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P. Gweyi-Onyango Joseph

Publications (4)

Morphological Characteristics of Amaranthus cruentus and Amaranthus tricolor as Influenced by Integration of Organic and Inorganic Fertilizers in Kiambu County, Kenya

Kariithi Tabitha, Thagana Wilson & P. Gweyi-Onyango Joseph · Asian Research Journal of Agriculture · 2018

A field experiment was conducted to evaluate the effect of organic and inorganic fertilisers application on growth parameters of two amaranth varieties. Fifty-four treatments were evaluated as factorial combinations of organic manure applied at 16.9 t/ha, inorganic NPK fertiliser...

Open access Research Article 10.9734/ARJA/2018/39123

Effect of Organic and Inorganic Fertilizer on the Soil Chemical Properties of the Rhizosphere in Kiambu County, Kenya

Kariithi Tabitha, Thagana Wilson & P. Gweyi-Onyango Joseph · Asian Research Journal of Agriculture · 2018

The experiment was carried out at Kenyatta university farm using 2×3×3 factorial plan in a randomized complete block design. The experiment was carried out for two seasons. Pre cropping soil analsyis was carried out before and after the study to assess soil pH, macro and micro nu...

Open access Research Article 10.9734/ARJA/2017/37081

Comparison of Cationic and Anionic Forms of Nitrogen Fertilization on Growth and Calcium, Zinc and Iron Content in Shoots of Two Varieties of Vegetable Amaranth

Munene Rozy, Changamu Evans, Korir Nicholas & P. Gweyi-Onyango Joseph · Journal of Agriculture and Ecology Research International · 2017

Nitrogen (N) is an essential macro nutrient for plant growth and development. Plants absorb nitrogen in either ammonium (NH4+) or nitrate (NO3-) forms, which influence plant growth and absorption of nutrients in higher plants. The aim of the study was to determine the influence o...

Open access Research Article 10.9734/JAERI/2017/30907

Characterization and Documentation of Factors Contributing to Production and Consumption of African Leafy Vegetables (ALVs) in Kiambu and Kirinyaga Counties in Kenya

Munene Rozy, Changamu Evans, Korir Nicholas & P. Gweyi-Onyango Joseph · Asian Research Journal of Agriculture · 2016

The aim of the study was to evaluate popular ALVs in two counties; i.e. Kiambu and Kirinyaga counties in Kenya.  Focus group discussion (FGD) and a field survey were employed. The study was carried out in the two counties in Central Kenya between January and February; 2015.  Purp...

Open access Research Article 10.9734/ARJA/2016/28734