Following procedure can be followed for making Parthenium compost:
Make a pit of 3x 6x10feet (depth x width x length) at a place where water dose not stagnate. Pit size can be increased or decreased but depth cannot be compromised. If possible, cover the surface and sidewalls of the pit with stone chips. It will protect absorption of essential nutrient of compost by the soil surface. If stone cheep is not available, make soil surface compact. Arrange about 100 kg dung, 10 kg urea or rock phosphate, soil (1-2 Quintals) and one drum of water near the pit. Collect all the Parthenium plants from your field and nearby area. Spread about 50 kg of Parthenium on the surface of pit. Over this sprinkle 500 gm urea or 3 kg rock phosphate. If possible, add Trichoderma viridi or Trichoderma harziana (kind of fungi cultured powder) in the amount of 50 gm per layer. All the above constituents will make one layer. Like first layer make several layers till the pit is filled up to 1 fit high from the ground surface. Fill the pit in dome shape. While making layers, apply pressure by feet to make weed biomass compact. If there is no soil with Parthenium roots than add 1012kg of loamy soil on each layer. When pit is full with above-described layers then cover it with mixture of cow dung, soil and husk. After 4-5 months we can get well decomposed compost. We can get 37–45% of compost from 37-42 quintals of Parthenium biomass.
