Trend of soil parameters under different spacings of Grewia based agroforestry system in the mid hill zones of Himachal Pradesh

Abstract

Soil under the 3 spacings (8m×1m, 8m×2m and 8m×3m) of a 14 year old Grewia optiva based alley cropping was analysed and compared to that in open condition after successful cultivation of garden pea with organic manures (poultry manure and vermicompost). The available nitrogen, phosphorus, potassium, electrical conductivity and organic carbon were significantly greater under agroforestry system than open condition and under agroforestry system it increased with decrease in spacing. However the trend was inverse for soil pH, which was found to be more acidic under agroforestry system.