نتایج جستجو برای: potato growers
تعداد نتایج: 25488 فیلتر نتایج به سال:
The objective of this study was to evaluate the strategies for groundwater resources management, including competition groundwater pumping, optimal control in groundwater pumping, groundwater use and tax policy, water users' participation in groundwater pumping control, and cooperation among government and water user associations in Narimany plain located in Khorasan Province. Irrigation wate...
This study was performed to determine whether active optical sensors could develop an algorithm for N recommendation the potato crop (Solanum tuberosum L.). The experiment conducted in Maine State, (USA) during growing season of 2018-2019. Six rates (0-280 kg ha-1) were applied on eleven locations under a randomized complete block design (RCBD), with four replications. Data normalized differenc...
Transgenic maize engineered to express insecticidal proteins from the bacterium Bacillus thuringiensis (Bt) has become widely adopted in U.S. agriculture. In 2009, Bt maize was planted on more than 22.2 million hectares, constituting 63% of the U.S. crop. Using statistical analysis of per capita growth rate estimates, we found that areawide suppression of the primary pest Ostrinia nubilalis (Eu...
The reform of the European Union's sugar regime caused potential decreasing beet prices. Therefore, the Speeding Up Sugar Yield (SUSY) project was initiated. At the start, a 3 × 15 target was formulated: in 2015 the national average sugar yield in the Netherlands equals 15 t/ha (60% of the sugar beet potential) and the total variable costs 15 euro/t sugar beet, aspiring a saving on total variab...
Survival and fecundity of Colorado potato beetle adults, Leptinotarsa decemlineata (Say), that had or had not fed previously on non-transgenic potato before exposure to transgenic potato containing the Bacillus thuringiensis subsp. tenebrionis Cry3A toxin (Bt) was investigated. In the laboratory, < 5% of first-generation adults survived after two weeks when restricted to Bt foliage since eclosi...
In this article we propose and solve a game-theoretic model of a rank-order tournament with private information. Using the contract settlement data from a poultry company, we estimate a fully structural model of a symmetric Nash equilibrium of this game. We show that growers’ equilibrium effort depends on four factors: the spread in piece rates between the performance brackets, the number of pl...
Information flows are weaker in a heterogeneous population when the performance of a new technology is sensitive to unobserved individual characteristics, preventing individuals from learning from neighbors’ experiences. This characterization of social learning is tested with wheat and rice data from the Indian Green Revolution. The rice-growing regions display greater heterogeneity in growing ...
The purpose of this study was to investigate the role of extension services in enhancing effectiveness of out growers’ credit system in Kisumu County, Kenya. The study specifically sought to determine whether public and private extension services play a significant role in enhancing effectiveness of out-growers’ credit system among smallholder sugarcane farmers. A total of 110 small scale farme...
The study assessed adoption of improved fish pond management technologies among fish growers in Benue State, Nigeria. Stratified, purposive and simple random sampling techniques were used in selecting 221 respondents. Primary data were collected using structured questionnaire. Data collected were analysed using both descriptive such as frequency distribution tables and inferential statistics su...
this research was done aimed to investigation the effective factors on production skills of tobacco growers in mazandaran province. this is an applied study based on descriptive-correlation method. statistical population of this research consisted of 1500 tobacco growers of mazandaran province, and 306 people were selected based on morgan table. content validity of the questionnaire was determ...
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