Differences of growth and seed of Isatis indigotica sown in various sowing times Effect of genotype and sowing time on growth, development and yield of high quality wheat Sweet Sorghum Cultivation Techniques Effects of sowing times on the spike differentiation of different wheat varieties under the climate of warm winter Effects of Sowing Date on Tuber Growth and Main Medicinal Components of Corydalis decumbens Path Analysis between Yield of Spring Maize and Meteorological Factors at Different Sowing Times in North China Low Plain Effects of Sowing Time on Spring Maize (Zea mays L.) Growth and Water Use Efficiency in Rainfed Dryland