The objective of this research was to examine the effect and quantity of rice straw mulch on the growth and production of kailan. This research was conducted inAspakusa Makmur Farms Association, Teras, Boyolali and Laboratory of Ecology and Plant Production, Faculty of Animal and Agricultural Sciences, Diponegoro University, Semarangfrom January 24th to March24th 2018. The research was assigned in completely randomized monofactor design with the factor was M0: control, M1: 2 ton/ha, M2: 4 ton/ha, M3: 6 ton/ha and M4: 8 ton/ha. Parameters observed were plant height, number of leaves, soil and temperature, plant and root wet weight, plant and root dry weight and total chlorophyll content.The results showed thatmulch treatment with a dose of 6 tons/ha was able to increase the yield of leaves, root dry weight and total chlorophyll content but did not increase crop yields, soil and temperature, plant and root wet weight, plant dry weight Keyword: Kailan, Mulch, Rice straw ABSTRAK  Penelitian bertujuan untuk mengkaji pengaruh dan takaran mulsa jerami padi terhadap pertumbuhan dan produksi tanaman kailan. Penelitian dilakukan pada tanggal24 Januari 2018 – 24 Maret 2018 di Lahan pertanian Asosiasi Aspakusa Makmur Kecamatan Teras Kabupaten Boyolali dan Laboratorium Ekologi dan Produksi Tanaman, Fakultas Peternakan dan Pertanian, Universitas Diponegoro, Semarang. Penelitian disusun dengan rancangan acak lengkap monofaktor dengan perlakuan M0: kontrol, M1: jerami padi 2 ton/ha, M2: jerami padi 4 ton/ha, M3: jerami padi 6 ton/ha dan M4: jerami padi 8 ton/ha. Parameter yang diamati adalah tinggi tanaman, jumlah daun, kelembaban dan suhu tanah, berat basah tanaman dan akar, berat kering tanaman dan akar dan kandungan klorofil total. Hasil penelitian menunjukkan bahwa Perlakuan mulsa dengan takaran 6 ton/ha mampu meningkatkan hasil jumlah daun, berat kering akar dan kandungan klorofil total tetapi tidak meningkatkan hasil tinggi tanaman, kelembaban dan suhu tanah, berat basah tanaman dan akar, berat kering tanaman Kata kunci: kailan, mulsa, jerami padi

The aim of this research was to observe of subtitution of inorganic fertilizer with organic herbs fertilizer on growth and production of tomato plants. The research used Monofactor Completely Randomized Design with 3 replications. The treatment that substitution of inorganic fertilizer with organic herbal fertilizer were 100%+0% (T0); 80%+20% (T1); 60%+40% (T2); (T3) 40%+60% (T3);20%+80% (T4); 0%+100% (T5). Parameters observed were plant height, number of leaves, number of flowers, number of fruit and weight of fresh fruit. Data were analysis of variabel (F Test) and further test with Tukey Multiple Range Test (BNT). The results showed that the substitution of fertilizer on treatment T3 (40% of inorganic fertilizers + 60% organic herbal fertilizer) can give number of leaves, number of flowers, number of fruit and weight of fresh fruit higher than compared with the other treatment. However, no significant effect on plant height. Keywords: Tomato varieties of permata, organic herbal fertilizer, dosage ABSTRAK  Penelitian bertujuan untuk mengetahui pengaruh substitusi pupuk anorganik dengan pupuk herbal organik terhadap pertumbuhan dan produksi tanaman tomat. Penelitian menggunakan percobaan Monofaktor Rancangan Acak Lengkap dengan 3 ulangan. Perlakuan yang diberikanadalah substitusi pupuk anorganik dengan pupuk herbal organik yaitu 100%+0% (T0); 80%+20% (T1); 60%+40% (T2); (T3) 40%+60% (T3);20%+80% (T4); 0%+100% (T5). Parameter yang diamati yaitu tinggi tanaman, jumlah daun, jumlah bunga, jumlah buah dan berat buah segar. Data diolah dengan analisis ragam (Uji F) dan uji lanjut denganBeda Nyata Terkecil (BNT).Hasil penelitian menunjukkan bahwa substitusi pupuk pada perlakuan T3(40% pupuk anorganik + 60% pupuk herbal organik) dapat menghasilkan jumlah daun, jumlah bunga, jumlah buah dan berat segar buah tomat lebih tinggi dibandingkan dengan perlakuan lainnya. Namun tidak berpengaruh nyata terhadap tinggi tanaman. Kata kunci: tomat varietas permata, pupuk herbal organik, dosis

<p>Sandy soil is very difficult to remain the water and nutrients so that leaching often occurs before nutrients absorbed by the roots. It can be happen because sandy soil has many macro pores in the soil. This research was aimed to study the effect of biochar and cow manure fertilizer for growth and products of <em>Brassica rapa</em> L. plants on sandy soil. The method used was factorial completely randomized design with 2 factors. This first factor was type of biochar (paddy husk biochar and corn cobs biochar) and the second factor was dosage of cow manure fertilizer (5 tons/ha, 10 tons/ha, 15 tons/ha, 20 tons/ha, 25 tons/ha). The result showed that the application of cow manure fertilizer had significant effected on bulk density and soil porosity. The interaction between the type of biochar and dosage of cow manure fertilizer had significant effect on ground water content. The application of biochar and high doses of cow manure fertilizer resulted in increased ground water content on sandy soil.  The type of biochar and dosage of cow manure fertilizer had no significant effect on the nitrogen uptake, plant height, number of leaves, and crown fresh weight.</p>

This research aimed to observe the response of different incubation period and dosage of liquid organic fertilizer (LOF) based on vegetable and fruit local microorganism on cherry tomato growth and production. This research was conducted at Operational Greenhouse, Balai Benih Pertanian Kota Semarang Gunung Pati, Semarang. The research was conducted by 3x3 factorial experiments with 3 replications. The first factor was 6, 12, 18 days of incubation period and the second factor was 120, 240, 360 ml/plant dosage of LOF. The observed parameters were fruit N uptake, plant height, fruit diameter and fruit fresh weight. Results of study showed that both treatments had no significant effect on fruit diameter and fruit fresh weight caused by lack of P in LOF so that the overall fruit production was not optimum. Interaction between both treatments showed significant effect on fruit N uptake when on short incubation period, the dosage used was higher and vice versa. Six days of incubation with 240 ml/plant dosage gave the highest efficiency on improving fruit N uptake. Incubation period has no significant effect but the dosage of 360 ml/plant significantly gave optimum effect on plant height in comparison with dosage of 120 and 240 ml/plant. This research can be concluded that LOF with 6 days of incubation with dosage used between 240-360 ml/plant was efficient to improve growth of cherry tomato plant and addition of fertilizer was needed to improve production of cherry tomato. Keywords : Cherry tomato, LOF incubation period, LOF dosage

This study examines various problems occurring in wetland clearing and uses in South Kalimantan. In the beginning, the wetland clearing aimed to expand the food crop area in order to implement government policies to meet the food needs. However, it has changed into the capitalist media and transmigration purposes. This study uses a historical perspective composing from heuristic to historiography with an ecological approach. Based on the findings, the land clearing was integrated with the transmigration program which had been started since the 1960s. The argument that can be developed in this study is that wetland-use expansion causes two basic problems in environmental management, namely the large volume of standing water and the relatively high acidity level. This expansion referred to the settlement developed around the wetlands which increasingly could not be controlled by the government. However, ideally, the existing situation had to show that wetland clearing has shifted should balance social, environmental, and economic values, of which the implementation to regulate self-productivity that actually has been running for generations.