A field experiment was conducted at the University of Calabar Teaching and Research Farm to
evaluate the effects of neem-based organic fertilizer, NPK and their combinations on soil chemical
properties and growth of okra (Abelmoschus esculentus) on a degraded Ultisol Calabar. The
experiment was laid out in a randomized complete block design with three replications comprising of
six treatments. The treatments were control (no amendment), sole NPK 20:10:10 fertilizer and
neem–based organic fertilizer applied at 120 kg N/ha, combinations of 60 kg N/ha NPK+ 60 kg N/ha
Neem, 90 kg N/ha NPK + 30 kg N/ha Neem and 30 kg N/ha NPK + 90 kg N/ha Neem. Results
showed that the soil chemical properties were influenced significantly (P
John, K. & Iren1, O (2019). Effects of Neem-Based Organic Fertilizer, NPK and Their Combinations on Soil Properties and Growth of Okra (Abelmoschus esculentus) in a Degraded Ultisol of Calabar, Nigeria. Afribary. Retrieved from https://afribary.com/works/effects-of-neem-based-organic-fertilizer-npk-and-their-combinations-on-soil-properties-and-growth-of-okra-abelmoschus-esculentus-in-a-degraded-ultisol-of-calabar-nigeria
John, Kingsley, and Otobong Iren1 "Effects of Neem-Based Organic Fertilizer, NPK and Their Combinations on Soil Properties and Growth of Okra (Abelmoschus esculentus) in a Degraded Ultisol of Calabar, Nigeria" Afribary. Afribary, 28 Feb. 2019, https://afribary.com/works/effects-of-neem-based-organic-fertilizer-npk-and-their-combinations-on-soil-properties-and-growth-of-okra-abelmoschus-esculentus-in-a-degraded-ultisol-of-calabar-nigeria. Accessed 23 Apr. 2024.
John, Kingsley, and Otobong Iren1 . "Effects of Neem-Based Organic Fertilizer, NPK and Their Combinations on Soil Properties and Growth of Okra (Abelmoschus esculentus) in a Degraded Ultisol of Calabar, Nigeria". Afribary, Afribary, 28 Feb. 2019. Web. 23 Apr. 2024. < https://afribary.com/works/effects-of-neem-based-organic-fertilizer-npk-and-their-combinations-on-soil-properties-and-growth-of-okra-abelmoschus-esculentus-in-a-degraded-ultisol-of-calabar-nigeria >.
John, Kingsley and Iren1, Otobong . "Effects of Neem-Based Organic Fertilizer, NPK and Their Combinations on Soil Properties and Growth of Okra (Abelmoschus esculentus) in a Degraded Ultisol of Calabar, Nigeria" Afribary (2019). Accessed April 23, 2024. https://afribary.com/works/effects-of-neem-based-organic-fertilizer-npk-and-their-combinations-on-soil-properties-and-growth-of-okra-abelmoschus-esculentus-in-a-degraded-ultisol-of-calabar-nigeria