Greenhouse experiments

Information is contradictory about the contributions of root-derived C to the C pools available to the root zone and how this readily available C affects the subsequent associated microbial transformations of soil N (107). In a greenhouse experiment that involved growing maize plants and using C natural abundance and isotope "N techniques, 15% of the soil microbial biomass was derived from... 

Juarez-Rodriguez J, Fernandez-Luqueno F, Conde E, Reyes-Varela V, Cervantes-San-tiago F, Botello-Alvarez E, et al. Greenhouse gas emissions from an alkaline saline soil cultivated with maize (Zea mays L.) and amended with anaerobically digested cow manure a greenhouse experiment. Journal of Plant Nutrition. 2012 35(4) 511-523. DOI 10.1080/01904167.2012.644371... 

Fig. 9.7 Different growth of eggplant in a plastic greenhouse experiment in Southern Italy. In foreground a solarized plot, in the center a nonsolarized plot...

The two plants that seem to be the best bet for ridding one s home of such chemicals are ferns and palms. These plants release moisture as part of photosynthesis and, as they do, pull chemicals from the air into their leaves. Even NASA has conducted some greenhouse experiments for long-term space exploration. Within hours, their plants [palms] had removed almost all traces of formaldehyde in the room. Both species of plants are ancient, dating back more than a hundred million years. Another trait they share is that they both live long lives, 100 years or more. This we expect from trees, but ferns and palms are plants plants that can grow to 65 feet in the proper setting Even their individual leaves live for one to two years [ferns] and one to nine years [palms]. Perhaps it is their primal qualities that have contributed to their ability to purify their environment. 

Figure 9. Greenhouse experiment - soil / plant transfer of Ra.

The two plants that seem to be the best bet for ridding one s home of such chemicals are ferns and palms. These plants release moisture as part of photosynthesis and, as they do, pull chemicals from the air into their leaves. Even NASA has conducted some greenhouse experiments for long-term space exploration. Within... 

In a series of field and greenhouse experiments, a number of possible sources of Interference with black cherry growth were eliminated or shown to have minimal effect. White-tailed deer (Odocoileus virginianus) undoubtedly played a role in the establishment of orchard stands, but they are not responsible for their maintenance. About 30% of the seedlings we marked were clipped, whether or not they were protected with wire cages. The clipping characteristics were those of small mammals, not deer. 

Infestation of young lupin plants (greenhouse experiments) by Agromyzidae. About 50-1CX3 plants each were evaluated. 

Figure 2.8. Relationship between relative potassium (K) uptake and yield in greenhouse experiment and potassium release constant k, as determined by Ca- resin extraction. [From Havlin and Westfall (1985), with permission.]...

Air t,/2 = 11-14 d in greenhouse experiment, microagroecosystem chambers (Nash Beall 1980) ... 

Soil t,/2 = 23 d in 1-cm surface soil (sandy loam with pH 6.7), greenhouse experiment in microagroecosystem chambers (Nash Beall 1980) t,/2 = 16-23 d upper layer of soil (Howard 1991) ... 

There are two general approaches to the study of plant responses. One approach is the carefully designed greenhouse, field or pot experiments, where the observation of plant responses to soil factors are made. The alternative approach is the study of soils and plants in their natural environment. There are a number of drawbacks to the greenhouse experiments, for instance, reduction of time-scale in experiments creates uncertainty as to field relevance although reliable qualitative indications may be obtained (Folkeson et al., 1990). The responses of plants under artificial environmental conditions are usually not representative of the natural conditions (Irgolic and Martell, 1985). 

Copper Uptake by Ryegrass Grown in Calcareous Soil Amended with Sewage Sludge, Pig Manure, and Green Manure in Greenhouse Experiment... 

Formation of Pb phosphates in laboratory and greenhouse experiments as well as in held observations clearly demonstrates the stability of Pb phosphates in soils. Such data also provide a sound basis for using P to effectively immobilize Pb in soils. 

To interpret the behavior of Pu in experimental studies, it is important to define the chemical species present. The addition of Pu(IV) as nitrate or chloride salts to soil used in laboratory or greenhouse experiments does not guarantee that Pu polymer, Pu(VI), and possible other oxidation states are absent. The results... 

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