AGS 701 (Basics of Agricultural Systems)
Assignment No.3
1. Read: Thorn, P.J. and J.C. Tanner. 2002. Livestock and nutrient cycling in crop-animal systems in Asia. Agricultural Systems 71:111-126. Discuss:
 

a) The role of livestock in nutrient cycling of agricultural systems.
b) The role of livestock in promoting productivity and sustainability of agricultural systems.

2. You are requested to prepare the compost mixture from corn residue, weeds, and rice straw. The compost is expected to contain 50% moisture content and the C:N ratio of 30:1, the raw materials have the following ingredients:


 Raw Materials

 Wet weight (kg)

 C:N

 Moisture content %

 Manure

 5

 15:1

 50.0

 Grass clipping

 40

 33:1

 70.0

 Rice straw

 ?

 45:1

 15.0


What would be the quantity of rice straw you would need for to make the desirable compost mixture?


Due: July 6, 2004.