scholarly journals Relative Infiltration Rate of Puerto Rican Soils

1969 ◽  
Vol 52 (3) ◽  
pp. 233-240 ◽  
Author(s):  
M. A. Lugo López ◽  
J. Juárez ◽  
J. A. Bonnet
Keyword(s):  
Puerto Rico ◽  
Puerto Rican ◽  
Classification System ◽  
Sandy Loam ◽  
Infiltration Rate ◽  
Department Of Agriculture ◽  
Mean Values ◽  
Infiltration Rates ◽  
The Mean ◽  
The U.S

Data are presented here on the minimum rate of infiltration (eighth-hour) of 57 main soil types of Puerto Rico. The study included a total of 740 tests. Mean infiltration rates vary from a high value of 11.49 inches of water per hour in Yunque sandy loam, to a low of 0.07 in Aguirre clay, and 0.01 in Palmas Altas and Britton clay. When the soils were arranged according to a simple, practical classification system in use in Puerto Rico the mean values ranged from 0.01 in group 5w to 7.82 inches in group 11. When the soils were grouped following the latest classification system developed by the U.S. Department of Agriculture, mean values for soils included in the order Vertisol ranged from 0.07 to 3.83 inches. Mollisols, Oxisols, and Ultisols showed the highest infiltration values. Information is hereby given as to the effects of various soil treatments on infiltration rates.

scholarly journals Caloric contribution of imported and locally produced food in Puerto Rico

2021 ◽  
Vol 101 (1) ◽  
pp. 121-141
Author(s):  
Julio César Hernández ◽  
Myrna Comas-Pagán ◽  
Alwin Jiménez ◽  
Sandra Blas
Keyword(s):  
Puerto Rico ◽  
Puerto Rican ◽  
Dairy Products ◽  
Human Services ◽  
Normal Weight ◽  
Dietary Guidelines ◽  
Department Of Agriculture ◽  
Demographic Groups ◽  
Department Of Health ◽  
The U.S

The aim of this article is to evaluate the caloric contribution of the top imported and locally produced foods in Puerto Rico. Data from the USDA and Puerto Rico Planning Board were used to estimate caloric needs in different demographic groups and projected until 2025. In analyzing Puerto Rican produce, the caloric contribution of local production was estimated to be around 18 percent. By contrast, when the caloric contribution of 50 foods imported and produced in Puerto Rico was evaluated, these foods account for 115 percent of the calories needed daily for the population to maintain a normal weight. Sugar, rice, vegetable oil, milk and corn make the greatest contribution to the Puerto Rican diet, representing an estimated 58 percent of average number of calories that Puerto Ricans should consume. The distribution of calories identified in these 50 articles consumed in Puerto Rico (e.g., fruits, vegetables, dairy products, proteins, carbohydrates, etc.) shows serious discrepancies from the distribution suggested by the 2015-2020 Dietary Guidelines developed by experts of the U.S. Department of Health and Human Services and the U.S. Department of Agriculture. For example, 34 percent of the calories consumed in Puerto Rico correspond to foods high in sugar and fat.

Rates of Cesarean Delivery Among Puerto Rican Women - Puerto Rico and the U.S. Mainland, 1992-2002

2006 ◽  
Author(s):  
R. Varela-Flores ◽  
◽  
H. Vázquez-Rivera ◽  
F. Menacker ◽  
Y. Ahmed ◽  
...  
Keyword(s):  
Puerto Rico ◽  
Puerto Rican ◽  
Cesarean Delivery ◽  
Puerto Rican Women ◽  
The U.S

MMPI-2 Scores of Puerto Rican, Mexican, and U.S. Latino College Students: A Research Note

2000 ◽  
Vol 87 (1) ◽  
pp. 266-268 ◽  
Author(s):  
Jose J. Cabiya ◽  
Denise A. Chavira ◽  
Francisco C. Gomez ◽  
Emilia Lucio ◽  
Jeanett Castellanos ◽  
...  
Keyword(s):  
United States ◽  
College Students ◽  
Puerto Rico ◽  
Standard Deviation ◽  
Puerto Rican ◽  
The United States ◽  
Clinical Scale ◽  
The Mean ◽  
The One ◽  
Scale Data

In this brief report, we present MMPI-2 basic validity and clinical scale data of Latino-descent persons from Puerto Rico ( n = 290), Mexico ( n = 1,920), and the United States ( n = 28). All were administered one of three Spanish translations of the MMPI-2. A review of the mean scores of these respective groups indicates similarities across all scales. Differences among these three groups, with the exception of the Mf scale (which is keyed to sex), were well within the one standard deviation band. More importantly, these findings are promising given the fact that three different translations of the MMPI-2 were applied.

Assessment of variability of soil Infiltration Characteristics in Forage Cover

2020 ◽  
Vol 7 (03) ◽  
Author(s):  
AKRAM AHMED ◽  
A. K. PAL ◽  
V. K. PANDEY ◽  
MAHENDRA PRASAD ◽  
ASHUTOSH UPADHYAYA
Keyword(s):  
Steady State ◽  
Sandy Loam ◽  
Infiltration Rate ◽  
Panicum Maximum ◽  
Soil Infiltration ◽  
Infiltration Rates ◽  
Bare Land ◽  
Physically Based ◽  
Loam Soil ◽  
Horton Model

In India, very limited knowledge of soil infiltration characteristics in forages are available. In this study, infiltration characteristics of land covered by six forages have been studied with respect to bare land in sandy loam soil. Two empirical (Kostiakov and Horton) and two physically-based (Phillip and Green‒Ampt) models have been employed to estimate infiltration characteristics and compared with observed field infiltration data. The steady-state infiltration rates measured in forages and bare land were significantly (p less than 0.05) different. The highest average steady-state infiltration rate was measured in Panicum maximum (9.00 cm h-1) followed by TSH (7.40 cm h-1) and least was recorded in Cenchrus ciliaris (2.65 cm h-1) whereas the average steady-state infiltration rate recorded for bare land was 1.90 cm h-1. Results showed that the Kostiakov and Phillip model simulated the field infiltration characteristics with higher accuracy than the two other models except for Chrysopogonfulvus and bare land in which the Horton model outperformed other models. Higher steady-state infiltration rates in forages were attributed to more porosity measured in the soils under forages as compared to bare land.

Introduction

2017 ◽  
Author(s):  
Faye Caronan
Keyword(s):  
Puerto Rico ◽  
Puerto Rican ◽  
The United States ◽  
The Philippines ◽  
Cultural Representation ◽  
Racial Stereotypes ◽  
Filipino American ◽  
Cultural Productions ◽  
Global Power ◽  
The U.S

This book explores how Filipino American and U.S. Puerto Rican cultural critiques are delegitimized and obscured by U.S. imperialism and global power. Drawing on Raymond Williams's dual definitions of culture as both the experience of everyday life within a society and the cultural productions that circulate within society, the book analyzes the ways that Filipinos and Puerto Ricans have been represented to affirm narratives of U.S. exceptionalism in the early twentieth century and today. It considers how recent Filipino American and U.S. Puerto Rican cultural productions across multiple genres critique these justifications, and how the U.S. cultural market contains these critiques to reaffirm revised narratives of U.S. exceptionalism. This introduction provides an overview of the institutionalized narrative of U.S. colonialism in the Philippines and Puerto Rico, the politics and economics of Filipino American and U.S. Puerto Rican cultural representation, and hegemonic narratives of racial stereotypes in the United States.

Evaluation and Acceptability of Cassava Cultivars

1969 ◽  
Vol 67 (1) ◽  
pp. 16-21
Author(s):  
Oscar D. Ramírez ◽  
José J. Green ◽  
Isabel Beauchamp de Caloni
Keyword(s):  
Puerto Rico ◽  
Hydrocyanic Acid ◽  
Preliminary Evaluation ◽  
Manihot Esculenta Crantz ◽  
Organoleptic Evaluation ◽  
East Central ◽  
Mean Values ◽  
Overall Acceptability ◽  
The Mean ◽  
Toxicity Level

On the basis of yield and organoleptic evaluation, out of 10 cassava (Manihot esculenta Crantz) cultivars, IAC-12-829, IAC-Mantequeira, Jamaica 18 and Trinidad 14-56 are the most promising in this preliminary evaluation. The 10 cassava cultivars were evaluated in the hilly humid East Central region of Puerto Rico. The highest yielders were IAC 12-829, IAC-Mantequeira, Jamaica 18, and SRT-598-Sta. Catarina with 41.98, 39.24, 35.17 and 31 .13 tons/ha, respectively. Hydrocyanic acid content among cultivars was well below the toxicity level (50-100 mg/kg). The mean values ranged from 0.0 up to 22.3 mg HCN/kg of fresh peeled root. Regarding overall acceptability by the tasting panel all except Sta. Catarina cultivar were acceptable.

scholarly journals The Effect of Pulverization Tools and Tractor Speed on Some Machinery Performance and Yield of BarleyHoridium vulagri L.

