The Influence Of Cutting Treatments On Yield And Quality Of Two Alfalfa Medicago Sativa L Varieties
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The Influence Of Cutting Treatments On Yield And Quality Of Two Alfalfa Medicago Sativa L Varieties
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Author : David Contreras
language : en
Publisher:
Release Date : 1965
The Influence Of Cutting Treatments On Yield And Quality Of Two Alfalfa Medicago Sativa L Varieties written by David Contreras and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Alfalfa categories.
A field experiment was conducted to study the influence of cutting treatments on the yield and quality of non-irrigated alfalfa in western Oregon. Spring clipping treatments included (1) not clipped, (2) clipped when 6 inches high and (3) clipped when 12 inches high. The hay harvest criteria were (1) near full light interception by the vegetative canopy, (2) crown bud stage and (3) one-tenth bloom stage. Combinations of these criteria included first hay harvest based on light interception followed by either of the other criteria at subsequent harvests, and first harvest based on crown bud development in combination with one-tenth bloom criterion for subsequent harvest. Two alfalfa varieties, Vernal and Du Puits, were subjected to each of the 18 treatments (6 x 3 in all combinations). Results of one growing season indicated that the influence of spring clipping was not reflected in yield of dry matter (hay) except at the relatively small third harvest when spring clipping showed a deleterious effect. The yields obtained by the spring clipping were sufficient to offset the reduction at the third hay harvest. It was observed that the total yields for the season did not differ. Cutting at the one-tenth bloom stage showed an advantage in yield but with a greatly reduced crude protein percentage. Cutting on the basis of nearly complete light interception resulted in harvest at an immature stage in early May and at a very mature stage in late season. Highest yields, with leafiness and crude protein suitable for high quality hay, were obtained by cutting at the crown bud stage throughout the season, or by taking the first harvest on the basis of light interception and subsequent harvests on the basis of either crown buds or one-tenth bloom. The varieties produced approximately the same total for the season. Vernal was slightly leafier than Du Puits at the second and third hay harvests. A highly significant negative correlation was found between yield of dry matter and percentage protein and between yield of dry matter and leaf-stem ratio. The correlation between percentage protein and leaf-stem ratio was significant and positive.
The Influence Of Seeding Rate On Plant Population Yield And Quality Of Two Alfalfa Medicago Sativa L Varieties
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Author : Madhat M. Al-Hassani
language : en
Publisher:
Release Date : 1965
The Influence Of Seeding Rate On Plant Population Yield And Quality Of Two Alfalfa Medicago Sativa L Varieties written by Madhat M. Al-Hassani and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Alfalfa categories.
A field study was conducted in the Willamette Valley near Corvallis, Oregon, to determine the influence of seedling rate, drill row spacing, grass association, and variety on the yield of dry matter and quality (crude protein content and leafiness) of alfalfa. Treatments included seeding rates of 7.5, 10, 15 and 20 pounds per acre in various combinations with row spacings of 3, 6 and 12 inches. Orchardgrass (Dactvlis glomerata L.) was included tn three treatments. Complete data were obtained for three harvests and yield data only for an aftermath harvest. Alfalfa varieties were Vernal and DuPuits. Plant population and stem numbers per unit area increased with increasing seeding rates and with closer row spacing, but stem size, dry weight of the stems, leafiness and crude protein were not affected by seeding rate or row spacing. Grass grown in association with alfalfa did not influence any of the characteristics studied except for an increase in stem size at second harvest and increased protein content of the alfalfa at first harvest. Vernal and DuPuits yielded the same weight of dry material for the season. Vernal maintained a higher plant population, more stems per square foot at each harvest and a higher percentage of leaves than DuPuits. Stem size and weight and crude protein content of whole plants was higher in DuPuits than in Vernal. Both varieties decreased in yield, plant population, stem size and stem weight with each successive cutting. Stem number per square foot and per plant increased with each successive cutting. It was concluded that seedling rates from 7.5 to 20 pounds per acre and row spacings up to 12 inches had very little influence on quantity and quality of alfalfa hay production.
