Phosphorus adsorption and desorption properties of lunar simulants /
(QDT versus time) were obtained using the desorption
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (QDT versus time) were obtained using the desorption adsorption Q/I relationships were obtained by incubating adsorption, desorption and kinetic desorption Q/I and root weights were measured. Phosphorus concentrations applications should continue to be added to maintain adequate base, astronauts will grow crops to supply food, regenerate Because most of the applied P remained in solution, it was controlled conditions. After harvest, fresh leaf, dry leaf determine optimal P requirements for wheat. Phosphorus fertilizer rate that would provide optimal crop growth in However, due to the high value and limited amounts of lunar initial P application of 20 mg P/kg was adequate for wheat. interactions in lunar soil. The primary objective of this Laboratory studies indicated that both simulants did not Minnesota Basalt Lunar Simulant (MBLS) and Lunar Glass more P in solution than required, promoting inefficient use nutrient interactions in lunar soil must be understood. of P fertilizer. P/kg) be applied to the simulants. Additionally, small procedure; however, the resin was removed at intervals from 0 recommended that, initially, a small P application (10-20 mg relationships coupled with a wheat growth study were used to released to the resin. The wheat growth study showed that an research was to determine the most efficient phosphorus (P) Simulant (LGS). To achieve this objective, simulant P simulants and the amount of P adsorbed by the resin (QD) and simulants with P and analyzing for adsorbed P(QA) and soil, lunar simulants were used to approximate nutrient solution P (IA)' Simulant desorption samples were incubated solution P (ID) were determined. Kinetic desorption curves solution P levels. Larger applications would only introduce suitable levels of oxygen, remove carbon dioxide and recycle tightly adsorb P, and any P that was adsorbed was readily to 70 hours. Wheat was grown in MBLS for 50 days under To reduce resupply costs of a permanently inhabited lunar water (transpiration). To obtain efficient crop growth, were determined in leaves, roots and the MBLS solution. with P. Subsequently, anion-exchange resin was added to the |
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| Item Description: | "Major subject: Soil Science". Vita. |
| Physical Description: | xv, 142 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |