Strategies for Maintenance and Improvement of Soil Productivity Under Continuous Maize and Beans Cropping System in the Sub-humid Highlands of Kenya: Case Study of the Long-Term Trial at Kabete

2012 ◽  
pp. 59-84 ◽  
Author(s):  
C. N. Kibunja ◽  
F. B. Mwaura ◽  
D. N. Mugendi ◽  
P. T. Gicheru ◽  
J. W. Wamuongo ◽  
...  
Keyword(s):  
Cropping System ◽  
Soil Productivity ◽  
Term Trial ◽  
Continuous Maize

A degradation threshold for irreversible loss of soil productivity: a long-term case study in China

2011 ◽  
Vol 48 (5) ◽  
pp. 1145-1154 ◽  
Author(s):  
Yang Gao ◽  
Binglin Zhong ◽  
Hui Yue ◽  
Bin Wu ◽  
Shixiong Cao
Keyword(s):  
Soil Productivity ◽  
Irreversible Loss

Long-Term Effect of No-Tillage on Soil Organic Carbon Fractions in a Continuous Maize Cropping System of Northeast China

Pedosphere ◽  
2010 ◽  
Vol 20 (3) ◽  
pp. 285-292 ◽  
Author(s):  
Shan HUANG ◽  
Yan-Ni SUN ◽  
Wen-Yi RUI ◽  
Wu-Ren LIU ◽  
Wei-Jian ZHANG
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Northeast China ◽  
Cropping System ◽  
Term Effect ◽  
No Tillage ◽  
Long Term Effect ◽  
Continuous Maize ◽  
Organic Carbon Fractions

scholarly journals Long Term Effect (17 Years) of Different Nutrient Management Practices on Crop Yield Trends, Soil Productivity and Sustainability in Rice-rice Cropping System under Semi Arid Tropical Climatic Condition in an Inceptisol of India

2019 ◽  
pp. 1-14
Author(s):  
G. Kiran Reddy ◽  
S. H. K. Sharma ◽  
K. Chandra Shaker ◽  
P. Ravi ◽  
Muneshwar Singh ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Rainy Season ◽  
Block Design ◽  
Cropping System ◽  
Organic Fertilizers ◽  
Optimum Dose ◽  
Soil Productivity ◽  
Continuous Cropping ◽  
Available N

A long term fertilizer experiment was initiated at PJTSAU sub campus, Jagtial, Telangana state, during rainy season of the year 2000-01 in rice-rice continuous cropping system. The experiment was conducted in a fixed plan layout with 11 treatments (and 1 fallow) which included various combinations of inorganic and organic fertilizers and was replicated 4 times under randomized block design. At the initiation of Experiment the soil properties were clay texture with pH 8.22, organic carbon 7.9 g/kg, Available Nitrogen (N) 107.6 kg/ha, Available Phosphorus (P) 19.6 kg/ha and Available Potassium (K) 364 kg/ha. The study was conducted over a period of 17 years comprising of 34 cropping cycles, in rainy season where all treatments received optimum dose (100% NPK), super optimum dose (150% NPK) and integrated treatments (100% NPK + FYM 5 t/ha) (FYM – farm yard manure) gave onpar yields. However in the post rainy season, 150% NPK treatment gave superior yield compared to all treatments except NPK+ FYM 5 t/ha. NPK + FYM 5 t/ha and 150% NPK treatments recorded the most sustainable yield index (SYI) of 0.65 in rainy and post rainy season respectively. Over all mean SYI, was highest for NPK + FYM 5 t/ha and 150% NPK i.e., 0.63 and the least was observed in 100% N alone 0.50. There was an increase in organic carbon, Available N, Available P and Available K in NPK + FYM 5 t/ha and 150% NPK treatments compared with other treatments. Treatment receiving N alone i.e. imbalance nutrient supply retrogress the crop yields and soil productivity in long run.