O S U Theses And Dissertations 1960 1965
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Author : Patricia A. Brandt
language : en
Publisher:
Release Date : 1967
O S U Theses And Dissertations 1960 1965 written by Patricia A. Brandt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
Osu Theses And Dissertations
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Author :
language : en
Publisher:
Release Date : 1967
Osu Theses And Dissertations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Dissertations, Academic categories.
Bibliography Of Agriculture
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Author :
language : en
Publisher:
Release Date : 1970
Bibliography Of Agriculture written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Agriculture categories.
Bibliographic Series
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Author : Oregon. Library. Forest Research Laboratory
language : en
Publisher:
Release Date : 1967
Bibliographic Series written by Oregon. Library. Forest Research Laboratory and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Bibliography categories.
Bibliographic Series
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Author :
language : en
Publisher:
Release Date : 1960
Bibliographic Series written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Oregon categories.
Low Lignin Alfalfa Cutting Management Study
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Author : Xuan Xu
language : en
Publisher:
Release Date : 2019
Low Lignin Alfalfa Cutting Management Study written by Xuan Xu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Alfalfa (Medicago sativa L.) is the fourth most valuable cash crop in the U.S., following corn, wheat, and soybean, and its production is vital to sustain the dairy, beef, and hay industries. As the world population increases alongside environmental degradation and water scarcities, identifying monthly climate variables related to alfalfa production can provide growers and researchers more time to deal with the effects of climate change. The purpose of Chapter 1 was to propose a statistical learning method to investigate, access, and predict the relationship between the alfalfa yield and monthly climate information with much larger numbers of variables in the state scale. To address the high-dimensionality of monthly climate variables, we employed a penalized regression model, called Lasso. Less than six relevant climate variables (i.e. monthly maximum and minimum temperature, and monthly precipitation) were identified as important predictors for alfalfa yields in each state. It was also shown that at least one of climate variables in June, July, and August was highly correlated to alfalfa yields. Reduction of lignin level in the forage legume alfalfa by the conventional breeding technology results in increased digestibility and may extend peak harvest dates by up to 10 days. This could benefit alfalfa growers by avoiding undesirable weather conditions, such as heavy rain, and increasing dry matter yield and nutritive values. The objective of Chapter 2 was to evaluate field performance and cash value of low lignin and reference variety under a four-cut system. The experiment was a split-plot design with a randomized complete block, the whole plot factor with two levels of variety and the subplot factor with six levels of harvest schedule. Forage yield differences among harvest schedules were more pronounced than yield differences between two varieties. Harvest interval had a significant effect on the nutritive value of alfalfa and a more substantial effect than variety selection. The nutritive value of low lignin alfalfa variety was significantly greater than the conventional variety. The purpose of Chapter 3 was to compare forage yield and nutritive value of low lignin alfalfa and two reference varieties subjecting to two harvest intervals and three seeding rates. The experimental design was in a split-split plot arrangement with four replicates, where harvest intervals (28-day and 35-day) were assigned to whole plots, seeding rates were subplots, and varieties were sub-subplots. The weighted mean nutritive value was applied to two production years of 2016 and 2017. Hi-Gest 360 (low lignin alfalfa) provided similar yield potential and increased nutritive value compared to two reference varieties. Harvest interval had a large effect on nutritive value and a more significant effect on alfalfa dry matter yield than variety selection. Seeding rate did not affect alfalfa yield and nutritive value. Based on two production year research in Manhattan, KS, the low lignin alfalfa variety under a shorter harvesting interval (every 28-day) appears be profitable management practice regardless of seeding rate.
Land Use Systems In Grassland Dominated Regions
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Author : A. Lüscher
language : en
Publisher: vdf Hochschulverlag AG
Release Date : 2004
Land Use Systems In Grassland Dominated Regions written by A. Lüscher and has been published by vdf Hochschulverlag AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
New Zealand Journal Of Agricultural Research
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Author :
language : en
Publisher:
Release Date : 1974-03
New Zealand Journal Of Agricultural Research written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974-03 with categories.