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Optimizing Nitrogen Application in Onion (Allium cepa L.): Influence of Rate and Time of Topdressing on Growth, Yield and Quality | Chapter 10 | New Perspectives in International Plant and Soil Research Vol. 1

Onion (Allium cepa L.) is an important commercial vegetable crop grown by small-holder farmers in Kenya for both local and export markets. The national average production is low and quality is highly compromised due to use of low yielding varieties and poor agronomic practices. Field experiments on the influence of nitrogen and time of application on growth, yield, and quality of onion bulbs were conducted in 2014 and 2015 at the National Agricultural Research Laboratories. The experiments were laid out in a Randomized Complete Block Design (RCBD) with a split-split arrangement and replicated three times. Nitrogen (N) was applied as Calcium Ammonium Nitrate at five levels including, 0 (control), 26, 52, 78 and 104 kg N ha-1. These were applied at four different times of applications at three, six, nine and twelve weeks after transplanting. Two onion varieties popularly grown in Kenya were used, the Red Creole and Red Tropicana F1 hybrid. Nitrogen and time of application showed signi...

Analysis on Local Food and Agrochemical Concept | Chapter 02 | Recent Advances in Biological Research Vol. 4

Aims: To distinguish between the defining attributes of local food and agrochemical concept as well as its irrelevant structure. Study Design: Wilson concept analysis consists of comparison of data units abstracted through selective literature and website review. Place and Duration of Study: Sample: articles and website available on the internet, from 2016 until 2017. Methodology: Sample: We included 14 sources, including articles and website. Analysis employed in this research consists of determine differences of attributes and internal structure; contrary cases is an instance that is absolutely sure not an example; a related case is close to model case; an invented case is if concept is rare or is very familiar; social context that is related to culture; and a practical result that is implications to make a difference in live. Results: Local food idea contrast from halal food idea. Meanwhile, agrochemical refers to monoculture present in...