Soil quality changes under continuous cropping for seventeen seasons of an alfisol in western Nigeria

Simulated Study on Effects of Ground Managements on Soil Water and Available Nutrients in Jujube Orchards

“…GMs did not reduce AN and AP concentrations in erosion, compared with CC; however, they distinctly decreased the amount of AN and AP loss in sediment, which agreed with a previous study in the area (Yang et al , ). ST showed a relatively high nutrients loss in our study, which in accordance with the pervious study included ST could lead to decreased soil quality and crop yields (Lal, ). The AN and AP loss under CC were 3·5 ± 1.6 mg and 3·1 ± 1·2 mg, and significantly greater than that under GMs ( p < 0·05).…”

Deforestation and Subsequent Cultivation of Nutrient Poor Soils of Miombo Woodlands of Tanzania: Long Term Effect on Maize Yield and Soil Nutrients

“…Generally, a depletion of soil nutrients due to permanent conversion and subsequent continuous cultivation of miombo woodlands was not observed in this study. This is contrary to other studies, which have reported soil nutrient declines following deforestation and subsequent continuous cultivation e.g., [16,20,22,39]. However, the results regarding K and P from this study are comparable to those of [20] where higher concentrations of exchangeable K (cmoles kg −1 ) and P (mg kg −1 ) were observed in croplands cultivated for up to 53 years in comparison with soils in tropical dry Afro-montane forest, at both 0-10 cm and 10-20 cm soil depths.…”

Effect of tillage on growth, yield and nutrient uptake in wheat after rice in the Indo-Gangetic Plains of India

“…Tillage 39 increases mineralization of nitrogen through breakdown of organic matter (So et al 2001), which may increase crop yield in the short term but in the longer term CT degrades soil organic matter which reduces soil fertility and structural stability. In contrast the zero tillage system may provide a greater amount of organic matter in the surface soil (Lal 1998). Significantly greater available soil P and K were recorded in CT as found by Franzluebbers & Hons (1996).…”