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Optimizing cellulosic ethanol yield depends strongly on understanding the biological variation of feedstocks. Our objective was to study variation in capacity for producing fermentable sugars from straw of winter wheat cultivars with a high-throughput pretreatment and hydrolysis well-plate technique. This technique enabled us to estimate cultivarrelated and(More)
 A detailed size separation of particulate organic matter (POM) from soils amended with straw from Hordeum vulgare or Vicia sativa revealed that the loss of C during the first 56 days of incubation mainly occurred from particles >2,000 μm, without a concomitant reduction in the size of these large particles. Preliminary studies of POM from non-amended soil(More)
A collection of 100 wheat varieties representing more than 100 years of wheat-breeding history in Scandinavia was established in order to identify marker-trait associations for plant height (PH), grain yield (GY), and biomass potential for bioethanol production. The field-grown material showed variations in PH from 54 to 122 cm and in GY from 2 to 6.61 t(More)
Carbon and nitrogen loss patterns from stems and leaves from Elephant grass (Miscanthus × ogiformis Honda cv. Giganteus), and five commonly used cover crop species: Hairy vetch (Vicia villosa Roth), Italian ryegrass (Lolium multiflorum L.), Crimson clover (Trifolium incarnatum L.), Rye (Secale cereale L.), and Radish (Raphanus sativus L.) were examined at 3(More)
Managing phosphorus (P) losses in soil leachate folllowing land application of manure is key to curbing eutrophication in many regions. We compared P leaching from columns of variably textured, intact soils (20 cm diam., 20 cm high) subjected to surface application or injection of dairy cattle (Bos taurus L.) manure slurry. Surface application of slurry(More)
Nutrient balances for the last two decades in Sub-Saharan Africa (SSA) reveal, almost unequivocally, alarming nutrient deficiencies. The nutrient balancing in SSA was initiated by Stoorvogel and Smaling [Report 28, Winand Staring Centre, 1990] and Smaling et al. [Fert. Res. 35 (2003) 237]. Their nutrient monitoring (NUTMON) concept is conducted as(More)
Soil fertility management in organic systems, regulated by the organic standards, should seek to build healthy, fertile soils and reduce reliance on external inputs. The use of nutrients from conventional sources, such as animal manures from conventional farms, is currently permitted, with restrictions, in the organic regulations. However, the reliance of(More)
A study was made to quantify early root development, soil exploitation and nutrient uptake in spring wheat, onion and lettuce, and their variation among cultivars. The goal was to study genetic variation in root traits making cultivars better adapted to organic production systems or other low-input systems. Six cultivars of each species were grown in(More)
To explore the options for recycling of nutrients from mega-cities to agricultural land, a nutrient balance model was developed. The balancing was done for Bangkok Province and considered nitrogen (N) and phosphorus (P). To estimate the food supply, the most decisive nutrient flow, an online database (FAOSTAT) was employed; its country level data are(More)
By using denaturing gradient gel electrophoresis (DGGE) and simultaneously measuring the enzymatic activity of chitinase, we could link genetic diversity of the indigenous microbial communities with chitinase activity in compost samples. A garden/park waste compost and a source separated organic household waste compost, showed different genetic diversity as(More)