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A. Syamad Ramayana

Publications (4)

Rainfall Variability and Lowland Rice (Oryza sativa L.) Productivity in Tenggarong Seberang District

A. Syamad Ramayana, Rapika Dewi, Suria Darma Idris, Eliyani & Helda Syahfari · Journal of Agriculture and Ecology Research International · 2026

Rice (Oryza sativa L.) is a primary food crop in Indonesia, playing a crucial role in meeting the population's food needs. Its productivity is heavily influenced by climatic conditions, particularly rainfall, which serves as the main water source for rain-fed paddy fields. Rainfa...

Open access Research Article 10.9734/jaeri/2026/v27i4778

Effect of Liquid Organic Fertilizer Paitan Leaf Extract (Tithonia diversivolia) on the Growth and Yields of Soybean Plant (Glycine max (L.) Merrill) on Rainfed Land

A. Syamad Ramayana, Sulaminingsih, Suwarno, C. N. Panjaitan, L. O. Ilyas & Suryanti · International Journal of Plant & Soil Science · 2023

Soybeans (Glycine max (L.) Merrill) are the third main food commodity after rice and corn. Until now, soybean productivity at the farmer level is still low, with an average of 1.3 Mg ha-1 with a range of 0.6-2.0 Mg ha-1, while the potential yield can reach 3.0 Mg ha-1. This very...

Open access Research Article 10.9734/ijpss/2023/v35i234215

The Effects of Mutiara Grower NPK Fertilizer and Floraone Biofertilizer on the Growth and Yield of Cauliflower (Brassica oleracea var. botrytis L.) PM 3000 F1 Variety

Helda Syahfari, Oktavia Aulia Fransiska, Marisi Napitupulu, Abdul Fatah & A. Syamad Ramayana · Asian Journal of Agricultural and Horticultural Research · 2026

The objectives of the experiment were (1) to determine the effect of NPK Mutiara Grower fertilizer and Floraone biofertilizer as well as their interaction on growth and yield of cauliflower PM 3000 F1 variety; and (2) to identify the appropriate dose of Mutiara Grower NPK fertili...

Open access Research Article 10.9734/ajahr/2026/v13i3491

The Effect of Chicken Manure and NPK Grower Fertilizer on the Growth and Yield of Purple Eggplant (Solanum melongena L.) Laguna F1 Variety

Marisi Napitupulu, Abdul Fatah, Reza Handayani, Noor Jannah, Helda Syahfari & A. Syamad Ramayana · Asian Journal of Soil Science and Plant Nutrition · 2025

The purpose of this experiment was to determine the effect of Chicken Manure and NPK Grower fertilizer and their interaction on the growth and yield of the Laguna F1 purple eggplant variety, and to obtain the appropriate dosage of Chicken Manure and NPK Grower fertilizer for the...

Open access Research Article 10.9734/ajsspn/2025/v11i4629