Agronomy and Crop Sciences Commons^™

Pengaruh Bahan Organik Terhadap Kesuburan Tanah Serta Pertumbuhan Dan Fisiologi Tanaman Kakao Muda Hasil Transplanting Di Tanah Inceptisol, Santi Rosniawaty, Rija Sudirja, Mira Ariyanti, Syariful Mubarok, Agus Wahyudin

Jurnal Kultivasi

Penanaman bibit kakao pada tanah inceptisol memiliki beberapa kendala, salah satunya adalah bahan organik rendah. Peningkatan pertumbuhan tanaman kakao pada awal tanam dapat dilakukan dengan pemberian bahan organik. Saat ini terdapat bahan organik berbentuk cair, namun pengaruhnya terhadap kakao belum menghasilkan belum diketahui, karena pada umumnya bahan organik yang digunakan pada tanaman kakao berbentuk padat. Tujuan penelitian ini untuk melihat pengaruh bahan organik berbeda (asam humat dan pupuk kotoran sapi) terhadap kesuburan tanah, pertumbuhan, dan fisiologi tanaman kakao belum menghasilkan. Percobaan dilakukan pada bulan Januari sampai Desember 2017 di kebun percobaan Fakultas Pertanian, Universitas Padjadjaran, Jatinangor. Rancangan percobaan yang digunakan …

Periode Inkubasi, Tingkat Keparahan, Dan Ketahanan Sepuluh Genotipe Padi Harapan Terhadap Penyakit Hawar Daun Bakteri Strain Iii, Iv, Dan Viii, Nono Carsono, Anggita Dewi, Noladhi Wicaksana, Santika Sari

Jurnal Kultivasi

Genotipe padi harapan dari UNPAD memiliki keunggulan pada daya hasil, tahan terhadap wereng coklat, memiliki amilosa sedang, aromatik dan kualitas bulir yang sangat baik. Pengujian ketahanan genotipe padi harapan yang berasal dari hasil seleksi molekuler dan fenotipik terhadap penyakit hawar daun bakteri (HDB) sangatlah dibutuhkan, karena ketahanan terhadap penyakit ini merupakan salah satu syarat pelepasan varietas padi di Indonesia. Penyakit HDB disebabkan oleh bakteri Xanthomonas oryzae pv. oryzae (Xoo) merupakan penyakit penting yang sering menyerang tanaman padi. Tujuan dari penelitian ini adalah untuk memperoleh informasi potensi genotipe-genotipe padi yang tahan terhadap penyakit HDB yang disebabkan oleh Xoo strain III, IV, …

Spring Regrowth And Steer Performance On Tifton 85 And Coastal Bermudagrass Pastures Following Sod-Seeding With Ryegrass, G. M. Hill, R. N. Gates

IGC Proceedings (1977-2023)

Effects of autumn sod-seeded ryegrass (Lolium multiflorum; cv. Passerel; 37.7 kg/ha) in bermudagrass pastures (Cynodon spp.; cv. Coastal and cv. Tifton 85) on grazing steer performance were determined. Ryegrass was sod-seeded in three of six .81 ha pastures of each bermudagrass. Forage height was adjusted to10 cm during spring. Stocking rates were unaffected by ryegrass in Tifton 85 pastures, but they were higher (P < .05) for Tifton 85 than Coastal. Ryegrass increased tester steer average daily gains by 34% (.86 vs .64 kg/day; P < .01), and gain/ha by 26% (387 vs 306 kg/ha; P < .05). Higher stocking rates resulted in 22% more grazing days (515 vs 421 days/ha; P < .01), and 30% higher gain/ha (391 vs 301 kg/ha; P < .05) for Tifton 85 than Coastal pastures. Ryegrass did not affect stocking rates or steer performance on Tifton 85, but it depressed both on Coastal pastures.

Intensive Grazing Systems For Beef Cattle Production, F. P. Fontenot, V. G. Allen, M. A. Cochran, N. B. Frank

IGC Proceedings (1977-2023)

The objective of this study was to compare grazing systems that used rotational and continuous stocking for beef cows-calves and stocker cattle grazing fescue (Festuca arundinacea) and clover (Trifolium repens). For each system seven cows/calves and seven stocker steers were used within each of two replicates. The cows and stockers grazed stockpiled forage and were fed hay in winter, and grazed growing forage during spring and summer. Cows in the rotational system gained at a faster rate (P< . 05) from October to April than those in the continuous system. Daily gains of calves were higher (P< . 05) for the continuous system. Rate of gain during the last 28 days was higher (P< . 05) for the stockers in the rotational system. Average hay yields were not different for the two stocking systems, but more (P< . 05) hay was fed to the cattle in the continuous system. The system that used continuous stocking was more easily managed and required less labor and facilities.

