( Garrett and Grisham, 1995 ). The anaerobic-to-aerobic (ANA) ratio index, a seed quality test, uses the ratio of anaerobic (AN) and aerobic (A) ethanol production in seeds and was developed as a rapid, sensitive, predictive indicator of seed quality
The growth and development of vegetables require a large amount of nitrogen and potassium ( Balliu and Bro, 2002 ; Hebbar et al., 2004 ). Potassium application and its balanced relative ratio to nitrogen are the most important for the crop
fraction of total carbon under the high tunnel ( P = 0.23), or POM carbon under the high tunnel in ratio to the adjacent field ( P = 0.45). Salinity. Mineral surface deposits reported by growers could potentially indicate salt accumulation near
-plant transpiration was reduced under elevated CO 2 for both a soybean (C 3 ) and a sorghum (C 4 ) crop. This reduction in transpiration, coupled with increased photosynthesis, can contribute to increased water use efficiency (WUE = the ratio of carbon fixed to water
. There exists a wide diversity in plants' responses to N sources, and how one species responds to various N sources or ratio of N sources cannot be used to predict how another species would respond. Hybrids of Phalaenopsis Blume. have become an
biomass was minimal (<0.1 Mg·ha −1 ). Table 2. Mean aboveground cover crop dry biomass, biomass total carbon (C), biomass total nitrogen, (N) and biomass C:N ratio in Spring 2011 and 2012. Vegetable crop weed density. Weed density 1 month following
). Foliar carbon content was lowest in plants from Utah, and the C:N ratio was similar among sources ( Table 3 ). Table 3. Carbon isotope discrimination, foliar carbon content, and carbon to nitrogen ratio of five seed sources of bigtooth maple
quadratic ( Q ) contrasts over time. Fig. 2. Total plant growth rate, rate of nitrogen (N) uptake from fertilizer, and carbon-to-nitrogen ratio (CN) of three Rhododendron cultivars grown in containers with (+N) or without (–N) additional N
). Nitrogen can be immobilized, volatilized, leached from plant roots, or be lost through runoff. Excessive N application leads to increased production costs and may cause contamination of ground and surface water sources as a result of runoff. Therefore
Bahiagrass to nitrogen fertilization Agron. J. 52 453 455 Blanco-Canqui, H. Lal, R. 2004 Mechanisms of carbon sequestration in soil aggregates Crit. Rev. Plant Sci. 23 481 504 Bormann, F.H. Balmori, D. Geballe, G.T. 1993 Redesigning the American lawn Yale