Bowa O. Kwach

Nitrogenous Fertilizer Application Rates and Plucking Intervals in East Africa Tea: Effects on Soil Micro-Nutrients (Al, Fe, Cu, Zn)

Robert O. Ombori, P. Okinda Owuor, Bowa O. Kwach, David M. Kamau, Wilson Dufitumukiza & Solomon W. Msomba · Asian Soil Research Journal · 2025

Depletion of nutrients are high in Eastern Africa tea soil due to high rainfall causing surface run-off and leaching, together with removal with crop. Nutrients Replenishment of nutrients by applying fertilizer is therefore necessary. However, nitrogen fertilizers may cause micro...

Open access Research Article 10.9734/asrj/2025/v9i4212

Nitrogenous Fertilizer Application Rates and Plucking Intervals on Tea [Camellia sinensis (L.)] in Eastern Africa: Changes in Soil Calcium, Magnesium and Manganese Levels

Robert O. Ombori, P. Okinda Owuor, Bowa O. Kwach, David M. Kamau, Wilson Dufitumukiza & Solomon W. Msomba · Asian Soil Research Journal · 2025

Tea production requires high rainfall areas that cause nutrients depletion through surface run-off, leaching, and removal with crop. This makes application of fertilisers mandatory to replenish the nutrients. However, such applications could cause soil nutrients imbalance. Harves...

Open access Research Article 10.9734/asrj/2025/v9i4215

Nitrogenous Fertilizer Application Rates and Plucking Intervals on Tea (Camellia sinensis (L.) in Eastern Africa: Effects on Soil Nitrogen, Phosphorous, and Potassium

Robert O. Ombori, P. Okinda Owuor, Bowa O. Kwach, David M. Kamau, Wilson Dufitumukiza & Solomon W. Msomba · Asian Soil Research Journal · 2025

Eastern Africa tea grows in high rainfall areas where nutrients depletion through leaching, surface run-off in addition to removal with crop can be high. Nutrients replenishment through fertilizer applications is therefore necessary. The recommended fertilizer application rates a...

Open access Research Article 10.9734/asrj/2025/v9i4210

Effects of Lung Pruning and Pruning Cycle Period on Selected Mineral Concentrations in Clonal Tea Leaves

P. Okinda Owuor, Gladys Onsando, Simon O. Ochanda, Jennifer A. Odak, Bowa O. Kwach, David K. Kowanga & Humprey O. Agan · Asian Journal of Agricultural and Horticultural Research · 2025

Aims: Pruning in tea management reduces plucking heights to manageable levels, rejuvenates the plant and helps in removing diseased/dead branches. However, it leads to loss of crop and black quality decline in the pruning year. Despite the recorded benefits and challenges, influe...

Open access Research Article 10.9734/ajahr/2025/v12i4420