Hyperseed: An End-To-End Method To Process Hyperspectral Images Of Seeds, Tian Gao, Anil Kumar Nalini Chandran, Puneet Paul, Harkamal Walia, Hongfeng Yu

School of Computing: Faculty Publications

High-throughput, nondestructive, and precise measurement of seeds is critical for the evaluation of seed quality and the improvement of agricultural productions. To this end, we have developed a novel end-to-end platform named HyperSeed to provide hyperspectral information for seeds. As a test case, the hyperspectral images of rice seeds are obtained from a high-performance line-scan image spectrograph covering the spectral range from 600 to 1700 nm. The acquired images are processed via a graphical user interface (GUI)-based open-source software for background removal and seed segmentation. The output is generated in the form of a hyperspectral cube and curve for each …

Intake Estimation Of Rams Under Grazing Condition In A Deferred Pastures Of Panicum Coloratum By Two Techniques, C. M. Ferri, M. A. Brizuela, N. P. Stritzler, H. J. Petruzzi

IGC Proceedings (1977-2023)

The goal of this study was to quantify the organic matter intake (OMI) of Pampinta rams grazing in a Panicum coloratum cv Verde differed pasture. The OMI was compared by two methods: a) the difference between the forage measured in pre and post-grazing condition, and b) the faecal production:digestibility ratio of the diet, estimated by total faecal gathering, and from the quantity of total faecal N in g per 100 g^-1 of OMI and the concentration of total faecal N, respectively. The OMI estimated by difference between the forage measured in pre and post-grazing was 9 % higher (P …

Estimation Of Organic Matter Digestibility And Intake From Faecal Organic Matter And Daily N Excretion And Concentration, C. M. Ferri, N. P. Stritzler, M. A. Brizuela

IGC Proceedings (1977-2023)

This study was performed with grazing sheep, to establish: a) if the amount of total faecal N (C; in g 100g^-1 of organic matter intake (OMI)) remains constant at three feeding levels, in four utilisation periods of deferred Panicum coloratum cv. Verde; b) the relationship between C and faecal N fractions, and c) the relationship between faecal daily excretion of OM and N, and OMI. Intake increased (P< 0.01) with utilisation period, and was related (r = - 0.82; P< 0.01) to the protein content of food, the insoluble N fraction (r = -0.49; P< 0.01) and the soluble:insoluble N ratio (r = 0.41; P< 0.01) in faeces. No relation with total N concentration (r = -0.22; P> 0.05) or soluble N fraction (r = -0.02; P> 0.05) in faeces could be found. Daily excretion of OM and N were positively related (R² = 0.93 and 0.96, respectively; …

Effects Of Fertilization And Legume Introduction On The Forage Production Of Brachiaria Decumbens Pastures, M. R. Correa, Tsutomu Kanno, Manuel C. M. Macedo, J. D. G. Santos Junior, L. G. Beretta

IGC Proceedings (1977-2023)

A grazing experiment was conducted to examine the effects of P and K fertilization and legume introduction on the forage production of Brachiaria decumbens (BD) pastures. Amount of biomass, dry matter production and forage quality were evaluated on BD pastures where three treatments were applied: without maintenance fertilizer (BD-N), with maintenance fertilizer (BD-F), and BD and Stylosanthes guianensis cv. Mineirao (SG) mixture with maintenance fertilizer (BD-FL). The fertilizer application increased an annual average of biomass and the contents of P and K in the leaves. On the other hand, the legume introduction had a positive influence on crude protein and …

Effect Of Five Different Rest Periods On Tiller Regrowth Of Ryegrass, R. W. Coelho, W. R. Ocumpaugh

IGC Proceedings (1977-2023)

