The use of silt pits (conservation pits) to conserve soil and water is a common practice in rubber plantations. The results of a field experiment to evaluate the effect of such pits on soil and moisture conservation and growth ans yield of rubber are discussed. The experimental area was well drained with an average slope of 17-22;. The treatments were conservation pits taken at the rate of 100, 150, 200 and 250 per ha with a no pit control. It was found that about 5-13t/ha/year of soil was conserved and thus prevented from being eroded when the number of silt pit was increased from 100 to 250 per ha. The quantity of nutrients conserved ranged from 13-34, 7-18 and 9-25kg/ha of N, P and K respectively. The data on quantity of soil deposited in the observation pits taken at the lower most part of the field indicated that when the number of pits was increased, the quantity of soil lost was considerably reduced. The plant response in terms of growth and yield for a period of 18 months did not indicate any significant difference between the treatments. The effect of silt pits on soil and leaf nutrient status is also discussed.