Sunflower summer-planting yield as affected by plant population and nitrogen application rates

Sunflower morphology and yield as affected by foliar applications of plant growth regulators

Plant height of sunflower is a major agronomic trait affecting crop performance in the field and its adaptation to mechanical harvest. Field experiments were conducted to study the effect of foliar application of paclobutrazol (PBZ) at 12.5 g ai/ha, mepiquat chloride (MPC) at 25.0 g ai/ha and chlormequat chloride (CCC) at 1,500 g ai/ha in single or double applications on sunflower plant mor...

Growth and nitrogen content of sunflower as affected by the rate and form of nitrogen

Dryland Wheat Grain Yield and Yield Components as Affected by Slope Direction and Residue Rates

Limited information is available on the effect of residues rates and slope direction on dryland wheat (Triticum aestivum L.) yield.  This study was carried out to determine the effects of residues rates and tillage direction on grain yield and yield components of the Sardary wheat in a dryland region in Zanjan. Five wheat residues rates (0, 25, 50, 75 and 100% surface cover) were applied and i...

Sugarbeet Yield and Quality as Affected by Nitrogen Level

Thii study was conducted, under several climatic and soil conditions, to determine the effect of N level on beet yield and quality and to further develop and me both soil and tissue test methods for predicting N fertilizer needs for efficient refined sucrose production. Previous studies indicate that N fertilizer needs for =Wm= sucrose production may be predicted by con. sidering yieldpotential...

Corn Production as Affected by Nitrogen Application Timing and Tillage

could be optimized using modified NT systems (including ST) and starter fertilizer. In Iowa Mallarino et al. (1999) Utilizing conservation tillage practices and increasing fertilizer N found that ST frequently increased early growth but seluse efficiency for corn (Zea mays L.) are necessary for optimizing dom increased corn grain yields compared with NT. growers’ profits and for minimizing loss...

Winter Wheat Grain Yield and Grain Nitrogen as Influenced by Bed and Conventional Planting Systems

Bed planted wheat systems offer a new alternative for the traditional wheat producer to provide opportunities for crop rotation, more efficient use of water, and new techniques of nutrient management. This study was conducted to determine if planting winter wheat (Triticum aestivum L.) in Oklahoma on raised beds can maintain grain yields while providing more options in the cropping system. Expe...