The availability of NPK compound fertilizer is expected to help farmers to optimally supply the nutrient needs of corn plants. The aim of the study was to determine the efficient dose of NPK 15-15-6-4 fertilizer and its combination with urea on the growth and yield of corn. The study was conducted in Simbang Village, Simbang District, Maros Regency, South Sulawesi in January - April 2019. The study used a Randomized Complete Block Design (RCBD) with a combination of 7 treatments with four replications, consisting of: (P1) 400 kg NPK 15-15-6-4; (P2) 400 kg NPK 15-15-6-4 + 100 kg urea; (P3) 400 kg NPK 15-15-6-4 + 150 kg urea; (P4) 450 kg NPK 15-15-6-4; (P5) 350 kg NPK 15-15-6-4; (P6) 350 kg NPK 15- 15-6-4+ 150 kg urea; (P7) 150 kg NPK Phonska + 250 kg urea. The results showed that NPK 15-15-6-4 compound fertilizer had a good effect on the growth and yield of corn plants. NPK 15-15-6-4 compound fertilizer at a dose of 450 kg/ha and a dose of 400 kg NPK 15-15-6-4 + 100 kg urea gave the best effect with total yield up to 5.5-5.9 ton/ha.
Organic fertilizers can be an alternative source of plant nutrients. The aim of experiment is to determine the effect of liquid organic and inorganic fertilizer application on hybrid mayze growth and yield. The experiment was conducted at Soppeng regency, South Sulawesi from September to December 2019. The experiment was set in Randomized Block Design with eight level of treatments and three replications. Treatments were (P1) control, (P2) inorganic fertilizer 100% recommendation, (P3) inorganic fertilizer 75% recommendation; (P4) liquid organic fertilizer 5 ml 2 L−1 water + P3; (P5) liquid organic fertilizer 10 ml 2 L−1 water + P3; (P6) liquid organic fertilizer 15 ml 2 L−1 water + P3; (P7) liquid organic fertilizer 20 ml 2 L−1 water + P3; and (P8) liquid organic fertilizer 10 ml 2 L−1 water + P2. Combinations of liquid organic plus inorganic fertilizer produce better growth and higher production than only inorganic fertilization and control. The combination of liquid organic and inorganic fertilizer 75% recommendation (15 ml 2 L−1 water + NPK Phonska 300 kg ha−1 + Urea 150 kg ha−1 show better agronomic performance and yield components with grain yiled 8.2 t ha−1 higher than other treatments. This dosage could be used for optimum maize production.
The objective of this study is to find out and explain the destructive fishing practices occurred in Taka Bonerate National Park area and the factors that caused it. Data retrieval was conducted with in-depth interview techniques, literature studies and documents. The results showed that destructive fishing practices were still prevalent in the Taka Bonerate National Park area, both using chemicals (cyanide) and those using explosives (bombs) in fishing activities. The conclusions from this study are that fisheries destructive activities are generally not carried out individually but in groups, namely 3-4 people led by a captain. There are several contributing factors to the proliferation of destructive fishing practices in the small islands of Taka Bonerate National Park. Where they are still under guarded, and the conflicts of authority among the Taka Bonerate National Park management authorities, conflicts between fishermen, and availability of bombs and cyanides raw materials. The other are strong position of retainer and weak position of mustard in patron client relations between punggawa-sawi. The last factor but not least, that there are markets for them to sell the bombs and cyanide fishing.
Fertilizer is considered to be one of the important factors in increasing shallot production. However, this must be followed by proper fertilization management to meet the nutrient requirements of the plant. This research was conducted with the aim of dertermining the correct dosage of NPK 16:16:16 based on ammonium nitrate in shallot plants. The assessment was carried out in October-December 2018. The research was carried out at one of the centers of shallot development, specificallly in Batu Rampung Hamlet, Tanete Village, Angeraja Sub-District, Enrekang Regency, South Sulawesi. A randomized block design (RBD) was used in this research, accompanied by three replications and eight treatments: P1 = NPK Nitrate 16-16-16 450 kg/ha + Urea 150 kg/ha + ZA 300 kg/ha; P2 = NPK Nitrate 16-16-16 400 kg/ha + Urea 150 kg/ha + ZA 300 kg/ha; P3 = NPK Nitrate 16-16-16 350 kg/ha + Urea 150 kg/ha + ZA 300 kg/ha; P4 = NPK Nitrate 16-16-16 900 kg/ha; P5 = NPK Nitrate 16-16-16 800 kg/ha; P6 = NPK Nitrate 16-16-16 700 kg/ha; P7 = Urea 200 kg/ha + ZA 400 kg/ha + KCL 100 kg/ha; P8 = NPK Phonska 645 kg/ha + Urea 645 kg/ha + SP36 645 kg/ha. The results showed that NPK Nitrate Fertilization 16:16:16 at a dose of 700- 900 kg/ha indicated a fairly high growth and production (14.5-16.3 t/ha). The results obtained were not significantly different from the high-dose fertilization used by farmers (17.2 t/ha), and higher than the single dose based on the recommendation (12.8 t/ha).
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