Mulch decomposition and nitrogen, phosphorus and potassium release in vetiver grass at different plant densities

Nutritional and Antinutritional Components of Vetiver Grass (Chrysopogon zizanioides L. Roberty) at Different Stages of Growth

Vetiver grass was harvested at 4, 6 and 8-week old re-growth. The chemical composition and quantitative analyses of anti-nutritional components were determined. The result showed that dry matter and fiber content increased with age while crude protein, mineral content and anti-nutritional components reduced with age. It was concluded that age of re-growth significantly affect the nutrient and a...

Evaluation of Basil (Ocimum basilicum L.) Essential Oil Content and Yield under Different Plant Densities and Nitrogen Levels

A study was conducted to investigate the effect of different planting densities and nitrogen doses on essential oil content and yield in herb and leaves of basil (Ocimum basilicum L.). The research was conducted during 2007 and 2008 using split-plot randomized complete block design with four replications. The experiment consisted of four plant densities (30×20, 40×20 and 50×20 cm) as the main p...

Modeling the soybean growth in different amount of nitrogen, phosphorus and potassium using neural network

This paper proposed a simulation model of soybean growth which is effected by major nutrient factors, nitrogen, phosphorus and potassium. A feedforward neural network is used as a basis of the modelling. The combination of different percentage of nitrogen, phosphorus, potassium, time steps and the collected height data of the soybean are used as inputs. The model can predict the height at desig...

Studying the quantitative and qualitative characteristics of vetiver grass (Chrysopogon zizanioides L.) under different compost and zeolite treatments

Investigation on the Effects of Eco-cover on Unwanted Plant Control, Vetiver Grass (Vetiveria zizanioides) Growth and Soil Properties

Eco-cover is ecological mulch and its application is an eco-friendly and low-cost method to improve soil environment and prevention of unwanted plants. The aim of this study was to investigate the effects of eco-cover on unwanted plants, Vetiver grass (Chrysopogon zizanioides) growth and soil Properties. For this purpose, two series of rectangular plot (with and without eco-cover), in three rep...