However, mean (across treatments) annual total C input from crop residues
was ~54% higher in plots under irrigated wheat than rainfed wheat (~734kg C/ha) (Table 4).
The heavy smog and haze in the Capital over the past three days is also blamed on the burning of crop residues
and vehicular emissions.
Use of crop residues
for fuel production has several key advantages over the use of edible or feed components, such as corn or other grains, but the conversion efficiency must improve before it is feasible to rely primarily on residues.
Burning of crop residues
also reduces microbial population [Raison (1979)] and organic carbon [Rasmussen, et al.
Nutrients tied up in crop residues
and organic matter are released into the soil system in a plantavailable form during decomposition and mineralisation.
Increases in SOM content in the 15-30 cm layers suggested that a fraction of the added organic manure and crop residues
was placed down to the 15-30 cm soil layers during incorporation operations or over the 5-year period of field experimentation.
One of the notable characteristics of the Indian livestock sector is that, almost its entire feed requirement is met from crop residues
and byproducts, grasses, weeds and tree leaves and grazing on common lands and harvested fields (Dikshit and Birthal, 2010).
Research suggests that agricultural and forestry crop residues
and urban and industrial waste streams could adequately supply a domestic biofuel industry.
In response, the four groups--Clean Air Task Force, Friends of the Earth, National Wildlife Federation and World Wildlife Fund--said EPA failed to require that producers verify that the crops and crop residues
used to produce renewable fuel complied with applicable land-use restrictions.
The environmental idea of recycling would have been a far better use of crop residues
to build up the soil and sustain agricultural productivity.
Dispersed on diversified farms, cattle can convert crop residues
into human food.
They are typically dominated by perennial rather than annual plants and tended with mulch, manure and crop residues
rather than industrial chemicals.
announces a technology breakthrough allowing commercial use of industrial enzymes to convert agricultural biomass, or crop residues
, into bio-ethanol.
In developing countries, where some two billion people rely on wood and crop residues
for cooking, simple devices like solar cookers can relieve pressure on the land.
They say politicians should try to kick start green energy projects using biomass fuels such as fast growing poplar, willow and elephant grass, as well as crop residues