Download or read book Effects of Harvest Date on Sweet Corn Maturity Sugar Content and Yield written by Yueh-mei Wong and published by . This book was released on 1978 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were conducted in 1976 and 1977 on the effects of harvest dates on maturity, yields and sugar content of four cultivars of sweet corn. The cultivars were 'Golden Cross Bantam', 'Jubilee', 'Rapidpak' and 'Tendertreat'. Moisture content of kernels ranged from 80 to 67 per cent for the six harvest dates. A regression technique was used to estimate relationships of yield, percent moisture in kernels and sugar content to the six harvest dates. Relationships of yield and sugar content to percent moisture, content in kernels were also estimated. Yield of husked, acceptable (good) ears, which was used as a standard of yield estimation, was increased by a delay in harvest. The increase averaged 0.135 tons per acre for each day's delay in harvest for three cultivars in 1976 and 0.152 tons per acre per day in 1977. No evidence of linear or quadratic relationships between yield and harvest date were found for 'Tendertreat'. Kernel moisture loss was highly correlated with harvest date and degree hours. Kernel moisture loss averaged 0.687 per cent for each day's delay in harvest in 1976 and 0.577 per cent per day in 1977. Yield increases averaged 0.173 tons per acre for each one percent drop in moisture content of kernels for three cultivars in 1976 and 0.264 tons per acre percent moisture drop of kernels in 1977. Quantitative analysis of sugar content in kernel samples that had been frozen was made by using a gas chromatography technique. Total sugar and sucrose contents dropped most rapidly at early harvests, then decreased slowly. Average rate of sucrose decline was 0.579 per cent for each day of delay of harvest in 1976 and 0.226 per cent per day in 1977. Total sugar decreases averaged 0.589 per cent for each one percent drop in moisture content of kernels in 1976 and 0.304 per cent with each per cent moisture drop of kernels in 1977. Reducing sugar decreased rapidly as harvest was delayed and fructose decreased faster than glucose. There were differences in cultivars in initial sugar content and rapidity of loss as maturity progressed. It appears that a 1:10 ratio of fructose to sucrose may be related to good quality of kernels. The use of the accumulated heat unit system for predicting optimum maturity showed no increase in precision over the use of the number of days from planting to harvest. Proper timing of harvest and selection of cultivars need to be made, as well as giving consideration to other factors, to achieve optimum yields and sugar content of sweet corn.

Download or read book The Effects of Planting Date Nitrogen and Boron Application on Mineral Element Concentration Yield Dry Weight and Fresh Weight of Sweet Corn written by Jonathan Anthony Sisson and published by . This book was released on 1981 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of planting date on mineral element concentration in sweet corn (Zea mays L. cv. Jubilee) at six developmental stages and on yield were investigated. Planting dates were chosen to correspond to early, mid-season, and late commercial plantings. Two nitrogen rates were applied since nitrogen is more often limiting than any other nutrient for sweet corn grown in Western Oregon. Boron was also applied since it has been shown to be limiting in many other crops grown in the Willamette Valley. Planting date significantly affected N, P, K, Ca, Mg, Mn, Fe, Cu, B, and Zn concentration in the whole plants during the vegetative growth stages and in the ear leaves during the stages between tasseling and harvest. During the early stage of growth, N, P, K, Ca, Mg, B, and Zn tended to be higher in the early planted corn plants, while later in the development of corn the effects of planting date were more variable. Planting date also affected the fresh and dry weight of whole plants; the later planting produced more dry weight than the earlier two plantings, while the early planted corn produced more fresh weight at harvest than the later two plantings. Consequently, when analyzing sweet corn for nutritional status, date of planting should be considered when interpreting the plant analysis data. The application of B had no effect on yield, fresh weight or dry weight and only increased B concentration at the first developmental stage. The additional application of N, did not significantly increase yield for the late planted corn, but did for early planted corn. N concentration, as well as Mg, Mn, Cu, and Zn concentrations increased with the higher rate of N fertilizer applied (125 kg/ha). Fresh weight and dry weight were both higher in the plants receiving the higher rate of N, with the difference becoming greater as the plants matured.

Download or read book Commercial Growing of Sweet Corn written by Elbert Van Wann and published by . This book was released on 1966 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Sweet corn is grown commercially in more than 30 states. Growers have two outlets for their product -- processing plants and the fresh market. Requirements for growing high-yielding, high-quality crops for both outlets are practically the same."--Page 1.