scholarly journals Effect of three decade long application of chemical fertilizer and amendments on crop yield under maize - wheat cropping system in an acid alfisol

2014 ◽  
Vol 6 (1) ◽  
pp. 106-109 ◽  
Author(s):  
R. P. Sharma ◽  
Vandana Kaushal ◽  
Gayatri Verma ◽  
S. P. Sharma
Keyword(s):  
Grain Yield ◽  
Crop Yield ◽  
Farmyard Manure ◽  
Cropping System ◽  
Optimal Dose ◽  
Crop Productivity ◽  
Wheat Crop ◽  
Npk Fertilizers ◽  
Continuous Maize

The results on the effect of three decade long term application of chemical fertilizers and amendments on the yield of continuous maize-wheat crop rotation in an acid alfisol at Palampur revealed that continuous omission of essential nutrients in a maize-wheat sequence resulted in an appreciable decline in the grain yield of maize and wheat crops. A remarkable reduction in crop yield was noticed in plots where nitrogen was applied alone. Use of recommended level of N alone through urea had deleterious effect on crop productivity. The continuous exhaustionof native pools of K in 100% NP treated plots appreciably reduced percent grain yield. Application of farmyard manure (FYM) and lime along with NPK fertilizers increased the crop yield. The integrated use of optimal dose of NPK and FYM give better and more sustainable yields.

A case study comparing a randomized withdrawal trial and a double-blind long-term trial for assessing the long-term efficacy of an antidepressant

2007 ◽  
Vol 6 (1) ◽  
pp. 9-22 ◽  
Author(s):  
Craig Mallinckrodt ◽  
Christy Chuang-Stein ◽  
Paul McSorley ◽  
Jeffrey Schwartz ◽  
Donald G. Archibald ◽  
...  
Keyword(s):  
Double Blind ◽  
Term Efficacy ◽  
Term Trial

Caregivers' Perceptions of Speech-Language Pathologist Talk About Child Language and Literacy Disorders

2020 ◽  
Vol 29 (4) ◽  
pp. 2049-2067
Author(s):  
Karmen L. Porter ◽  
Janna B. Oetting ◽  
Loretta Pecchioni
Keyword(s):  
Language And Literacy ◽  
Collective Case Study ◽  
Study Approach ◽  
School Aged Children ◽  
Speech Language Pathologist ◽  
Therapy Goals ◽  
Semistructured Interviews ◽  
Types Of Information

Purpose This study examined caregiver perceptions of their child's language and literacy disorder as influenced by communications with their speech-language pathologist. Method The participants were 12 caregivers of 10 school-aged children with language and literacy disorders. Employing qualitative methods, a collective case study approach was utilized in which the caregiver(s) of each child represented one case. The data came from semistructured interviews, codes emerged directly from the caregivers' responses during the interviews, and multiple coding passes using ATLAS.ti software were made until themes were evident. These themes were then further validated by conducting clinical file reviews and follow-up interviews with the caregivers. Results Caregivers' comments focused on the types of information received or not received, as well as the clarity of the information. This included information regarding their child's diagnosis, the long-term consequences of their child's disorder, and the connection between language and reading. Although caregivers were adept at describing their child's difficulties and therapy goals/objectives, their comments indicated that they struggled to understand their child's disorder in a way that was meaningful to them and their child. Conclusions The findings showed the value caregivers place on receiving clear and timely diagnostic information, as well as the complexity associated with caregivers' understanding of language and literacy disorders. The findings are discussed in terms of changes that could be made in clinical practice to better support children with language and literacy disorders and their families.

Dissociation of short- and long-term memory recency effects: A case study

2001 ◽  
Author(s):  
Randi C. Martin ◽  
Mary R. Newsome ◽  
Monica L. Freedman
Keyword(s):  
Long Term Memory ◽  
Term Memory ◽  
Recency Effects ◽  
Short And Long Term
Sign in / Sign up

Export Citation Format

Share Document