T. Prabhu, P. R. Narwadekar, A. K. Sannindranath and M. Rofi, “Effect of Integrated Nutrient Management on Growth and Yield of Okra (Abelmoschus esculentus (L.) Moench) cv. Parbhani Kranti,” The Orissa Journal of Horticulture, Vol. 31, No. 1, 2003, pp. 17-21.
 G. Neeraja, B. Gautham and I. P. Reddy, “Comparative Yield Trial in Okra (Abelmoschus esculentus L) Hybrids under Southern Telangana Zone of Andhra Pradesh,” The Orissa Journal of Horticulture, Vol. 30, No. 2, 2002, pp. 20-22.
 C. A. Fatokun and H. R. Chheda, “The Effects of Nitrogen and Phosphorus on Yield and Chemical Composition of Okra (Abelmoschus esculentus L. Moench) ISHS,” Acta Horticulturae, Vi African Symposium on Horticultural Crops, 1980.
 U. C. Pandey, S. Lal, M. L. Pandita and G. Singh, “Effect of Nitrogen and Phosphorus Levels of Seed Production of Okra (Abelmoschus esculentus (L.) Moench),” Haryana Journal of Horticultural Sciences, Vol. 9, 1980, pp. 165-169.
 B. K. Senapati, M. C. Dash, A. K. Rana and B. K. Panda, “Observation on the Effect of Earthworm in the Decomposition Process in Soil under Laboratory Conditions,” Comparative Physiology and Ecology, Vol. 5, 1980, pp. 140-142.
 B. K. Birbal and Y. S. Nehara Malik, “Effect of Spacing and Nitrogen on Fruit Yield of Okra (Abelmoschus esculentus L. Moench),” Haryana Agricultural University Journal of Research, Vol. 25, 1995, pp. 47-51.
 R. P. Singh, C. B. S. Rajput and S. N. S. Chaurasia, “Effect of Different Levels and Methods of Potassium Application on Growth and Green Pod Yield of Okra (Abelmoschus esculentus (L) Moench) cv. Parbhani Kranti,” Haryana Journal of Horticultural Sciences, Vol. 27, No. 4, 1998, pp. 288-292.
 S. C. Poi, “Effect of Azospirillum lipoferum and Pseudomonas striata as Inoculants on Some Vegetable Crops for Nitrogen and Phosphate Nutrition Soils of West Bengal,” Ecology and Environment, Vol. 16, No. 2, 1998, pp. 388-389.
 M. B. Patil, S. D. Jogdand and A. S. Jadhar, “Effect of Organic and Bio-Fertilizers on Yield and Quality of Okra,” Journal of Maharashtra Agricultural Universities, Vol. 25, No. 2, 2000, pp. 213-214.
 N. Shanthi and B. Vijayakumari, “Effect of NPK with Different Organic Manures on Biometric Parameters of Bhendi (Abelmoschus esculentus L. var. Arka Anamika),” Journal of Phytological Research, Vol. 15, No. 2, 2002, pp. 209-212.
 A. Chattopadhyay and B. C. Sahana, “Response of Okra Seed Crop to Nitrogen and Phosphorus Fertilization in Acidic Soil of Old Alluvial Zone, West Bengal,” Research on Crops, Vol. 1, No. 2, 2001, pp. 176-180.
 K. A. A. El-Shaikh, “Effect of Phosphorus and Potassium Fertilization on Green Yield, Seed Production and Quality of Two Okra Cultivars in Reclaimed Soils,” Assiut Journal of Agricultural Science, Vol. 36, No. 1, 2005, pp. 51-68.
 S. O. Omotoso and O. S. Shittu, “Effect of NPK Fertilizer Rates and Method of Application on Growth and Yield of Okra (Abelmoschus esculentus L. Moench.),” Research Journal of Agronomy, Vol. 1, No. 2, 2007, pp. 84-87.
 G. Charron, V. Furlan., M. Bernier-Cardou and G. Doyon, “Response of Onion Plants to Arbuscular Mycorrhizae. I-Effect of Inoculation Method and Phosphorus Fertilization on Biomass and Bulb Firmness,” Mycorrhizae, Vol. 11, No. 4, 2001, pp. 187-197.
 M. P. Patil, N. C. Hulamani, S. I. Athani and M. P. Patil, “Response of New Tomato Genotype Megha to Integrated Nutrient Management,” Advances in Agricultural Research in India, Vol. 9, 1998, pp. 39-42.