Sendangmulyo Village is one of the villages in Bulu District, Rembang Regency, which is located on the border of Blora Regency. One of the agricultural commodities that are widely cultivated in Sendangmulyo Village is corn. However, the use of this corn commodity is generally still limited to the seeds, while the cob is discarded and instead pollutes the environment. Seeing this problem, the IPB Rembang KKN-T group held a webinar as well as the practice of making silage made from corn cobs. The purpose of this program is to provide an understanding to the people of Sendangmulyo Village regarding the utilization of corncob waste into silage. The webinar was held online through the zoom meeting platform for the general public, then continued with the practice of making silage together for the people of Sendangmulyo Village. The materials used in making silage are corn cobs and elephant grass that have been chopped, bran, molasses, and water. Quality silage can be seen from physical characteristics such as color, texture, aroma, and the presence of mushrooms. Based on the results of observations, the silage made has a light brown color, is not runny and has a slightly sour smell but there is still a little fungus so that the silage results can be classified as poor. The implementation of the webinar and the direct practice of making silage from corn cobs received a positive response from the webinar participants and the people of Sendangmulyo Village. The disadvantage of this program is that in the practice of making silage the number of participants is limited due to the PPKM period so that the delivery of information has not been widely conveyed.
Multi-criteria analysis is the process of decision making, based on the exploration of many analysis. The use of multi-criteria analysis allows for fair decisions to be made. In this research, the multi-criteria analysis combines quantitative and qualitative data that can be used to determine primary commodities in a region. Besides, the commodities analyzed are only food crops and horticulture. The research aims to analyze primary commodities of village, land suitability and make a recommendation of primary commodities development in the Jasinga District. The methods used multi-criteria analysis with five parameters. They are Location Quotient (LQ) and Differential Shift (DS), land suitability, land rent, commodity economic analysis, and analytical hierarchy process. Furthermore, the results of the analysis are obtained through weighted index scoring methods, and then analyzed availability land and recommendation of primary commodities development. There are five primary commodities in every village at the Jasinga District likes chili, corn, rice, cucumber, and sweet potato. Existing land for primary commodities development is 10 634.3 ha. The direction of primary commodities development included existing, and new areas are 6 036.4 ha, especially for paddy field is 62.5 ha in Kalongsawah village.
Teak (Tectona grandis Linn f.) produce one of the most desirable wood in the world. Nowadays, fast growing teak resulting from genetically engineered teak have been available. This study aims to look at the relationship between land characteristics and soil classification with vegetative growth of "Unggul Nusantara" varieties of teak. The study was conducted in Ciampea, Bogor Regency. Soil properties were analyzed from three profiles, while the vegetative growth of teak was measured from 2.5-3 years old teak planted on those land. The diversity of soil properties on the profiles were function of the difference of soil parent material as well as its position on the slopes. Three soil profiles of P-1, P-2, and P-3, lying from upslope to the downslope, were classified respectively as Typic Paleudalf, very fine, mix, active, isohipertermic; Typic Dystrudept, very fine, mix, active, isohipertermic; and Typic Hapludult, very fine, mix, semi-active, isohipertermic. Soil of the three profiles were capable of supporting the growth of teak varieties of "Unggul Nusantara". The best grown plant was found on the profile P-1 in the upslope, followed by the plant on the profile P-3 in the downslope, and then the plants on land above the P-2 in the middle slope. Nevertheless, the quality of the teak harvest produced in the three profiles can be categorized as low category. Soil with lime sediment parent material that has a high pH and base saturation is able to provide better growth for plants teak varieties of "Unggul Nusantara".
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