Five rest periods were imposed from April to May on a mixed pasture of two ryegrass (Lolium multiflorum Lam.) varieties and white clover (Trifolium repens L.). The rest period starting dates were: April 4, April 18, May 2, May 16, and May 30, for rest periods 1, 2, 3, 4, and 5, respectively. The total area allocated to the experiment was 1.1 ha, which was divided into 22 pastures. The experimental design used was a split-plot. Rest period was assigned to the main plot, grass to the subplot and legume to the subsubplot. The pastures were “mob-grazed” by …

Aboveground Standing Crop Of An Ungrazed Elyonurus Muticus Grassland Under Annual Burning In The Pantanal, Brazil, E. L. Cardoso, S. M. A. Crispim, C. A. G. Rodrigues

IGC Proceedings (1977-2023)

This study was conducted in the Pantanal of Mato Grosso do Sul state, Brazil, from September 1995 to July 1997. The objective was to evaluate the effect of annual burning on grasses and forbs biomass and standing dead in an ungrazed grassland of Elyonurus muticus. In two areas, one free of burning (control) and another area with annual burning, grasses, forbs aboveground biomass, and standing dead were collected. The experimental design was completely randomized with 10 replications. Burning modified the grasses and forbs biomass dynamics when compared to the area free of burning. After the first burning the grasses …

Contract Grazing Of Young Beef Cattle On Ryegrass In The Southeastern Usa, David I. Bransby

IGC Proceedings (1977-2023)

The objective of this study was to evaluate contract grazing (in which the landowner grazes cattle owned by someone else for a specified fee) as an alternative to traditional ownership of the cattle, in order to improve profitability of grazing young beef cattle on annual ryegrass under limited availability of operating capital in the southeastern USA. Production data from a two-year grazing experiment were used as a basis for an economic analysis which assumed market prices for the beef industry in the region. Return/ha over animal and pasture costs was $312.20 for contract grazing, and $477.50 for purchased cattle. However, …

Horses Grazing Management To Promote Distribution Of Lotus Tenuis (Waldst. Et Kit) In A Temperate Grassland, O. E. Ansín

IGC Proceedings (1977-2023)

In a temperate grassland of the Argentine Pampa, the birdsfoot trefoil (Lotus tenuis Waldst. et Kit) distribution was analyzed as a consequence of the grazing method used. In a plot of 40 ha occupied by native grassland an area of 16 ha was implanted with reed canary grass (Phalaris aquatica L.) and L. tenuis. This area was divided into two parts that contained the same pasture and native grassland surfaces, being grazed by horses. One, under continuous grazing and another one, under a controlled grazing. In the continuous grazing the whole year the animals had permanently access …

Climate And Agronomy, Not Genetics, Underpin Recent Maize Yield Gains In Favorable Environments, Gonzalo Rizzo, Juan Pablo Monzon, Fatima Amor Tenorio, Réka Howard, Kenneth G. Cassman, Patricio Grassini

Department of Agronomy and Horticulture: Faculty Publications

Quantitative understanding of factors driving yield increases of major food crops is essential for effective prioritization of research and development. Yet previous estimates had limitations in distinguishing among contributing factors such as changing climate and new agronomic and genetic technologies. Here, we distinguished the separate contribution of these factors to yield advance using an extensive database collected from the largest irrigated maize-production domain in the world located in Nebraska (United States) during the 2005-to-2018 period. We found that 48% of the yield gain was associated with a decadal climate trend, 39% with agronomic improvements, and, by difference, only 13% with …

Irrigation Systems Management, Dean E. Eisenhauer, Derrel L. Martin, Derek M. Heeren, Glenn J. Hoffman

Open Educational Resources: Textbooks

Like most textbooks, this book grew out of our desire to have written material that matches the educational needs of both the students and the instructor of a college course, in this case a course entitled Irrigation Systems Management. The book is the culmination of course notes which have been in development and use for nearly 30 years.