Download or read book Farmers Bulletin written by and published by . This book was released on 1966 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Effect of Plant Density on the Seed Yield and Quality of Sweet Corn Zea Mays Saccharata and Harvest Date on the Seed Quality of Maize Zea Mays and Sweet Corn Zea Mays Saccharata written by Alfredo B. Escasinas and published by . This book was released on 1984 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Time of Nitrogen Application on the Yield written by Patrick Bioma Kiadii and published by . This book was released on 1967 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Economic Effects of Biofuel Production written by Marco Aurelio Dos Santos Bernardes and published by BoD – Books on Demand. This book was released on 2011-08-29 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aspires to be a comprehensive summary of current biofuels issues and thereby contribute to the understanding of this important topic. Readers will find themes including biofuels development efforts, their implications for the food industry, current and future biofuels crops, the successful Brazilian ethanol program, insights of the first, second, third and fourth biofuel generations, advanced biofuel production techniques, related waste treatment, emissions and environmental impacts, water consumption, produced allergens and toxins. Additionally, the biofuel policy discussion is expected to be continuing in the foreseeable future and the reading of the biofuels features dealt with in this book, are recommended for anyone interested in understanding this diverse and developing theme.

Download or read book Postharvest Handling written by Robert L. Shewfelt and published by Academic Press. This book was released on 2012-12-02 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: Postharvest Handling: A Systems Approach introduces a new concept in the handling of fresh fruits and vegetable. Traditional treatments have been either physiologically based with an emphasis on biological tissue or technologically based with an emphasis on storage and handling. This book integrates all processes from production practices through consumer consumption with an emphasis on understanding market forces and providing fresh product that meets consumer expectations. Postharvest physiologists and technologists across the disciplines of agricultural economics, agricultural engineering, food science and horticulture along with handlers of minially-processed products within the fresh produce fruit and vegetable processing industries will find this to be an invaluable source of information. - Uses a systems approach that provides a unique perspective on the handling of fresh fruits and vegetables - Designed with the applied perspective to complement the more basic perspectives provided in other treatments - Provides the integrated, interdisciplinary perspective needed in research to improve the quality of fresh and minimally processed products - Emphasizes that the design of handling systems should be market-driven rather than concentrating on narrow specifics

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book O S U Theses and Dissertations 1978 1982 written by Oregon State University and published by . This book was released on 1983 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin of the Maryland Agricultural Experiment Station written by Maryland Agricultural Experiment Station and published by . This book was released on 1928 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin of the Maryland Agricultural Agricultural Experiment Station written by and published by . This book was released on 1928 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canning Trade written by and published by . This book was released on 1919 with total page 2154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Weekly Weather and Crop Bulletin written by and published by . This book was released on 1999 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Weekly Weather and Crop Bulletin written by Lucius W. Dye and published by . This book was released on 1998 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1987-10 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Maturity and Blanching on Carbohydrate Components of Frozen Normal Sweet su and Supersweet sh2 Corn written by Shanghe Su and published by . This book was released on 1989 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three varieties of sweet corn (Zea mays L.), including two supersweet (Crisp 'N Sweet 710 and Rogers 3376) and one normal sweet (Jubilee), were harvested at six stages of maturity (80-72% moisture for supersweet and 75-68% moisture for normal sweet) at three days intervals. Changes in physical and chemical properties over the 15 day harvest period and effects of steam blanching on carbohydrate composition of both genotypes of sweet corn were determined. Moisture content of the kernels decreased with maturity. A quick microwave oven moisture method for determining moisture content of normal sweet and supersweet corn was evaluated and found to be a good alternative method for the time-consuming standard AOAC vacuum oven method. Yield (as represented by average ear weight) increased linearly with maturity. Percent soluble solids was determined to be a satisfactory maturity index for normal sweet corn but not for supersweet corn. The pericarp content in the normal sweet corn Jubilee increased 25% over the 15-day harvest period compared to a mean of 5-6% in the supersweet varieties. Values of the shear press tests were not significantly correlated to % moisture, and only values of compression work showed a positive trend to increase with maturity. Total sugars of supersweet corn averaged 2-3 times higher and decreased more slowly than those of normal sweet corn in the comparable maturity range for processing. Sucrose was the major sugar in both corn genotypes and represented about 80% of the total sugars (9-20% dry weight) in normal sweet corn versus 90% of the total sugars (30-45%) in supersweet corn. Polysaccharides consisted mainly of starch in supersweet corn and of water soluble polysaccharide (WSP) in normal sweet corn. Normal sweet corn contained about twice as much polysaccharides as did supersweet corn. Percent total polysaccharides increased with maturity. Although higher in sugars, supersweet corn had lower % total carbohydrates than normal sweet corn due to its low polysaccharide content. Blanching of corn-on-the-cob for 10 minutes in 99°C steam resulted in a significant loss of sugars. Blanching did not significantly reduce total polysaccharides of sweet corn.