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  • 1
    Electronic Resource
    Electronic Resource
    Aspects of nitrogen fertilizer rate on tuber dry-matter content of potato cv. Record (1992)
    Springer
    Potato research 35 (1992), S. 127-132 
    Details
    ISSN: 1871-4528
    Keywords: processing ; tuber fresh weight ; Solanum tuberosum L
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Effects of three rates of fertilizer nitrogen, viz. 80, 160 and 240 kg N/ha, on tuber yield and dry-matter percentage in potato cv. Record were compared in two experiments. Crop nitrogen uptake increased with application rate but total uptake differed between experiments. Tuber yield was highest following application of 160 or 240 kg N/ha but differences between these two rates were not significant. Tuber dry-matter percentage was reduced in one experiment with increasing nitrogen rate, but in the second experiment final dry- matter percentage was highest following application of 240 kg N/ha. In all treatments, positive linear relationships were found between dry matter percentage and mean fresh weight of tubers 〉30 mm, but within experiments, the regression coefficients were generally reduced by increased crop nitrogen uptake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02357605
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    Paper (German National Licenses)
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  • 2
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    Mars In-Situ Propellant Production Precursor (MIP) Flight Demonstration Project: Overview (1999)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: Strategic planning for human missions of exploration to Mars has conclusively identified in-situ propellant production (ISPP) as an enabling technology. A team of scientists and engineers from NASA's Johnson Space Center, Jet Propulsion Laboratory, and Lewis Research Center is preparing the MARS ISPP PRECURSOR (MIP) Flight Demonstration. The objectives of MIP are to characterize the performance of processes and hardware which are important to ISPP concepts and to demonstrate how these processes and hardware interact with the Mars environment. Operating this hardware in the actual Mars environment is extremely important due to both uncertainties in our knowledge of the Mars environment as well as because of conditions that cannot be adequately simulated on Earth. The MIP Flight Demonstration is a payload onboard the MARS SURVEYOR Lander and will be launched in April 2001. MIP will be the first hardware to utilize the indigenous resources of a planet or moon. Its successful operation will pave the way for future robotic and human missions to rely on propellants produced using Martian resources as feedstock.
    Keywords: Engineering (General)
    Type: Abstracts In Situ Resource Utilization (ISRU 3) Technical Interchange Meeting: Abstracts; 17-18; LPI-Contrib-963
    Format: text
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    NASA TECHNICAL REPORTS
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