Response of the Board of Directors of IFDC to the Recommendations of TAC

Official reply from the IFDC Board of Directors to TAC's recommendation to not include the IFDC in the CGIAR system. Pages 3 and 4 are missing from this copy. Agenda document, CGIAR meeting May 1979

PENGARUH DOSIS PUPUK MAJEMUK DAN INTERVAL PENYEMPROTAN PUPUK DAUN TERHADAP PERTUMBUHAN ANTHURIUM DAUN WAVE OF LOVE (Anthurium sp.)

The research aimed to find out about the influence of compound fertilizer through roots and leaves to the growth of wave of love leaf anthurium. There was interaction between the treatment of fertilizer dosage through roots and interval of leaf fertilizer spraying to the growth of wave of love leaf anthurium. Compound fertilizer could increase/fix the growth of wafe of love leaf anthurium, leaf fertilizer spraying could influence the growth of wafe of love leaf anthurium. The research was done at Lowokwaru sub-district Malang City, with 550m upper sea surface height. The research was started in September to December 2008. Tool used in this research was measurement glass, ruler, meter measurer, plastic, plastic pot, bamboo, dipper, sprayer, spidol, book, and writing tool. Material used was anthurium seed (wave of love), organic fertilizer, Decastar compound fertilizer (13:13:13), GrowMore leaf fertilizer, Apsha leveller, fungicide dithane insecticide Mipcsin. The research was done by Split Plot Design arranged in factorial with three repeats. Major box was spraying interval, consisted of three level, they were: I1: once in four days interval, I2: once in four days interval, I3: once in 12 days interval, while member box was Decastar compound fertilizer dosage, consisted of 4 levels, they were: DO: 0g/plant dosage, D1: 1,5g/plant dosage, D2: 3g/plant dosage, D3: 4,5 g/plant dosage. According to the research, there found that there was interaction between leaf fertilizer dosage and compound fertilizer dosage to the plant height, leaves amount. The best treatment was I3D2, I3D3, I1D2, I2D1, and I2D2. Combination of spraying with once in 12 days spraying and 3 g/plant dosage. Leaves fertilizer spraying dosage has unreal influence to the plant height, leaves amount, stem height, and leaf width. The treatment of compound fertilizer dosage has significant influence to the plant height, leaves amount, the leaf width, where D3 dosage (4,5 g/plant) has no difference with D2 (3 g/plant). Good fertilizer with 3 gram dosage per plant (D2)

Testing an Online Spread Pattern Determination Sensor on a Broadcast Fertilizer Spreader

An alternative method for fertilizer spread pattern determination was developed based on predicting where individual fertilizer particles land on the ground, in contrast to the traditional method of collecting the particles in bins (ASAE Standard S341.2). A small broadcast granular fertilizer spreader (Lowery 300) was equipped with an optical sensor designed to measure the velocity and diameter of individual fertilizer particles shortly after they leave the impeller disc. The measured velocity and diameter of individual particles were input into a ballistic model that predicted where particles land on the ground. A total of over 1000 landing spots revealed the spread pattern. The results have shown that the optical sensor is capable of automatically determining the spread pattern of a fertilizer spreader on the fly. The sensor could be a key component in the development of uniformity-controlled fertilizer application systems

Assessment of Organic Fertilizer Usage by Garden Egg Farmers in Enugu State, Nigeria

The study was undertaken to assess organic fertilizer usage by garden egg farmers in Enugu State, Nigeria. The multistage sampling technique was used to select 80 garden egg farmers. Descriptive statistics and multiple regression analysis were used to analyse data for the study. The mean age of respondents was 39 years. Fifty-five percent (55 %) of respondents were married. The majority (97.5 %) of the respondents used farmyard manure while the average cost of organic fertilizer was N57372.73. A lesser percentage (7.5 %) of respondents in the study applied over 2000 kg of organic fertilizer per hectare with 40 % applying twice per season. The perceived benefit of organic fertilizer was: improvement of soil fertility (2.95 ± 1.12), environment-friendly (2.99 ± 1.23). A constraint identified in the use of organic fertilizer was: slow effect (2.12 ± 1.43), Odorous nature (2.06 ± 1.28) and difficulty in the collection and handling of organic fertilizer (2.72 ± 1.03). The study among other things recommends that farmers be granted credits and extension services that will teach them the required skills in the handling and use of organic fertilizer

EXTENT OF MINERALIZATION ORGANIC FERTILIZER ON SALT AFFECTED SOIL AND THAT IMPLEMENTATION ON TOMATO

Mineralization of organic fertilizers in saline soil is determined by the level of soil salinity. The higher levels of soil salinity, the lower the ability of organic matter mineralization. Evaluation mineralization levels assessed by the content of N, P, K, C-org in organic fertilizer. Research objectives were to assess the ability of the various formulas of mineralization of organic fertilizer to provide nutrients and suppress soil salinity. Nutritional NPK fertilizers are classified by grade. The results showed that the formula with high-grade organic fertilizer was obtained from a mixture of manure, compost, guano, and straw. High-grade organic fertilizer is not always effective as the controlling soil salinity and aggregate stability, but can increase the CEC and the availability of N, N Ammonium inhibits volatilization, decrese soil EC, but soil pH was increased. Mineralization rate of organic fertilizer on clay-textured soil (Rungkut and Sedati) more slowly than sandy soil (Buduran). Keywords: grade, mineralization, NPK, organic fertilizers, soil salinit

CERTAINTY EQUIVALENCE FOR DETERMINATION OF OPTIMAL FERTILIZER APPLICATION RATES WITH CARRY-OVER

This note demonstrates that a certain class of stochastic problems for determination of optimal fertilizer application rates in the presence of fertilizer carry-over can be simplified to static, certainly equivalent problems. Conditions required for certainty equivalence to hold are: (1) fertilizer carry-over is agronomically equivalent to applied fertilizer; and (2) some addition of fertilizer is optimal in every decision period.Crop Production/Industries,

PlantyOrganic: Design and results 2012

Increasingly strict legislation about fertilizer inputs and developing organic regulations are a strong stimulation to optimize the internal nutrient dynamics of organic arable farms. In the project “PlantyOrganic” , initialized by Biowad and realized at SPNA location Kollumerwaard, a challenging arable system is developed and tested: 100% internal nitrogen supply without input of nutrients from outside. In this report the design of the rotation and fertilizer scheme is presented and discussed, and the starting conditions in spring 2012 are documented. The NDICEA nitrogen model is used to explore the nitrogen dynamics. It is concluded that a 100% farm-own nitrogen supply can be achieved with good production levels. The 2012 results gave no reason to reconsider the rotation and fertilizer design, but since this was the first year of this experiment none of the crops had the precrop as foreseen in the design and the fertilizer used was only partly cut-and-carry fertilizer

1943 Fertilizer Recommendations

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