One of the major reasons for decline in agriculture is the large-scale nutrient depletion through crop harvest and low level of
replenishments through inadequate nutrient use causing negative nutrient balance in the system.
Deterioration in the physical and biological properties of soil is further with holding crop yield.
At present, Indian agriculture is facing with a major problem of declining factor productivity. It
needed immediate remedial measures to ensure food security at present and in the coming years for
the long time. To achieve the goal of improving agricultural growth rate, we have to stream line
the practices of nutrient management, which require intensive forms of soil and crop
which will increase the efficiency of production inputs and protect the environment as
well as soil health. Moreover, during the past several decades' agriculture development
mainly focused on short term gains in productivity and profitability which has caused several
damage to soil fertility, health and environment. These changes motivated to
change in farming practices.
Organic farming seems to be a viable alternative because it enable the soil,
strengthen the natural resource base and sustains the biological production at different
levels. However, it requires large-scale organic manures and bio fertilizers. Acute
shortage of conventional bulky organic manures like compost, FYM, dung, oil cakes etc. also
necessitates the exploitation of other organic sources.
Weeds are plant which are unwanted to crop and other livings, they are found in abundant quantity
in crop fields, non-cropped areas, as well as in water bodies. These weeds are rich
in organic matter and contain handsome quantity of plant nutrients. Though, the much
attention has not been paid in order to harness the potential of these weeds and wastes
generation from agriculture farm as a source of organic manure. Obnoxious weed viz. Ipomea,
Waterhyacinth, Parthenium etc. are growing and spreading at alarming rate under non cropped and
aquatic ecology. They are nuisance at their growing place and have not any economic
importance in our livelihood.
