Effect of Silicate Slag Application on Wheat Grown Under Two Nitrogen Rates.

Field studies were established on the alluvial floodplain soils in Louisiana, from 2013 to 2015, to evaluate the effect of silicate slag applications on productivity of wheat (), under sufficient and high nitrogen (N) application rates. Treatments were arranged in a randomized complete block design, with four replications consisting of twelve treatments: a factorial combination of two N (101 and 145 kg N ha) and five silicate slag rates (0, 1, 2, 4.5, and 9 Mg ha), and two control plots (with and without lime).

Effect of Different Silicon Sources on Yield and Silicon Uptake of Rice Grown under Varying Phosphorus Rates.

A series of pot experiments were conducted to: (1) evaluate the effects of different Si sources (soil- and foliar-applied) on grain yield and Si accumulation of rice supplied with varying P rates, and (2) evaluate Si absorption of rice using foliar- and soil-applied Si fertilizers. Three P rates, (0, 112, and 224 kg ha) combined with five Si treatments (wollastonite and slag applied at 4.5 ton ha and one foliar Si solution applied at 20, 40 and 80 mg Si L) and a check were arranged in a randomized complete block design with four replications.

Estimating sugarcane yield potential using an in-season determination of normalized difference vegetative index.

Estimating crop yield using remote sensing techniques has proven to be successful. However, sugarcane possesses unique characteristics; such as, a multi-year cropping cycle and plant height-limiting for midseason fertilizer application timing. Our study objective was to determine if sugarcane yield potential could be estimated using an in-season estimation of normalized difference vegetative index (NDVI).