data analysis concluded that S application significantly increased leaf S concentrations in corn but not soybean. Soybean and corn seed S was significantly increased but not seed N. Soybean yield was not increased, but corn yield was significantly increased 16% across all S rates, with no significant differences detected among S rates. Overall, results indicate N affected soybean growth and nodule development while the impact on yield was not demonstrated. In deficient soils, S fertilizer may improve corn yields, but may not be economical for soybean.

Book Assessment of the Rotational Influence and Nitrogen Contribution of Soybean Glycine Max L Merr to Subsequent Crops

Download or read book Assessment of the Rotational Influence and Nitrogen Contribution of Soybean Glycine Max L Merr to Subsequent Crops written by Timothy S. Maloney and published by . This book was released on 1995 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Study of Nitrogen Limitation and Seed Nitrogen Sources for Historical and Modern Genotypes in Soybean

Download or read book Study of Nitrogen Limitation and Seed Nitrogen Sources for Historical and Modern Genotypes in Soybean written by Osler Antonio Amador Ortez and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean [Glycine max (L.) Merr.] yields have continuously increased over time. Seed yields are determined by the genotype, environment, and management practices (G × E × M) interaction. Closing yield gaps require a continuous improvement in the use of the available resources, which must be attained via implementation of better management decisions. Linear relationships between seed yield and nitrogen (N) demand are reported in the scientific literature. Main sources of N to the plant are the biological N fixation (BNF) and the soil mineralization processes. On overall, only 50-60% of soybean N demand is met by the BNF process. An unanswered scientific knowledge is still related to the ability of the BNF to satisfy soybean N demand at varying yield levels. Seed N demand not met by N fixation plus soil mineral N, is then fulfilled by the remobilization of N from vegetative organs during the seed filling period. An early remobilization process reduces the photosynthetic activity (leaves) and can limit seed yield. The objectives of this project were to: i) study yield improvements and contribution of N via utilization of contrasting N conditions under historical and modern soybean genotypes, and ii) quantify main seed N sources during the seed filling period. For objective one, four field experiments were conducted during the 2016 and 2017 growing seasons in Kansas, United States (US) and Santa Fe Province, Argentina (ARG). Those experiments investigated twenty-one historical and modern soybean genotypes with release decades from 1980s to 2010s. As for objective two, three field experiments were conducted during the 2015 and 2016 growing seasons in Kansas, US, studying three soybean genotypes: non-roundup ready (RR), released in 1997; RR-1, released in 2009; and RR-2, released in 2014. Across all studies, seeds were inoculated and tested under three N management strategies: i) control without N application (Zero-N); ii) 56 kg N ha−1 applied at reproductive growth stages (Late-N); and iii) 670 kg ha−1 equally split at three timings (Full-N). As for yield improvements and N limitation, soybean yield improvements from the 1980s to 2010s were documented, representing 29% increases in the US and 21% in ARG. Regarding N management, the Full-N fertilization produced a 12% increase in seed yields in the US and 4% in ARG. As for main seed N sources in objective two, remobilization accounted for 59% of seed N demand, and was negatively related to new N uptake occurring during the seed filling period. Seed N demand for greater yields was dependent on both, N remobilization and new N uptake, while for lower yields, seed N demand was mainly supported by the N remobilization process. These results suggest that: a) high seed yields are somehow limited by the availability of N to express their potential, although the question about N application still remains to be fully investigated, as related to the timing and the environment by plant interactions that could promote a N limitation in soybeans; b) remobilization accounts for majority (59%) of N sourced to the seed, and c) high yielding soybean (modern genotypes) rely on diverse N sources: the N remobilization process plus new uptake of N.

Book A New Technology of Deep Placement of Slow Release Nitrogen Fertilizers for Promotion of Soybean Growth and Seed Yield

Download or read book A New Technology of Deep Placement of Slow Release Nitrogen Fertilizers for Promotion of Soybean Growth and Seed Yield written by Kaushal Tewari and published by Nova Biomedical Books. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean seeds contain a large amount of protein (about 35%), and there is a significant correlation between the total amount of N accumulated in soybean plants and seed yield. Soybean utilises N from several sources, including mineralised soil organic matter, symbiotically fixed N, and N from fertiliser when applied. Soybean plants fix a large amount of N by root nodules symbiotically associated with soil bacteria called "rhizobia". However, sole N2 fixation is often insufficient to support the vigorous vegetative and reproductive growth of soybean plants. For the maximum yield of soybean, it is necessary to use both N2 fixation by root nodules and nitrogen absorption from roots. This book introduces the promotive effects of deep placement of slow release N fertilisers on growth, N2 fixation activity and seed yield of soybean cultivated in some rotated paddy fields of Niigata prefecture, Japan, including rotated paddy fields and upland fields.

Book Fertilizer Abstracts

Download or read book Fertilizer Abstracts written by and published by . This book was released on 1971 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Comprehensive Survey of International Soybean Research Genetics Physiology Agronomy and Nitrogen Relationships

Download or read book A Comprehensive Survey of International Soybean Research Genetics Physiology Agronomy and Nitrogen Relationships written by James E. Board and published by . This book was released on 2013 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean is the most important oilseed and livestock feed crop in the world. These dual uses are attributed to the crop's high protein content (nearly 40% of seed weight) and oil content (approximately 20%); characteristics that are not rivaled by any other agronomic crop. Across the 10-year period from 2001 to 2010, world soybean production increased from 168 to 258 million metric tons (54% increase). Against the backdrop of soybean's striking ascendancy is increased research interest in the crop throughout the world. Information in this book presents a comprehensive view of research efforts in genetics, plant physiology, agronomy, agricultural economics, and nitrogen relationships that will benefit soybean stakeholders and scientists throughout the world. We hope you enjoy the book.

Book Nitrogen Fixation in Agriculture Forestry Ecology and the Environment

Download or read book Nitrogen Fixation in Agriculture Forestry Ecology and the Environment written by Dietrich Werner and published by Springer Science & Business Media. This book was released on 2005-10-24 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainability has a major part to play in the global challenge of continued development of regions, countries, and continents all around the World and biological nitrogen fixation has a key role in this process. This volume begins with chapters specifically addressing crops of major global importance, such as soybeans, rice, and sugar cane. It continues with a second important focus, agroforestry, and describes the use and promise of both legume trees with their rhizobial symbionts and other nitrogen-fixing trees with their actinorhizal colonization. An over-arching theme of all chapters is the interaction of the plants and trees with microbes and this theme allows other aspects of soil microbiology, such as interactions with arbuscular mycorrhizal fungi and the impact of soil-stress factors on biological nitrogen fixation, to be addressed. Furthermore, a link to basic science occurs through the inclusion of chapters describing the biogeochemically important nitrogen cycle and its key relationships among nitrogen fixation, nitrification, and denitrification. The volume then provides an up-to-date view of the production of microbial inocula, especially those for legume crops.