2018 ◽  
Vol 7 (1) ◽  
pp. 18-23
Author(s):  
Saif Ahmed Rawdhan
Keyword(s):  
Field Experiment ◽  
Field Study ◽  
Seed Yield ◽  
Block Design ◽  
Department Of Agriculture ◽  
Mean Values ◽  
Randomized Complete Block Design ◽  
Biological Yield ◽  
The Mean ◽  
Optimum Production

Field experiment has been conducted during autumn season of 2011-2012 at the experimental farm, Department of Agriculture Machines Science, Collage of Agriculture –University of Baghdad. A field study has been carried out to determine the effect of pulverization tools and tractor speed on yield of barley crops for optimum production and some machinery group. Pulverization tools treatments are (rotivator, disk harrow and spring cultivator). Tractor speed is (4 and 5 km hr-1). Randomized complete block design with three replications and LSD (0.05) is used to compare the means of treatments at 0.05.The experiment results show the following: The treatment of pulverization using rotivator+5 km hr-1 tractor speed achieves higher practicalproductivity with mean recorded 0.99 ha hr-1, and lower fuel consumption combined and slippage percentage with mean 28.31 and 7.77% respectively as  compared with disk harrow and spring cultivator The mean values of the pulverization tools and tractor speed show that rotivator+5 km hr-1 tractor speed gives heights value biological yield (t/ha) and seed yield (t/ha) recorder 18.23 and 5.85 Ton ha-1.

scholarly journals Genetic Diversity of Puerto Rican Farmer-held Papaya (Carica papaya) Using SSR Markers

HortScience ◽  
2018 ◽  
Vol 53 (8) ◽  
pp. 1109-1114 ◽  
Author(s):  
Dianiris Luciano-Rosario ◽  
Luis A. Cruz-Saavedra ◽  
Dimuth Siritunga
Keyword(s):  
Genetic Diversity ◽  
Puerto Rico ◽  
Genetic Resources ◽  
Puerto Rican ◽  
Ssr Markers ◽  
Carica Papaya ◽  
Plant Genetic Resources ◽  
Group Method ◽  
Department Of Agriculture ◽  
Pair Group

Native to Central America, papaya (Carica papaya) is one of the most cultivated fruit crops in the tropical areas of the world. Genetic diversity analyses are an important aspect of conservation of plant genetic resources. In the island of Puerto Rico, where papaya has been consumed for centuries, knowledge on the genetic diversity of papaya is lacking. Therefore, 162 papaya accessions were evaluated using 23 simple sequence repeat (SSR) markers. Of these accessions, 139 were farmer-held samples from Puerto Rico, 13 were U.S. Department of Agriculture (USDA) repository samples, and 10 were commercial varieties. A total of 214 alleles were identified with a mean observed heterozygosity (Ho) of 0.219. Inbreeding coefficient (F) was 0.565, and when evaluating the population structure of these accessions, 2 groups (k = 2) were identified. Unweighted pair group method with arithmetic mean (UPGMA) dendrogram showed no geographical organization within the unknown Puerto Rican samples. This assessment provides an extensive record of the genetic diversity of papaya in Puerto Rico which can contribute to breeding strategies and to the conservation of papaya genetic resources in the Caribbean.

scholarly journals Potassium content of Puerto Rican soils as related to sugarcane growing

1969 ◽  
Vol 37 (3) ◽  
pp. 183-194
Author(s):  
Juan A. Bonnet
Keyword(s):  
Puerto Rico ◽  
Citric Acid ◽  
Puerto Rican ◽  
Acid Soil ◽  
Yield Response ◽  
Chemical Methods ◽  
Stages Of Growth ◽  
Significant Yield ◽  
The Mean ◽  
Soil Groups

The potash-bearing minerals, the total potash content in some profiles, the available potash range, and the mean available potash extracted by 1-percent citric acid and by dwarf sorghum (hegari) in pot tests, are reported here for Puerto Rican soil groups. In soils in which feldspars were present, the mean available potash extracted by the sorghum and by citric acid was equivalent to 747 and 376 pounds of K2O per acre, respectively. The sorghum extracted about twice as much potash. In soils from which feldspars were absent, the mean available potash extracted by the sorghum and by citric acid was equivalent to 440 and 365 pounds of K2O per acre, respectively. Chemical methods are therefore not always reliable to determine the potash that plants absorb from the soil. Tests of the response of sugarcane in Puerto Rico to the application of potash fertilizers generally have been limited to a few soils. Optimum sugarcane yields of P.O.J. 2878 were obtained in the first five consecutive crops, in an acid soil of Puerto Rico, with a minimum applicacation of 90 pounds of K2O per crop per year. The sixth and later sugarcane crops, and the 9-crop mean yield, responded significantly to the application of potash in excess of 90 pounds of K2O per acre. No significant yield response was obtained with M. 336 grown in sand lysimeters with four increment levels varying from 19 to 253 pounds of K2O per acre, respectively. No significant correlation was obtained either between cane yields and the K contents of the cane leaves at different stages of growth. The 3-month cane leaves varied from 1.54 to 2.94 percent of K, with the minimum and maximum applications of potash, respectively.

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