This article aims to examine the effect of phosphate solubilizing bacteria (PSB) on the growth and yield of G3 seeds of potato (solanum tuberosum L.) varieties of medians. The experiment was conducted in the experimental garden of The Faculty of Agriculture of Winaya Mukti University Tanjungsari, Sumedang with a height of 850 meters above sea level with the order of land Andisol. Time trials are conducted from May to August 2019. The design used is a simple RandomIzed Group Design consisting of five types of phosphate Solubilizing bacteria, namely without PSB, Pseudacidovorax intermedius, Agrobacterium fabrum, Agrobacterium tumefaciens, Serratia nematodiphila and repeated five times each. The results of the experiment showed that the administration of this type of PSB was able to increase the height of the plant and the number of leaves at the age of 28 DAP and 42 DAP and give the result of the number of potatoes and the weight of the perpetak tubers on the potato crop of the medians varieties better.

Experimental research aims to study the interaction between the dose of chicken manure fertilizer and the concentration of biological fertilizer in increasing the yield of zucchini. The research was conducted for three months from March to May 2021 in Sanca Village, Ciater District, Subang Regency. Using a factorial randomized block design method consisting of two factors, the first factor is the dose of chicken manure fertilizer consisting of 4 levels, namely: 0 tons ha-1 (k0), 10 tons ha-1 (k1), 20 tons ha-1 (k2 ) and 30 tonnes ha-1 (k3). The second factor is the concentration of biological fertilizers consisting of 4 levels, namely: 0 ml L-1 (h0), 5 ml L-1 (h1), 10 ml L-1 (h2) and 15 ml L-1 (h3) repeated as many as 2 times. The results showed that the dose of chicken manure fertilizer and the concentration of biological fertilizer did not show any interaction. By independent effect, all levels of treatment with biological fertilizer concentrations did not show significant differences in fruit length, fruit diameter, weight per fruit, fruit weight per plant and fruit weight per plot at harvesting time of 34 DAP, 36 DAP and 38 DAP.

Artikel ini bertujuan untuk mempelajari pengaruh kombinasi pupuk kandang kotoran puyuh dan NPK (16-16-16) terhadap pertumbuhan dan hasil tanaman selada, serta mempelajari dosis yang terbaik yang memberikan pertumbuhan dan hasil terbaik tanaman selada. Percobaan dilaksanakan di Balai Penelitian Tanaman Sayuran (BALITSA) Cikole, Lembang, Kabupaten Bandung Barat dengan ketinggian tempat 1250 meter diatas permukaan laut dengan ordo tanah Andisol. Waktu percobaan dilakukan pada bulan April sampai dengan Juni 2020. Rancangan lingkungan yang digunakan adalah Rancangan Acak Kelompok (RAK) sederhana yang terdiri dari sepuluh perlakuan yaitu Tanpa pupuk, 7.5 ton ha-1 Pupuk kandang kotoran (PKK) puyuh, 15 ton ha-1 PKK puyuh, 22.5 ton ha-1 PKK puyuh, 30 ton  ha-1 PKK puyuh, 400 kg ha-1 NPK (16-1616), 7.5 ton ha-1 PKK puyuh + 200 kg ha-1 NPK, 15 ton ha-1 PKK puyuh + 200 kg ha-1 NPK, 22.5 ton ha-1 PKK puyuh + 200 kg ha-1 NPK, 30 ton ha-1 PKK puyuh + 200 kg ha-1 NPK dan masing masing diulang tiga kali. Hasil percobaan menunjukkan bahwa kombinasi pupuk kandang kotoran puyuh dan NPK berpengaruh nyata terhadap seluruh variabel kecuali terhadap variabel nisbah pupus akar. Pada variabel bobot bersih per plot perlakuan C, D, G, H dan I menunjukkan hasil berbeda nyata lebih tinggi. Hasil tertinggi ditunjukkan pada perlakuan D (22.5 ton ha-1 Pupuk kandang kotoran puyuh)  dengan bobot 4262.83 gram/m2 atau setara dengan 42,6 ton ha-1.