Uptake and conversion efficiencies of NPK and corresponding contribution toyield advantage in cotton-based intercropping systems Uptake and utilization of nitrogen, phosphorus and potassium as related to yield advantage in wheat/soybean intercropping The effect and mechanism of intercropping pattern on yield and economic benefit on the Loess Plateau INTERCROPPING ADVANTAGE AND CONTRIBUTION OF ABOVE- AND BELOW-GROUND INTERACTIONS IN WHEAT-MAIZE INTERCROPPING Effect of nitrogen application on intercropping advantages and crop interactions under an oil flax and soybean intercrop system