Biomass growth wheat

Copper exhibits rhizotoxicity in wheat seedlings [17]. Copper and chromium retard shoot and root growth of barley [18]. The yield of wheat is decreased when soil is contaminated with cadmium oxide or zinc oxide [19]. Copper and nickel smelter-polluted soil retards biomass growth of pine trees and reduces the essential calcium, potassium, and magnesium contents of sapUngs [20]. Cadmium in the soil reduces ryegrass growth with crop yields inversely proportional to cadmium content [21]. 

At both locations, morningglory was the predominant weed species. During the growing season, morningglory plant counts and biomass data were obtained to evaluate the effects of wheat residues and tillage on morningglory growth. 

The samples used in the study comprised various biomasses and a selection of Danish straws. The analyses of the fiiels used in the study are presented in Tables 1 and 3, and the chemical composition of ash, together with a summary of the thermobalance sintering tests, in Tables 2 and 4. The Danish wheat straw qualities were selected on the basis of growth site, fertilising and weathering conditions [9],... 

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