Nitrogen (N) is the most important nutrient added to turf ( Hull and Bushoven, 2001 ; Landschoot and Waddington, 1987 ). Nitrate (NO 3 ) and ammonium (NH 4 ) are the primary sources of N used for synthesis of amino acids, proteins, enzymes, nucleic
). Soils contaminated by hydrocarbons become hydrophobic, which reduces the availability of the water-soluble nutrients ( Everett, 1978 ). Also, the elevated carbon content in hydrocarbon-contaminated soil causes an increased carbon (C) to nitrogen (N
aboveground biomass was determined. Dried subsamples of leaf blade, petiole, stem, and fruit were analyzed to determine the total Kjeldahl nitrogen concentrations using the combustion technique ( O’Dell, 1993 ). Shoot N accumulation was determined by
.1046/j.1365-3040.2000.00609.x Hocking, P.J. Meyer, C.P. 1985 Responses of noogoora burr ( Xanthium occidentale Bertol.) to nitrogen supply and carbon-dioxide enrichment Ann. Bot. (Lond.) 55 835 844 10
Photosynthesis and nitrogen relationships in leaves of C3 plants Oecologia 78 9 19 Frantz, J.M. Bugbee, B. 2005 Acclimation of plant populations to shade: Photosynthesis, respiration, and carbon use efficiency J. Amer. Soc. Hort. Sci. 130 918 927 Gardner, D
disposal and nitrogen pollution of the environment posed serious implications for the industry ( Skimina, 1980 ). Extensive research by that company led to the construction at the Azusa site of a water recycling plant capable of processing 5.3 × 10 6 L
+ ratio on photosynthetic rate, nitrate reductase activity and chloroplast ultrastructure in three cultivars of red pepper ( Capsicum annuum L.) J. Plant Physiol. 140 298 305 Troyanos, Y. Roukounaki, E. 2011 Response of young olive trees to nitrogen
following leguminous crops that have a lower carbon (C):N ratio and a higher N cycling (N mineralization) potential, such as red clover ( Trifolium pratense ) and alfalfa ( Medicago sativa ). Conversely, Neeteson (1988) reported lower yields were observed
reported as percentages of the untreated control in accordance with an agreement made with our grower collaborator. Table 4. Carbon dioxide (CO 2 ) assimilation, g S , and leaf fluorescence (ratio of variable fluorescence to maximum fluorescence) before CO
biomass, carbon (C) and N concentrations, and C:N ratio. In 2018, sunn hemp plants were separated into leaves and stems for measurements of biomass dry weight and C and N concentrations. Plant biomass was dried at 65 °C for 7 d to determine dry weight