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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Impact of planting date and seeding rate on grain and forage yields of wheat in Texas

Shaffer, Oliver Jacob 15 May 2009 (has links)
Wheat serves three very important roles to producers in Texas and many states in the Great Plains. First, wheat is used as a cool season forage crop for livestock grazing. Second, wheat serves as a grain only crop. Third, wheat is used as both a forage and grain crop in the same season and is commonly referred to as a dual-use or dual-purpose crop. Previous research has demonstrated that planting date can significantly affect the success of these various production strategies. When wheat is planted early, more forage will be available for livestock; conversely, a delayed planting date should achieve a higher grain yield. The objective of this research was to determine the optimum seeding rate as planting date changes for wheat as a grain-only and dual-purpose crop in central Texas. Six different planting dates were evaluated starting with a target date of September 1st and having 14 d intervals between each planting date. Seeding rates were 34, 67, 101, and 135 kg ha-1 for Agri-Pro Cutter wheat variety. Results from the three year study showed that planting date had the greatest impact on forage and grain yields. Higher seeding rates maximized grain yields at the later planting dates, while lower seeding rates yielded higher for the earlier dates. Forage yields were maximized when planted prior to October 1st, while grain yields were maximized at the mid-October to early-November dates. This research study demonstrated that producers could lower their seeding rates to between 34 and 67 kg ha-1 without sacrificing grain and season-long forage yields.
2

Date culture in ancient Babylonia

Pruessner, August Henry. January 1920 (has links)
Thesis (Ph. D.)--University of Chicago, 1920. / "Private edition, distributed by the University of Chicago libraries, Chicago, Illinois." "Reprinted from the American journal of Semitic languages and literatures, vol. XXXVI, no. 3, April 1920."
3

Date culture in ancient Babylonia

Pruessner, August Henry. January 1920 (has links)
Thesis (Ph. D.)--University of Chicago, 1920. / "Private edition, distributed by the University of Chicago libraries, Chicago, Illinois." "Reprinted from the American journal of Semitic languages and literatures, vol. XXXVI, no. 3, April 1920."
4

Date culture in ancient Babylonia /

Pruessner, August Henry. January 1920 (has links)
Thesis (Ph. D.)--University of Chicago, 1920. / "Private edition, distributed by the University of Chicago libraries, Chicago, Illinois." "Reprinted from the American journal of Semitic languages and literatures, vol. XXXVI, no. 3, April 1920." Also available on the Internet. Also issued online.
5

Salt Tolerance and Current Status of the Date Palms in the United Arab Emirates

Alhammadi, Mohamed Salman January 2006 (has links)
This study aimed to address the current status of the United Arab Emirates date palms. The first chapter focused on the development of the date palm sector in the UAE. A huge increase in the date palm number was achieved in the past few decades. In the same time, there are critical issues facing this development, such as water demand, salinity, and Red Palm Weevil. The second chapter is a greenhouse experiment to test the growth of twelve date palm seeds at four NaCl levels, control, 3000, 6000, and 12000 ppm. Optimal growth found at control and 3000 ppm of NaCl. Relative growth rate (RGR), biomass, and NL decreased significantly by increasing salinity; however, no significant differences were observed in the average SGR for any cultivars. Increased NaCl leads to significant decreases in K+, Mg2+, and Ca2+ contents of plants. Na:K ratios were lower in shoots than in roots. Lulu, Fard, Khnaizi, Nabtat Safi, and Razez cultivars showed higher RGR and biomasses whereas Khnaizi, Mesally, and Safri had higher Na:K ratios than other cultivars in the control indicating higher Na+ discriminations from plant parts. The third chapter studied the vegetation change in the eastern region of the UAE. Due to shortage of fresh water resources, the vegetation of the eastern region of the UAE has experienced a series of declines resulting from salinization of groundwater. To assess these changes, field measurements combined with Thematic Mapper (TM) and Enhanced Thematic Mapper Plus (ETM+) based Soil Adjusted Vegetation Index (SAVI) were analyzed. Images from two dates, 1987 and 2000 were acquired to enable the computation of the greenness anomalies for three sites in the eastern region, Fujairah, Kalba, and Hatta. The results show an overall increase in the agricultural area, associated with a severe decrease in vegetation greenness and health conditions, particularly in the Kalba study area. The SAVI values decreased with increased soil salinity, permitting the identification of salt-affected areas. Potential areas of further research range from studying the effects of tree spacing and understory crops as immediate and potential solutions to maintain productivity and mitigate the salinity problem.
6

A study of the pollen of Phoenix dactylifera with reference to its longevity and effect on the fruit

Albert, David Worth January 1927 (has links)
No description available.
7

Foliage classification study of Phoenix dactylifera

Hulet, David W. January 1925 (has links)
No description available.
8

A quantitative measurement of the vitamin A and B content of certain Arizona dates

Axline, Lucy Helen January 1928 (has links)
No description available.
9

Fall

Delotelle, Amanda J. January 2005 (has links)
The creative project involved writing and producing a short movie and an accompanying paper that described all facets of the scriptwriting and movie-making process. The movie, entitled "Fall," focuses on date rape and lying. The movie was based on research into date rape and Posttraumatic Stress Disorder. The movie chronicles a lonely young woman who has problems fitting in at her University. She can't seem to make friends and she feels inadequate among the other students. She wants attention and she gets it when she lies to a friend about being raped. As word of her "rape" spreads, people come together to console her. However, the lie eventually overwhelms her. / Department of Telecommunications
10

An investigation of soil salinization in Al-Hassa Oasis, Saudi Arabia

Al-Zokair, Abdulaziz A. January 2002 (has links)
No description available.

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