"9785","9","archive","1305",,,"disk0/00/00/97/85","2016-11-16 04:35:53","2016-11-16 04:35:53","2016-11-16 04:35:53","article",,,"show",,,,"","","","","","","","","","",,,,"Wafula","W N","","","","","","","Wafula","W N","","","","",,,,,"","",,,,,"","","Department of Agricultural Science and Technology, Kenyatta University (Nairobi)","Kenya","Effect of Phosphate Levels on Soil Rhizosphere Nutrient Balances and Finger Millet Yield","pub","S1.5","CRPS5","crp1.4","public",,,"Finger millet; soil infertility; phosphorus; adsorbed; rhizosphere; Soil sampling",,"We would like to thank the International Crops
Research Institute for the Semi-Arid Tropics
(ICRISAT)-Nairobi, for funding the project.
Special thanks to the Director-ESA, Dr. Moses
Siambi and the Principal Scientist, Dr. Eric
Manyasa for their intellectual and moral support.
Special thanks to the entire ICRISAT staff in
Nairobi and Kiboko particularly Mr. Patrick
Sheunda, Mr. Gelvasio Mukono and Mr. Joseph
Kibuka as well as the casuals who made this
work possible and successful in the field. We are
also much grateful to the Kenya Soil Survey a
division of the National Agricultural Research
Laboratories for conducting the analysis.","Soil infertility is one of the main factors leading to low finger millet production in the semi-arid
tropics of Kenya. About 50-80% of P applied as fertilizer is adsorbed by soil and the amount of P
needed to achieve maintenance of its adequate status and influence on other soil properties has
not been well documented. An on-station experiment was therefore conducted at the KALROKiboko
research station during the 2014 long and 2015 short rain seasons to investigate the
influence of phosphorus rates on soil rhizosphere chemical properties and yield of three finger
millet varieties. The experiment was laid out in a Randomized Complete Block Design in factorial
arrangement and replicated three times. There were four P levels (0, 12.5, 25 and 37.5 kg ha-1
P2O5) and three varieties (U15, P-224 and local check-Kat FM1). Phosphorus application reduced 
the soil pH significantly for both seasons with the 37.5 kg ha-1 P2O5 rate eliciting the greatest pH
from 9.26 to 7.90 (1.36 units) during the long rain season. As expected, soil phosphorus increased
with the highest rate with 11 ppm during the long rain season and 9 ppm for the short rains. The
organic carbon increased by 0.28% for the long rain season on the 25 kg ha-1 P2O5 rate while the
highest rate increased total N by 0.05%. The 25 kg ha-1 P2O5 rate and U-15 indicated the highest
yield for both seasons with a maximum of 3.71 t ha-1 realized during the short rain season.
Monitoring change in soil nutrient status is important for prescribing P fertilization in order to
maintain or replenish soil fertility. The application rate of 25 kg ha-1 P2O5 led to the optimal yields
under the improved variety and hence the study recommends this rate.","2016","published",,"Asian Research Journal of Agriculture","02","01","Science Domain International",,"01-08",,,,,,"10.9734/ARJA/2016/29606",,,,,"TRUE",,,,,,,,"","http://dx.doi.org/10.9734/ARJA/2016/29606","https://scholar.google.co.in/scholar?hl=en&q=+Effect+of+Phosphate+Levels+on+Soil+Rhizosphere+Nutrient+Balances+and+Finger+Millet+Yield&btnG=","pub",,"","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,
"9785",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Korir","N K","","",,,,,"Ojulong","H F","","",,,,,,,,,,,,,,,"ICRISAT (Nairobi)",,,,"S1.5.2",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"9785",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Ojulong","H F","","",,,,,,,,,,,,,,,,,,,,,,,,,,,"S40006",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"9785",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Gweyi-Onyango","J P","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,