The emphasis of this book is on the management of irrigation systems that are used for agricultural crop production. There are two distinct components of the book, starting with the soil-water-plant-atmosphere system and how soil water should be managed to achieve the …

Productivity Of Intensive Grazing Systems Based Upon Irrigated Pangola Pastures In The French West Indies, G. Alexandre, M. Mahieu, G. Aumont, M. Naves

IGC Proceedings (1977-2023)

This work deals with the comparison of the productivity of intensive grazing systems (IGS) in the French West Indies, used for meat production with cattle, goat and sheep. IGS are based upon the use of irrigated, fertilized, and high stocked (1.8 to 1.4 t live weight/ha/year) and rotational grazing Digitaria decumbens pastures. They lie upon good performance levels of local breeds, Creole cattle and Creole goats of Guadeloupe and Martinik ewes, and upon improved general husbandry. Both sheep and goat in IGS exhibit high levels of productivity. They reached up to 1000 kg LW of weaned offsprings and 1400 kg …

Potential Of Crop Rotation Using Forages In The Tropics, P. L. Mafongoya

IGC Proceedings (1977-2023)

Soil fertility is a fundamental biophysical root cause of food insecurity sub-Saharan Africa. Low quality crop residues and grasses during the dry season also limit animal productivity. Forage legumes (herbaceous and tree legumes) have great potential to increase crop animal productivity. Technologies have been developed over the past 3 decades to fully integrate forage legumes into farming. Most of these technologies are still on shelves with low adoption by farmers. Rhe role of forage legumes in nutrient cycling is reviewed in this paper. The factor limiting adoption will also be discussed. Innovative dissemination pathways to increase adoption will be suggested.

The Role Of Forages In Sustainable Cropping Systems Of Southern Australia, William D. Bellotti

IGC Proceedings (1977-2023)

The historical context, recent trends, and possible future role of forages in cropping systems are reviewed. Three recent themes will be developed: 1) The successful exploitation of genetic diversity resulting in commercial development of new legume species as pasture cultivars with specific traits better suited to the needs of current farming systems. 2) Improved understanding of key soil processes under grazed pastures, particularly soil water and soil nitrogen, and how these processes impact on indicators of sustainability like deep drainage and nitrate leaching. 3) An emerging capacity for predicting the effect of pasture-crop sequences on soil processes, crop growth and …

Performance Of Millet Cultivars In Succession To Field Crop Of Beans In Southern Portion Of State Of Minas Gerais - Brazil, José C. Pinto, M. C. Maia, A. R. Evangelista, I. F. De Andrade, Joel Augusto Muniz, I. P. A. Dos Santos, E. R. P. Bomfim

IGC Proceedings (1977-2023)

This trial was carried out at the Department of Animal Science - Universidade Federal de Lavras (UFLA), from February to June, 1997. It was evaluated the performance of three millet [Pennisetum glaucum (L.) R. Br.] cultivars, as a second crop (Common, BN 2 and CMS 02) and four sowing dates (02/22, 03/14, 04/03 and 04/23). The three millet cultivars were sown after a cropping of beans (Phaseolus vulgaris L.) by the end of the rainy season, with no additional fertilization. It was used the randomized block design in a split-plot scheme, allocating the sowing dates on the main …

Forage Yield And Nutritive Value Of Spring Oats For Various Cultivars And Planting Dates At The Middle Mountain Area, S. Seo, W. H. Kim, D. E. Shin, G. J. Choi, G. J. Park

IGC Proceedings (1977-2023)

The experiment was carried out to determine the optimum cultivars and effects of planting date on growth, forage yield and nutritive value of spring sown oats (Avena sativa L.) at the middle mountainous area, Namwon, NLRI, Korea, 1998. The cultivars used in this study was Cayuse, Swan, Foothill, Cashel, Martlock and Winjardie, and the planting dates were 9, 14, 19, 24 and 29 March, and all the forages were harvested on 9 June. Swan among spring oats was the earliest heading type (21 May), and then Martlock (25 May), Winjardie (27 May), and Foothill was the latest (14 June). …

Performance Of Steers In Brachiaria Decumbens Pastures, Permanent And In Rotation With Soybean, L. A. Z. Machado, A. C. Fabrício, J. C. Salton

IGC Proceedings (1977-2023)

The integration agriculture/pasture is an alternative that allows countless benefits to the rural producer. At Embrapa Agricultural West four production systems were studied and two of them involved animal production. The systems Soybean/Pasture Rotation and Permanent Pasture were compared from september/98 to may/99. The availability and residue of dry matter of green leaves blades (DMGLB), stems (SDM) and senescent material, the gain/animal and gain/area was evaluated. The availability was monthly assessed. Herbage residue was higher in the Soybean/Pasture Rotation system. This system allowed gain/animal and gain/ha of 0.814 kg/day and 582 kg/ha, respectively, whereas the Permanent Pasture system the gain …