Nutrients or nutrients are important factors for plant growth which can be likened to food substances for plants. One of the factors that support plants to grow and produce optimally is the availability of nutrients in sufficient quantities in the soil. The elements N, P and K, have a very important role in plant growth and production. The purpose of the preparation of the paper is to provide information about efforts to improve efficiency and availability of nitrogen in the soil and nitrogen uptake in lowland rice plants (Oryza sativa L.) Nitrogen has a role as a constituent of enzymes which plays a large role in plant metabolism but is relatively not available to plants. The efficiency of the use of Nitrogen (N) fertilizer in lowland rice can be maximized by way of 1) timely fertilization, 2) planting superior varieties that are responsive to the administration of Nitrogen (N), 3) improving cultivation techniques, 4) regulating the timing of Nitrogen fertilizer (N ) the right during the growing season with Leaf Color Chart (LCC) or Leaf Color Chart (BWD) and 5) NPK fertilization simultaneously. Efforts to increase the availability of nitrogen in the soil and uptake in wetland rice can be done by adding high-quality organic matter, the use of Azotobacter isolates as biological fertilizers to reduce the decrease in soil health due to the input of synthetic chemicals.

Horticulture plant is essential component of agricultural development. It brings benefits products horticulture meet their food needs , aesthetic and to maintain health and environment. Climate change and the limited resources land causing loss for farmers food crops and horticulture. The purpose of drafting this paper is to inform the utilization of technology greenhouse and hydroponics as solutions to deal with climate change in the cultivation of plants horticulture. To get the result harvest season which is satisfying in the cultivation of plants horticulture , need to pay attention to environmental factor growing plants. The utilization of greenhouse in the cultivation of plants is one of a manner to give the environment that were more accessible for the condition of optimum position for the growth of plants. The use of hydroponics in cultivation crop can be implemented in greenhouse to keep the growth of plants optimally and protected from outside influences

Yogyakarta - Indonesia has a variety of types of sorghum. Antioxidants and protein are among its nutritional advantages. Processing technology innovation is still needed to optimize its nutrition. Polishing is the main process in sorghum. This study aims to determine the effect of polishing and types of sorghum (brown and white) on the nutritional content of sorghum crackers. Nutrient content analyzed included water, ash, protein, fat, crude fiber, carbohydrate, energy, and beta carotene content. We found that the polishing process of the two types of sorghum resulted in different nutritional advantages of the sorghum crackers. The water, protein, fat, and crude fiber content of sorghum crackers decreased from the initial nutrient content of sorghum grain. Conversely, the content of ash, carbohydrates, and energy increase after becoming crackers. Polishing of white and brown sorghum grain causes higher content of ash, protein, energy, and beta carotene in sorghum crackers compared to unpolished ones. The crackers made from polished white sorghum grain had a higher protein content (7.74%) than those from polished brown sorghum grain (5.71%). The crackers made from polished brown sorghum grain had nutritional advantages in the content of ash (2.78%), energy (333.92 calori/100g) and beta carotene (2134.16mg/100g) compared to crackers made from polished white sorghum grain (2.66%; 317.23 calori/100g; 53.01mg/100g). Polishing of white sorghum grain produces high protein crackers, while polishing of brown sorghum grain produces crackers with high functional beta carotene content.

ABSTRAK Tebu (Saccarum officinarum L.) ialah suatu jenis tanaman yang hanya dapat ditanam di daerah beriklim tropis dan memiliki nilai ekonomi tinggi. Permasalahan utama industri gula di Indonesia ialah rendahnya harga gula karena sering terjadi impor gula, rendahnya produktivitas akibat teknis agronomi tidak dilakukan dengan sempurna. Pengembangan tebu lahan kering merupakan pilihan menjanjikan untuk mempercepat proses pencapaian kuantitas, kualitas, dan kontinuitas produksi gula menuju kemandirian gula nasional. Tujuan penyusunan makalah ini adalah untuk memberikan informasi tentang peningkatan produktivitas tebu pada lahan kering melalui pemanfaatan bahan organik dan bahan pelembab tanah sintesis (poliakrilamides). Peranan bahan organik sangat besar dalam meningkatkan kesuburan fisik, biologi dan kimia tanah dan menentukan produktivitas tanah. Bahan organik mempunyai beberapa keunggulan yaitu bahan mudah didapat, harganya murah, namun ketersediaannya selalu berubah dan harus diberikan berkali-kali serta dalam jumlah yang besar. Selain bahan organik, dalam pertanian telah direkomendasikan poliakrilamide sebagai pelembab tanah yang dapat meningkatkan sifat fisikokimia tanah, mengurangi jumlah irigasi, kehilangan unsur hara dan biaya produksi tanaman. Penggunaan poliakrilamide adalah salah satu teknologi yang paling efektif dan ekonomis terbaru yang diidentifikasi dapat menyelesaikan peningkatan kualitas air yang dibutuhkan.Kata Kunci : produktivitas, tebu, bahan organik, pelembab tanah sintesis ABSTRACT Sugar cane (Saccarum officinarum L.) is a crop that can only be planted in the tropics and having high economic value. The main problems sugar industry in Indonesia is low sugar price because of frequent imports sugar, due to technical the low agronomy not done with perfect. The development of sugar cane dry land an option pledged to speed up the process of the quantity, quality, and continuity sugar confection to independence national sugar. The purpose of drafting this paper is to provide information about increased productivity sugar cane in dry land through the application of organic matter and moisturizing synthesis of land (poliakrilamides). The role of organic matter very large in boost fertility physical, biology and chemistry the ground and determine productivity land. Organic material has had several excellence namely materials readily obtainable, cheap. But supply always changing and it should be given many times and in large quantities. Besides organic matter, in agriculture has recommended poliakrilamide as a humectant land can improve the nature of fisikokimia land, reduce the number of irrigation, lost the confusion and production costs plant. The use of poliakrilamide is one of the most effective technology and economical latest identified to finish improve the quality of water required

Kakao (Theobroma cacao L.) di Indonesia suatu komoditas andalan pertanian, berperan sangat penting dalam perekonomian.  produksi kakao di Indonesia tahun 2016 sebesar 656.817 ton. Produksi kakao nasional sebagian besar berasal dari Sulawesi (63,8%) yang dihasilkan oleh mayoritas petani rakyat (smallholder). Tujuan penyusunan makalah yaitu untuk memberikan informasi tentang teknologi pemanfaatan limbah kulit buah kakao sebagai pupuk organik ramah lingkungan bagi tanaman sebagai alternatif dalam mengantisipasi tingginya harga  maupun kelangkaan pupuk sintetis serta menjamin ketersediaan pupuk saat musim tanam, sehingga diharapkan dapat meningkatkan produktivitas dan pendapatan petani kakao. Inovasi pemanfaatan limbah kulit buah kakao pada pertanaman kakao berpotensi untuk diolah menjadi pupuk organik dalam bentuk kompos, berperan dalam memperbaiki sifat fisik tanah dan biologi tanah serta membantu penyerapan unsur hara penting bagi tanaman, sehingga dapat mendukung produktivitas kakao dan peningkatan pendapatn petani di masa datang