305 research outputs found
Nutrient management for rainfed lowland rice in northeast Thailand
No full textAbstract not availableS.M. Haefele, Y. Konboo
Agro-economic evaluation of fertilizer recommendations for rainfed lowland rice
No full textAbstract not availableS.M. Haefele, N. Sipaseuth, V. Phengsouvanna, K. Dounphady, S. Vongsouth
Climate ready rice: augmenting drought tolerance with best management practices
No full textAbstract not availableStephan M. Haefele, Yoichiro Kato, Sudhanshu Sing
Effects and fate of biochar from rice residues in rice-based systems
No full textAbstract not availableS.M. Haefele, Y. Konboon, W. Wongboon, S. Amarante, A.A. Maarifat, E.M. Pfeiffer and C. Knoblauc
Characteristics and management options for rice–maize systems in the Philippines
No full textAbstract not availableS.M. Haefele, N.P.M. Banayo, S.T. Amarante, J.D.L.C. Siopongco, R.L. Mabes
Transpiration efficiency of rice (Oryza sativa L.)
No full textAbstract not availableS.M. Haefele, J.D.L.C. Siopongco, A.A. Boling, B.A.M. Bouman, T.P. Tuon
Sustainable gasification–biochar systems? A case-study of rice-husk gasification in Cambodia, Part II: Field trial results, carbon abatement, economic assessment and conclusions
No full textAbstract not availableSimon Shackley, Sarah Carter, Tony Knowles, Erik Middelink, Stephan Haefele, Stuart Haszeldin
Sustainable gasification-biochar systems? A case-study of rice-husk gasification in Cambodia, Part I: context, chemical properties, environmental and health and safety issues
No full textAbstract not availableSimon Shackley, Sarah Carter, Tony Knowles, Erik Middelink, Stephan Haefele, Saran Sohi, Andrew Cross, Stuart Haszeldin
Spatial variability of fertilizer management and response in rainfed rice of Nepal
No full textAbstract not availableS.M. Haefele, B.K. Bhattachan, B.B. Adhikari, C.C. Abon Jr., S.M. Shrest
Assessment of soil biological quality index (QBS-ar) in different crop rotation systems in paddy soils.
No full textNew methods, based on soil microarthropods for soil quality evaluation have been proposed by some Authors.
Soil microarthropods demonstrated to respond sensitively to land management practices and to be correlated with
beneficial soil functions. QBS Index (QBS-ar) is calculated on the basis of microarthropod groups present in a
soil sample. Each biological form found in the sample receives a score from 1 to 20 (eco-morphological index,
EMI), according to its adaptation to soil environment. The objective of this study was to evaluate the effect of
various rotation systems and sampling periods on soil biological quality index, in paddy soils. For the purpose
of this study surface soil samples (0-15 cm depth) were collected from different rotation systems (rice-rice-rice,
soya-rice-rice, fallow-rice and pea-soya-rice) with three replications, and four sampling times in April (after field
preparation), June (after seedling), August (after tillering stage) and October (after rice harvesting). The study
area is located in paddy soils of Verona area, Northern Italy. Soil microarthropods from a total of 48 samples
were extracted and classified according to the Biological Quality of Soil Index (QBS-ar) method. In addition soil
moisture, Cumulative Soil Respiration and pH were measured in each site. More diversity of microarthropod
groups was found in June and August sampling times. T-test results between different rotations did not show
significant differences while the mean difference between rotation and different sampling times is statistically
different. The highest QBS-ar value was found in the fallow-rice rotation in the forth soil sampling time. Similar
value was found in soya-rice-rice rotation. Result of linear regression analysis indicated that there is significant
correlation between QBS-ar values and Cumulative Soil Respiration
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